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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2366982@logan.com>
Subject: Re: [FlyRotary] Re: Problem? [FlyRotary] Re: Coolant Water Pressure
Date: Wed, 3 Oct 2007 19:18:55 -0400
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Grass? what grass? {:>)
Yes, it sounds like the air should rise to the top of your slanted =
radiator. However, My experience has been that unless I run the engine =
up to around 5000 rpm for about 15-30 seconds (does not have to be long) =
that I do not have much success getting air out of the block. It seems =
to take that velocity of coolant flow to drag the water out of the =
block.
You have over 700 cubic inches of core, so that should be plenty for =
cooling a two rotor. =20
A multi pass radiator (two pass in your case) can require more coolant =
pump flow as indicated by this extract from a pretty respected name in =
racing/cooling circles:
Double pass Double pass radiators require 16x more pressure to flow =
the same volume of coolant through them, as compared to a single pass =
radiator. Triple pass radiators require 64x more pressure to maintain =
the same volume. Automotive water pumps are a centrifugal design, not =
positive displacement, so with a double pass radiator, the pressure is =
doubled and flow is reduced by approximately 33%. Modern radiator =
designs, using wide/thin cross sections tubes, seldom benefit from =
multiple pass configurations. The decrease in flow caused by multiple =
passes offsets any benefits of a high-flow water pump.
=20
Again, these are just back of the envelope calculations based on a great =
deal of assumption about your parameters. My gut feel is that 700 cubic =
inches should have no problem cooling your installation at those power =
settings even being a double pass radiator. So I would look else where.
You indicate you have an approx. 80F delta T across your radiator core =
with the coolant temp a 210F. You have a fan which apparently has the =
spec to draw 970 CFI across the 11" dia of the Fan. Lets assume that =
was the flow through the entire core. Then that would give you =
970*.0765 =3D 74 lbm/min of air mass.
Q =3D 75 * .25 * 80 =3D 1500 BTU/Min just due to the flow resulting from =
your fan - it would seem that plus whatever flow you are getting from =
your prop - Prop??. =20
Hey, this dumb question just occurred to me - I assume you are =
running with a prop?? in a tractor configuration. I lose track of who =
has what.
Ed
----- Original Message -----=20
From: Bill Bradburry=20
To: Rotary motors in aircraft=20
Sent: Wednesday, October 03, 2007 5:12 PM
Subject: [FlyRotary] Re: Problem? [FlyRotary] Re: Coolant Water =
Pressure
I have an aluminum double pass radiator with the finned core size of =
about 18.25 X 18.25 X 2.25. It is behind the engine and leaning =
rearward at the top at about a 30-35* angle. The water from the engine =
enters on the left lower and crosses the bottom half of the radiator to =
the right side then rises and goes back across the top of the radiator =
and exits the top left side and returns to the engine.
My radiator cap is at the top right corner of the radiator at the =
point where the water starts its second pass through the top half. My =
pressure port is just below the radiator cap. The pressure sending unit =
is in a "T" with the hose which goes to the =BC" port at the top of the =
rear iron connected to the other side of the "T". I thought that this =
hose could have some effect on the pressure, but I am not certain why it =
would.
=20
Any air in the system should either rise to the top of the radiator, =
or if it was trapped in the block, it could come through the hose to the =
radiator. All air should be found therefore? Under the radiator cap. I =
have never found any air there.
=20
I think I found out a little something about the fuel system today. I =
only put a few gallons in the right tank and have been checking for =
leaks and running the engine on this fuel. I wanted to run it down to =
the "non-usable" level and then do the same thing with the left tank. =
So I have been really low on fuel. My pressure has been holding, but I =
thought that I could hear bubbles from time to time going through the =
lines.
=20
Anyway, before, I could get a good start by setting the mixture at =
about 4 PM oclock and it would fire up in a couple of blades. Today, I =
tried hitting the primer button a couple of times and it would start and =
immediately die. I finally had to set the cold start on and leave it on =
just to get the engine to run! Finally after it warmed up, it ran with =
the mixture set at 12 oclock, but it was not steady. As my fuel ran =
out, the pressure dropped finally to about 28 lbs and the engine started =
its death rattle. I shut it off at that time.
=20
The temperature had risen to 210* the ambient temp was 87-88* and the =
air after the radiator was 168* This is with my radiator fan running. =
(11" and 970 CFM) probably about 10-12 minutes of running the engine
.
My oil temp was only 160* and the air temp after the oil cooler was =
145* , I think that this would gone higher if I ran longer, because the =
oil in the pan was up to 170-180* or so. The pan holds 5 qts, 8 qts in =
the system.
Water pressure was up to 22-23 lbs and oil pressure was 70 lbs.
=20
All my temp probes are within a degree or so of one another and with a =
mercury thermometer in the hangar when reading ambient temp and the =
engine is cold. I think they are all correct.
=20
I have the air/fuel ratio setup that comes with the EM-2, but it =
doesn't work till the O2 sensor gets to about 800* or so, no help on =
trying to figure out starting ratio.
