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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: The times that test men  was [FlyRotary] Just livid.....
Date: Sat, 25 Jul 2009 20:37:20 -0400
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Hi Chris, what's that old saying about "...If I didn't have bad luck, I
would have no luck at all!....".

Clearly, its dismaying to leave a fine running engine, do nothing but let
some time pass and then find out the engine now has problems - have you ever
heard of gremlins?

It certainly difficult to say what may have cause the fuel puddle especially
considering all your fuel plumbing has been checked with nothing found
amiss.

A couple of things come to mind - there was a leak - perhaps ambient heat
caused a fitting to expand a bit causing it and contract in cooler temps
(wild theory I know).  Possibly you missed it - small leaks can be pretty
hard to find.  I take a piece of white paper and wipe down all fuel lines,
if there is any fuel leaking it will show up on the paper.

It could be fuel pumped out of the combustion chamber by repeated attempt to
start the engine and out the exhaust - not a normal thing, but can happened.

Another possibility is your injectors may not be seating properly in the
fuel rail.  Sometimes the "O" ring just doesn't seat properly, gets worn,
had damage, etc.  That can cause a leak.  When the fuel pump is on and the
pressure is high in the line, the pressure causes the "O" ring to seat -
but, you turn off the pump the pressure decreases, the "O" ring unseats
slightly and fuel leaks out.  You turn on the pumps in an attempt to find
the leak and nada - because the pressure is now causing the "O" ring to
seal.  What is even worst, the "O" ring may not unseat each time you turn
the pump off - so it may not happen every time.

I recall someone else having problems with one controller and it turned out
the chip was not fully seated.  I recently read a report sent to me by
another member of this list that the PLLC type of chip socket used in the
EC2 can (rarely but apparently happens often enough to have gotten diagnosed
in some electronic applications) even force the chip off its connections
through the build up of gas pockets in the plastic of the socket due to
heat.  This is undoubtedly pretty wild - but you said to include the wild
{:>).   

Given that you found the ground wire to the EC2 broken is a pretty
significant find.  It first makes me wonder what routes the electrons took
through the EC2 to a ground, if the proper ground was not available.  Not
certain but if it were operated without the designated ground, then that
might explain why the A controller is causing problems.  Always the
potential that some current flowing where it