=20
The timing brings up a good point. I got the Renesis out of a wrecked =
car with 1800 miles on it, so the timing is set to the factory setting =
for the Renesis. I have never checked it. Does anyone know what the =
factory setting would be for the Renesis??
=20
Staging is a good point, but I think that you are correct about having =
enough fuel to run a low speeds and not enough to run faster. I was =
running out of fuel and probably didn't have enough to rip it.
=20
You really have good insights when you are helping folks.. You are =
pretty right on with your advice.
=20
Thanks,
Bill B (Must mow yard.Must mow yard..)
-------------------------------------------------------------------------=
-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] =
On Behalf Of Ed Anderson
Sent: Wednesday, October 03, 2007 12:53 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Problem? [FlyRotary] Re: Coolant Water =
Pressure
=20
Yes, too hot for that rpm, I agree.
=20
Assuming you followed the good suggestions offered by Al, Lynn and =
others regarding getting all the air out of the block - really =
important! I almost cooked engines two times because of excess air in =
the coolant system. Here is something that may quickly tell you =
something about the air you may have in the system.
=20
I can't recall what type of radiator set up you have, but with the =
Two GM cores I use which are mounted vertically, you can touch the side =
tank of the radiator and determine if there is air in the system. In my =
case, if I do a complete drain and refill of the system, on the first =
run up the core's tanks will be hot approx 2/3 of the way up and then =
they are much cooler - indicating that the remaining 1/3 of my core is =
filled with air. It generally takes me 3 runups reaching 5000 rpm =
before I can touch the core tanks and find them hot all the way from =
top to bottom. So depending on your radiator set up that might be =
something you can quickly check.
=20
If the mixture is too lean, you can get a backfire out the intake, too =
rich and its generally the exhaust - where unburned fuel cooks off. So =
that and black smoke would indicate to me too rich a mixture. I =
presume you do not have an Air/Fuel ratio indicator - strongly recommend =
you get one, that tells you right away whether you are running rich or =
lean. Even a cheap one can be a tremendous help in finding out whether =
too rich or too lean.
=20
One thing you may want to check is your ignition timing. If using =
Tracy's EC2 you need to set the static timing around 35 Deg BTDC. The =
EC2 backs off 10 deg from that (25Deb BTDC) as its default starting =
point for ignition timing. So if you set the static timing to say 25 =
Deg then the EC2 would be having the engine operate at a 25 - 10 deg =3D =
15 Deg BTDC which is pretty retarded timing for the rotary. OR if you =
set it too far advanced then the timing might be too advanced.
So just recheck it when you get the chance.
=20
Another possibility is your injection system might not be staging =
properly. IF that were the case, the engine might work fine below the =
staging point but not above it. Could possibly be a sticking secondary =
injector (if too rich or lean). But, that is a bit down the likely =
list. Something impeding the fuel flow might provide sufficient fuel =
and low rpm but not sufficient to run at high rpm.
=20
Hope some of this helps
=20
Ed
=20
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://www.andersonee.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda/index.html
=20
=20
=20
=20
=20
=20
----- Original Message -----=20
From: Bill Bradburry=20
To: Rotary motors in aircraft=20
Sent: Wednesday, October 03, 2007 11:23 AM
Subject: [FlyRotary] Re: Problem? [FlyRotary] Re: Coolant Water =
Pressure
=20
Ed, this is at about 2000 rpm. Like a fast idle. I am getting all =
kinds of fuel cut like stoppages if I try to run the engine faster. I =
haven't seen more than about 3700 rpm, but I just started it and have =
not tried to tune anything. I figure I will have to run longer to get =
it tuned and the cooling is holding that back.
=20
Speaking of that, you guys were talking a while back about the =
effects you see when the engine is too lean, or too rich. Talking about =
backfires, etc and what each effect represents. I have forgotten what =
means what.senior days, not moments!
Do any of you remember how that went? I am having some problems =
getting started and am not certain if I am too rich or too lean. I am =
getting backfires out the exhaust at times and smoke from the exhaust at =
that time. (black)
I ran the batteries down yesterday trying to get started due to =
this. When I originally started the engine, I flooded it. I am trying =
to prevent this now and am concerned that I may not be using enough =
mixture.
=20
Bill B
=20
-------------------------------------------------------------------------=
---
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] =
On Behalf Of Ed Anderson
Sent: Wednesday, October 03, 2007 10:05 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Problem? [FlyRotary] Re: Coolant Water Pressure
=20
Bill,=20
=20
You indicate you get overheating after 10-15 minutes run time. I =
may have missed it, but is this at idle, max throttle or what. Also =
what is your OAT. If at idle or low power then, yes what you are seeing =
is not what it should be. On the other hand, if at WOT or high power =
settings, then 10-15 minutes run time would be indication of a great =
cooling capacity. I can not run my engine more than a minute or two at =
WOT on a 80F day without temps getting into the 200F range. But, that =
is at 5800-6000 rpm. At idle, the temps stabilize and I can idle all =
day with safe temps.
=20
My coolant system runs with no air cushion and yes, I get a =
hydraulic "lock" pressure reading of as high as 25 psi immediately upon =
engine start up. After a 30 - 60 seconds of running the pressure drops =
down to zero and then after a few minutes running builds back up as the =
coolant warms up to operating temperatures. =20
=20
Plenty of suggestion have been made about what to check - all good. =
=20
Good luck.
=20
Ed
=20
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://www.andersonee.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda/index.html
----- Original Message -----=20
From: Al Wick=20
To: Rotary motors in aircraft=20
Sent: Wednesday, October 03, 2007 9:30 AM
Subject: [FlyRotary] Re: Coolant Water Pressure
=20
Bill, the definitive test is the one I described below. Really =
encourage you to do it as described. Resist assumptions. Convert your =
ideas to measurements.
=20
-al wick
----- Original Message -----=20
From: Bill Bradburry=20
To: Rotary motors in aircraft=20
Sent: Wednesday, October 03, 2007 6:08 AM
Subject: [FlyRotary] Re: Coolant Water Pressure
=20
I think that I would see air under the radiator cap if I had a =
compression gas leak? I never see any air.=20
To check a piston engine for head gasket leaks, you would put =
the cylinder at TDC and pressurize the cylinder to about 150 lbs with =
compressed air and check the radiator for air bubbles.How do you check a =
rotary?
I will check the pressure sender against a mechanical gage. =20
There is obviously a heating problem, but I think the pressure =
is higher than it should be until just ready to boil. I shut the engine =
off at 210*, and at 22+ lbs, the boiling point should be well above =
250*??
=20
Thanks for the suggestions of where to look, guys.
=20
Bill B
=20
------------------------------------------------------------------------
From: Rotary motors in aircraft =
[mailto:flyrotary@lancaironline.net] On Behalf Of Al p Wick
Sent: Tuesday, October 02, 2007 7:49 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Coolant Water Pressure
=20
Your coolant reservoir should be above engine.=20
=20
1) If it is, remove two cups of air from the reservoir. Then =
repeat your test.=20
2) If you now see pressure rise above 22 psi within 5 minutes of =
cold start, you clearly have compression gases leaking into cooling =
system or bad gage.
=20
3) Air in the block is 10 times more significant than any other =
cooling factor. Make darn sure you don't have any. It causes local =
boiling, high temps, strange behavior.
=20
Operating with two cups of air under cap is an important safety =
and diagnosis advantage. Everyone should do it. With that two cups, you =
only see 22 psi if you have a genuine problem. You only see 0 psi if you =
have genuine problem. The pressure is then a very fast and reliable =
indicator of system integrity. So two cups of air has no negative effect =
on system efficiency, just a substantial improvement in safety. Only =
time it could be a negative would be if your reservoir was way too =
small, way too low, or flowed way too much coolant.
=20
Since you describe high temps AND pressure, I suspect you have =
temperature problem.
=20
I deliberately overheated my engine many times so that I was =
intimate with pressure and temperature patterns. Then tested various =
concepts. Don't recommend you do the same.
=20
-al wick
=20
=20
On Tue, 2 Oct 2007 12:38:55 -0400 "Bill Bradburry" =
<bbradburry@bellsouth.net> writes:
I just recently got my Renesis started again after finishing =
my cowl. I seem to be getting very high coolant pressures. I can only =
run the engine about 10-15 minutes before hitting the redline at 210*. =
My water pressure is at 27 Lbs at that time. I only have a 22 Lb =
radiator cap, so I assume that I am blowing into the recovery tank, but =
I have not confirmed that. My oil temp has never exceeded about 165*. =
It might have gone higher if I could have run longer???
=20
This whole water pressure thing has me a little baffled. =
Since this is a closed system and the only way pressure can build is due =
to the expansion of the coolant after heating???, I am confused by some =
comments that have been made from time to time. I remember something =
that Tracy said about his pressure would build for a time, then go to =
zero. It seems to me that the pressure should correlate to the temp =
pretty closely since it is a closed system??=20
=20
Can someone enlighten me a little on the science of this =
pressure? It seems to me that there could be some pressure build up on =
the positive side of the pump, but it would go negative on the suction =
side, so the net effect of the pump should be close to zero??
=20
Also, my Renesis had only 1800 miles on it when I bought it, =
so I did not have to tear it down. As a result, I am somewhat in the =
dark as to how the water flows through the system. Could someone help =
me with that? I had to remove the thermostat tower for height clearance =
, so I made an adapter plate that takes water from the top outlet of the =
pump and sends it to the radiator (double pass), then from the radiator, =
it returns to the lower inlet of the pump.
=20
Thanks,
Bill B
=20
-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable valve lift =
and cam timing.=20
Artificial intelligence in cockpit, N9032U 240+ hours from =
Portland, Oregon
Glass panel design, Subaru install, Prop construct, Risk =
assessment info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
-Al Wick
Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and =
cam timing.=20
Artificial intelligence in cockpit, N9032U 240+ hours from =
Portland, Oregon
Glass panel design, Subaru install, Prop construct, Risk =
assessment info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
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<DIV><FONT face=3DArial>Grass? what grass? {:>)</FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial>Yes, it sounds like the air should rise to the =
top of your=20
slanted radiator. However, My experience has been that unless I =
run the=20
engine up to around 5000 rpm for about 15-30 seconds (does not have =
to be=20
long) that I do not have much success getting air out of the =
block. It=20
seems to take that velocity of coolant flow to drag the water out of the =
block.</FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial>You have over 700 cubic inches of core, so that =
should be=20
plenty for cooling a two rotor. </FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial>A multi pass radiator (two pass in your case) =
can require=20
more coolant pump flow as indicated by this extract from a pretty =
respected name=20
in racing/cooling circles:</FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial> <FONT color=3D#ffffff><FONT =
size=3D2>Double pass=20
</FONT></FONT><FONT color=3D#000000 size=3D2><EM>Double pass radiators =
require 16x=20
more pressure to flow the same volume of coolant through them, as =
compared to a=20
single pass radiator. Triple pass radiators require 64x more pressure to =
maintain the same volume. Automotive water pumps are a centrifugal =
design, not=20
positive displacement, <FONT color=3D#ff0000>so with a double pass =
radiator, the=20
pressure is doubled and flow is reduced by approximately 33%. Modern =
radiator=20
designs, using wide/thin cross sections tubes, seldom benefit from =
multiple pass=20
configurations.</FONT> The decrease in flow caused by multiple passes =
offsets=20
any benefits of a high-flow water pump.</EM></FONT></FONT></DIV>
<DIV><FONT face=3DArial><FONT color=3D#000000=20
size=3D2><EM></EM></FONT></FONT> </DIV>
<DIV><FONT face=3DArial><FONT color=3D#000000 size=3D2><FONT=20
size=3D3> </FONT></FONT></FONT><FONT face=3DArial></FONT></DIV>
<DIV><FONT face=3DArial>Again, these are just back of the envelope =
calculations=20
based on a great deal of assumption about your parameters. My gut =
feel is=20
that 700 cubic inches should have no problem cooling your installation =
at those=20
power settings even being a double pass radiator. So I would look =
else=20
where.</FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial> You indicate you have an approx. 80F delta =
T across=20
your radiator core with the coolant temp a 210F. You have a fan =
which=20
apparently has the spec to draw 970 CFI across the 11" dia of the =
Fan. =20
Lets assume that was the flow through the entire core. Then that =
would=20
give you 970*.0765 =3D 74 lbm/min of air mass.</FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial>Q =3D 75 * .25 * 80 =3D 1500 BTU/Min just due to =
the flow=20
resulting from your fan - it would seem that plus whatever flow you are =
getting=20
from your prop - Prop??. </FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial>Hey, this dumb question just occurred to =
me=20
- I assume you are running with a prop?? in a tractor=20
configuration. I lose track of who has what.</FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial>Ed</FONT></DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial></FONT> </DIV>
<DIV><FONT face=3DArial><FONT color=3D#000000 size=3D2><FONT=20
size=3D3></FONT></FONT></FONT> </DIV>
<DIV><FONT face=3DArial><FONT color=3D#000000 size=3D2><FONT=20
size=3D3></FONT> </DIV>
<DIV><EM><BR></EM></DIV></FONT></FONT>
<DIV><FONT face=3DArial></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dbbradburry@bellsouth.net =
href=3D"mailto:bbradburry@bellsouth.net">Bill=20
Bradburry</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dflyrotary@lancaironline.net=20
href=3D"mailto:flyrotary@lancaironline.net">Rotary motors in =
aircraft</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, October 03, =
2007 5:12=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [FlyRotary] Re: =
Problem?=20
[FlyRotary] Re: Coolant Water Pressure</DIV>
<DIV><BR></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I have an =
aluminum=20
double pass radiator with the finned core size of about 18.25 X 18.25 =
X=20
2.25. It is behind the engine and leaning rearward at the top at =
about a=20
30-35* angle. The water from the engine enters on the left lower =
and=20
crosses the bottom half of the radiator to the right side then rises =
and goes=20
back across the top of the radiator and exits the top left side and =
returns to=20
the engine.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">My radiator =
cap is at=20
the top right corner of the radiator at the point where the water =
starts its=20
second pass through the top half. My pressure port is just below =
the=20
radiator cap. The pressure sending unit is in a =93T=94 with the =
hose which=20
goes to the =BC=94 port at the top of the rear iron connected to the =
other side of=20
the =93T=94. I thought that this hose could have some effect on =
the=20
pressure, but I am not certain why it =
would.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Any air in =
the system=20
should either rise to the top of the radiator, or if it was trapped in =
the=20
block, it could come through the hose to the radiator. All air =
should be=20
found therefore? Under the radiator cap. I have never found any =
air=20
there.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I think I =
found out a=20
little something about the fuel system today. I only put a few =
gallons=20
in the right tank and have been checking for leaks and running the =
engine on=20
this fuel. I wanted to run it down to the =93non-usable=94 level =
and then do=20
the same thing with the left tank. So I have been really low on=20
fuel. My pressure has been holding, but I thought that I could =
hear=20
bubbles from time to time going through the=20
lines.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Anyway, =
before, I=20
could get a good start by setting the mixture at about 4 PM oclock and =
it=20
would fire up in a couple of blades. Today, I tried hitting the =
primer=20
button a couple of times and it would start and immediately die. =
I=20
finally had to set the cold start on and leave it on just to get the =
engine to=20
run! Finally after it warmed up, it ran with the mixture set at =
12=20
oclock, but it was not steady. As my fuel ran out, the pressure =
dropped=20
finally to about 28 lbs and the engine started its death rattle. =
I shut=20
it off at that time.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The =
temperature had=20
risen to 210* the ambient temp was 87-88* and the air after the =
radiator was=20
168* This is with my radiator fan running. (11=94 and 970 =
CFM)=20
probably about 10-12 minutes of running the=20
engine<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">My oil temp =
was only=20
160* and the air temp after the oil cooler was 145* , I think that =
this would=20
gone higher if I ran longer, because the oil in the pan was up to =
170-180* or=20
so. The pan holds 5 qts, 8 qts in the=20
system.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Water =
pressure was up=20
to 22-23 lbs and oil pressure was 70 lbs.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">All my temp =
probes=20
are within a degree or so of one another and with a mercury =
thermometer in the=20
hangar when reading ambient temp and the engine is cold. I think =
they=20
are all correct.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I have the =
air/fuel=20
ratio setup that comes with the EM-2, but it doesn=92t work till the =
O2 sensor=20
gets to about 800* or so, no help on trying to figure out starting=20
ratio.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The timing =
brings up=20
a good point. I got the Renesis out of a wrecked car with 1800 =
miles on=20
it, so the timing is set to the factory setting for the Renesis. =
I have=20
never checked it. Does anyone know what the factory setting =
would be for=20
the Renesis??<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Staging is =
a good=20
point, but I think that you are correct about having enough fuel to =
run a low=20
speeds and not enough to run faster. I was running out of fuel =
and=20
probably didn=92t have enough to rip it.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">You really =
have good=20
insights when you are helping folks.. You are pretty right on with =
your=20
advice.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Thanks,<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Bill =
B (Must=20
mow yard=85Must mow yard..)<o:p></o:p></SPAN></FONT></P>
<DIV>
<DIV class=3DMsoNormal style=3D"TEXT-ALIGN: center" =
align=3Dcenter><FONT=20
face=3D"Times New Roman" size=3D3><SPAN style=3D"FONT-SIZE: 12pt">
<HR tabIndex=3D-1 align=3Dcenter width=3D"100%" SIZE=3D2>
</SPAN></FONT></DIV>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">From:</SPAN></FONT></B><FONT=20
face=3DTahoma size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">=20
<st1:PersonName w:st=3D"on">Rotary motors in aircraft</st1:PersonName> =
[mailto:flyrotary@lancaironline.net] <B><SPAN style=3D"FONT-WEIGHT: =
bold">On=20
Behalf Of </SPAN></B>Ed Anderson<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Wednesday, October 03, =
2007 12:53=20
PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> =
<st1:PersonName=20
w:st=3D"on">Rotary motors in aircraft</st1:PersonName><BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> [FlyRotary] Re: =
Problem?=20
[FlyRotary] Re: Coolant Water =
Pressure</SPAN></FONT><o:p></o:p></P></DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Yes, too hot for that =
rpm, I=20
agree.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Assuming you =
followed the=20
good suggestions offered by Al, Lynn and others regarding getting all =
the air=20
out of the block - really important! I almost cooked engines two =
times=20
because of excess air in the coolant system. Here is something=20
that may quickly tell you something about the air you may have =
in the=20
system.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial"> I can't recall =
what type of=20
radiator set up you have, but with the Two GM cores I use which =
are=20
mounted vertically, you can touch the side tank of the radiator =
and=20
determine if there is air in the system. In my case, =
if I do a=20
complete drain and refill of the system, on the first run up the =
core's tanks=20
will be hot approx 2/3 of the way up and then they are much =
cooler -=20
indicating that the remaining 1/3 of my core is filled with air. =
It=20
generally takes me 3 runups reaching 5000 rpm before I can =
touch =20
the core tanks and find them hot all the way from top to =
bottom. So=20
depending on your radiator set up that might be something you can =
quickly=20
check.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">If the mixture is too =
lean, you=20
can get a backfire out the intake, too rich and its generally the =
exhaust -=20
where unburned fuel cooks off. So that and black smoke would =
indicate to=20
me too rich a mixture. I presume you do not have an =
Air/Fuel ratio=20
indicator - strongly recommend you get one, that tells you right away =
whether=20
you are running rich or lean. Even a cheap one can be a =
tremendous help=20
in finding out whether too rich or too=20
lean.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">One thing you may want =
to check is=20
your ignition timing. If using <st1:City w:st=3D"on"><st1:place=20
w:st=3D"on">Tracy</st1:place></st1:City>'s EC2 you need to set the =
static timing=20
around 35 Deg BTDC. The EC2 backs off 10 deg from that (25Deb =
BTDC) as=20
its default starting point for ignition timing. So if you set =
the static=20
timing to say 25 Deg then the EC2 would be having the engine operate =
at a 25 -=20
10 deg =3D 15 Deg BTDC which is pretty retarded timing for the =20
rotary. OR if you set it too far advanced then the timing might =
be too=20
advanced.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">So just recheck it when =
you get=20
the chance.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Another possibility is =
your=20
injection system might not be staging properly. IF that were the =
case,=20
the engine might work fine below the staging point but not above =
it. =20
Could possibly be a sticking secondary injector (if too rich or=20
lean). But, that is a bit down the likely list. =
Something=20
impeding the fuel flow might provide sufficient fuel and low rpm but =
not=20
sufficient to run at high rpm.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Hope some of this=20
helps</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =
Arial">Ed</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Ed Anderson<BR>Rv-6A =
N494BW Rotary=20
Powered<BR>Matthews, NC<BR><A=20
=
href=3D"mailto:eanderson@carolina.rr.com">eanderson@carolina.rr.com</A><B=
R><A=20
href=3D"http://www.andersonee.com">http://www.andersonee.com</A><BR><A =
=
href=3D"http://members.cox.net/rogersda/rotary/configs.htm#N494BW">http:/=
/members.cox.net/rogersda/rotary/configs.htm#N494BW</A><BR><A=20
=
href=3D"http://www.dmack.net/mazda/index.html">http://www.dmack.net/mazda=
/index.html</A></SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: =
medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt =
3.75pt; BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: =
medium none">
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">----- Original Message =
-----=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV style=3D"font-color: black">
<P class=3DMsoNormal style=3D"BACKGROUND: #e4e4e4"><B><FONT =
face=3DArial=20
size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">From:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> <A=20
title=3Dbbradburry@bellsouth.net =
href=3D"mailto:bbradburry@bellsouth.net">Bill=20
Bradburry</A> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">To:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> <A=20
title=3Dflyrotary@lancaironline.net=20
href=3D"mailto:flyrotary@lancaironline.net">Rotary motors in =
aircraft</A>=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Sent:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">=20
Wednesday, October 03, 2007 11:23 =
AM<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Subject:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">=20
[FlyRotary] Re: Problem? [FlyRotary] Re: Coolant Water=20
Pressure<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P></DIV>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Ed, this =
is at=20
about 2000 rpm. Like a fast idle. I am getting all kinds =
of fuel=20
cut like stoppages if I try to run the engine faster. I =
haven=92t seen=20
more than about 3700 rpm, but I just started it and have not tried =
to tune=20
anything. I figure I will have to run longer to get it tuned =
and the=20
cooling is holding that back.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Speaking =
of that,=20
you guys were talking a while back about the effects you see when =
the engine=20
is too lean, or too rich. Talking about backfires, etc and =
what each=20
effect represents. I have forgotten what means what=85senior =
days, not=20
moments!<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Do any of =
you=20
remember how that went? I am having some problems getting =
started and=20
am not certain if I am too rich or too lean. I am getting =
backfires=20
out the exhaust at times and smoke from the exhaust at that time.=20
(black)<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I ran the =
batteries=20
down yesterday trying to get started due to this. When I =
originally=20
started the engine, I flooded it. I am trying to prevent this =
now and=20
am concerned that I may not be using enough=20
mixture.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Bill=20
B<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<DIV class=3DMsoNormal style=3D"TEXT-ALIGN: center" =
align=3Dcenter><FONT=20
face=3D"Times New Roman" size=3D3><SPAN style=3D"FONT-SIZE: 12pt">
<HR tabIndex=3D-1 align=3Dcenter width=3D"100%" SIZE=3D2>
</SPAN></FONT></DIV>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">From:</SPAN></FONT></B><FONT=20
face=3DTahoma size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">=20
<st1:PersonName w:st=3D"on">Rotary motors in =
aircraft</st1:PersonName>=20
[mailto:flyrotary@lancaironline.net] <B><SPAN style=3D"FONT-WEIGHT: =
bold">On=20
Behalf Of </SPAN></B>Ed Anderson<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Wednesday, October 03, =
2007 10:05=20
AM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> =
<st1:PersonName=20
w:st=3D"on">Rotary motors in aircraft</st1:PersonName><BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> [FlyRotary] Problem? =
[FlyRotary] Re: Coolant Water =
Pressure</SPAN></FONT><o:p></o:p></P></DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Bill,=20
</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">You indicate you get =
overheating=20
after 10-15 minutes run time. I may have missed it, but is =
this at=20
idle, max throttle or what. Also what is your OAT. If at =
idle or=20
low power then, yes what you are seeing is not what it should =
be. On=20
the other hand, if at WOT or high power settings, then 10-15 minutes =
run=20
time would be indication of a great cooling capacity. I can =
not run my=20
engine more than a minute or two at WOT on a 80F day without temps =
getting=20
into the 200F range. But, that is at 5800-6000 rpm. At =
idle, the=20
temps stabilize and I can idle all day with safe=20
temps.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">My coolant system runs =
with no=20
air cushion and yes, I get a hydraulic "lock" pressure reading of as =
high as=20
25 psi immediately upon engine start up. After a 30 - 60 =
seconds of=20
running the pressure drops down to zero and then after a =
few=20
minutes running builds back up as the coolant warms up to operating=20
temperatures. </SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Plenty of suggestion =
have been=20
made about what to check - all good. =20
</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Good=20
luck.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =
Arial">Ed</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">Ed Anderson<BR>Rv-6A =
N494BW=20
Rotary Powered<BR>Matthews, NC<BR><A=20
=
href=3D"mailto:eanderson@carolina.rr.com">eanderson@carolina.rr.com</A><B=
R><A=20
=
href=3D"http://www.andersonee.com">http://www.andersonee.com</A><BR><A=20
=
href=3D"http://members.cox.net/rogersda/rotary/configs.htm#N494BW">http:/=
/members.cox.net/rogersda/rotary/configs.htm#N494BW</A><BR><A=20
=
href=3D"http://www.dmack.net/mazda/index.html">http://www.dmack.net/mazda=
/index.html</A></SPAN></FONT><o:p></o:p></P></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: =
medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt =
3.75pt; BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: =
medium none">
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">----- Original =
Message -----=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV style=3D"font-color: black">
<P class=3DMsoNormal style=3D"BACKGROUND: #e4e4e4"><B><FONT =
face=3DArial=20
size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">From:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> <A=20
title=3Dalwick@juno.com href=3D"mailto:alwick@juno.com">Al =
Wick</A>=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">To:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> <A=20
title=3Dflyrotary@lancaironline.net=20
href=3D"mailto:flyrotary@lancaironline.net">Rotary motors in =
aircraft</A>=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Sent:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">=20
Wednesday, October 03, 2007 9:30 =
AM<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Subject:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">=20
[FlyRotary] Re: Coolant Water =
Pressure<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: =
12pt"><o:p> </o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Bill, the definitive =
test is=20
the one I described below. Really encourage you to do it as =
described.=20
Resist assumptions. Convert your ideas to=20
measurements.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">-al=20
wick</SPAN></FONT><o:p></o:p></P></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; =
BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0in; MARGIN: =
5pt 0in 5pt 3.75pt; BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0in; =
BORDER-BOTTOM: medium none">
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">----- Original =
Message -----=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV style=3D"font-color: black">
<P class=3DMsoNormal style=3D"BACKGROUND: #e4e4e4"><B><FONT =
face=3DArial=20
size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">From:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; =
FONT-FAMILY: Arial"> <A=20
title=3Dbbradburry@bellsouth.net=20
href=3D"mailto:bbradburry@bellsouth.net">Bill Bradburry</A>=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">To:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; =
FONT-FAMILY: Arial"> <A=20
title=3Dflyrotary@lancaironline.net=20
href=3D"mailto:flyrotary@lancaironline.net">Rotary motors in =
aircraft</A>=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Sent:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; =
FONT-FAMILY: Arial">=20
Wednesday, October 03, 2007 6:08 =
AM<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><B><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Subject:</SPAN></FONT></B><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; =
FONT-FAMILY: Arial">=20
[FlyRotary] Re: Coolant Water=20
Pressure<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"><o:p> </o:p></SPAN></FONT></P></DIV>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I =
think that I=20
would see air under the radiator cap if I had a compression gas=20
leak? I never see any air. <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">To =
check a=20
piston engine for head gasket leaks, you would put the cylinder =
at TDC=20
and pressurize the cylinder to about 150 lbs with compressed air =
and=20
check the radiator for air bubbles=85How do you check a=20
rotary?<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I =
will check=20
the pressure sender against a mechanical gage. =20
<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">There =
is=20
obviously a heating problem, but I think the pressure is higher =
than it=20
should be until just ready to boil. I shut the engine off =
at 210*,=20
and at 22+ lbs, the boiling point should be well above=20
250*??<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Thanks for the=20
suggestions of where to look, =
guys=85<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Bill=20
B<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy =
size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<DIV class=3DMsoNormal style=3D"TEXT-ALIGN: center" =
align=3Dcenter><FONT=20
face=3D"Times New Roman" size=3D3><SPAN style=3D"FONT-SIZE: =
12pt">
<HR tabIndex=3D-1 align=3Dcenter width=3D"100%" SIZE=3D2>
</SPAN></FONT></DIV>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">From:</SPAN></FONT></B><FONT=20
face=3DTahoma size=3D2><SPAN style=3D"FONT-SIZE: 10pt; =
FONT-FAMILY: Tahoma">=20
<st1:PersonName w:st=3D"on">Rotary motors in =
aircraft</st1:PersonName>=20
[mailto:flyrotary@lancaironline.net] <B><SPAN=20
style=3D"FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Al p =
Wick<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, October =
02, 2007=20
7:49 PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B>=20
<st1:PersonName w:st=3D"on">Rotary motors in=20
aircraft</st1:PersonName><BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> [FlyRotary] Re: =
Coolant=20
Water Pressure</SPAN></FONT><o:p></o:p></P></DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">Your coolant reservoir should be above =
engine.=20
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">1) If it is, remove two cups of air =
from the=20
reservoir. Then repeat your test. =
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">2) If you now see pressure rise =
above 22=20
psi within 5 minutes of cold start, you clearly have compression =
gases=20
leaking into cooling system or bad=20
gage.<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">3) Air in the block is 10 times more =
significant=20
than any other cooling factor. Make darn sure you don't have =
any. It=20
causes local boiling, high temps, strange=20
behavior.<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">Operating with two cups of air under =
cap is an=20
important safety and diagnosis advantage. Everyone should do it. =
With=20
that two cups, you only see 22 psi if you have a genuine =
problem. You=20
only see 0 psi if you have genuine problem. The pressure is then =
a very=20
fast and reliable indicator of system integrity. So two cups of =
air has=20
no negative effect on system efficiency, just a substantial =
improvement=20
in safety. Only time it could be a negative would be if your =
reservoir=20
was way too small, way too low, or flowed way too much=20
coolant.<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">Since you describe high temps AND =
pressure, I=20
suspect you have temperature =
problem.<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">I deliberately overheated my engine =
many times=20
so that I was intimate with pressure and temperature patterns.=20
Then tested various concepts. Don't recommend you do the=20
same.<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">-al =
wick<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">On Tue, 2 Oct 2007 12:38:55 -0400 =
"Bill=20
Bradburry" <<A=20
=
href=3D"mailto:bbradburry@bellsouth.net">bbradburry@bellsouth.net</A>>=
=20
writes:<o:p></o:p></SPAN></FONT></P></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; =
BORDER-TOP: medium none; MARGIN-TOP: 5pt; PADDING-LEFT: 8pt; =
MARGIN-BOTTOM: 5pt; PADDING-BOTTOM: 0in; MARGIN-LEFT: 7.5pt; =
BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: medium =
none">
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I just recently =
got my=20
Renesis started again after finishing my cowl. I seem to =
be=20
getting very high coolant pressures. I can only run the =
engine=20
about 10-15 minutes before hitting the redline at 210*. =
My water=20
pressure is at 27 Lbs at that time. I only have a 22 Lb =
radiator=20
cap, so I assume that I am blowing into the recovery tank, but =
I have=20
not confirmed that. My oil temp has never exceeded about =
165*. It might have gone higher if I could have run=20
longer???<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">This whole water =
pressure=20
thing has me a little baffled. Since this is a closed =
system and=20
the only way pressure can build is due to the expansion of the =
coolant=20
after heating???, I am confused by some comments that have =
been made=20
from time to time. I remember something that <st1:place=20
w:st=3D"on"><st1:City w:st=3D"on">Tracy</st1:City></st1:place> =
said about=20
his pressure would build for a time, then go to zero. It =
seems=20
to me that the pressure should correlate to the temp pretty =
closely=20
since it is a closed system?? <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Can someone =
enlighten me a=20
little on the science of this pressure? It seems to me =
that=20
there could be some pressure build up on the positive side of =
the=20
pump, but it would go negative on the suction side, so the net =
effect=20
of the pump should be close to =
zero??<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Also, my Renesis =
had only=20
1800 miles on it when I bought it, so I did not have to tear =
it=20
down. As a result, I am somewhat in the dark as to how =
the water=20
flows through the system. Could someone help me with =
that? =20
I had to remove the thermostat tower for height clearance , so =
I made=20
an adapter plate that takes water from the top outlet of the =
pump and=20
sends it to the radiator (double pass), then from the =
radiator, it=20
returns to the lower inlet of the =
pump.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Thanks,<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Bill=20
B<o:p></o:p></SPAN></FONT></P>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"> <o:p></o:p></SPAN></FONT></P></DIV></BLOCKQUOTE>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"><BR>-al wick<BR>Cozy IV powered by =
Turbo Subaru=20
3.0R with variable valve lift and cam timing. <BR>Artificial=20
intelligence in cockpit, N9032U 240+ hours from <st1:place=20
w:st=3D"on"><st1:City w:st=3D"on">Portland</st1:City>, =
<st1:State=20
w:st=3D"on">Oregon</st1:State></st1:place><BR>Glass panel =
design, Subaru=20
install, Prop construct, Risk assessment=20
=
info:<BR>http://www.maddyhome.com/canardpages/pages/alwick/index.html<o:p=
></o:p></SPAN></FONT></P></BLOCKQUOTE>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt">-Al Wick<BR>Cozy IV powered by Turbo =
Subaru 3.0R=20
with variable valve lift and cam timing. <BR>Artificial =
intelligence in=20
cockpit, N9032U 240+ hours from <st1:place w:st=3D"on"><st1:City=20
w:st=3D"on">Portland</st1:City>, <st1:State=20
w:st=3D"on">Oregon</st1:State></st1:place><BR>Glass panel design, =
Subaru=20
install, Prop construct, Risk assessment info:<BR><A=20
=
href=3D"http://www.maddyhome.com/canardpages/pages/alwick/index.html">htt=
p://www.maddyhome.com/canardpages/pages/alwick/index.html</A><o:p></o:p><=
/SPAN></FONT></P></DIV></BLOCKQUOTE></BLOCKQUOTE></DIV></BLOCKQUOTE></BOD=
Y></HTML>
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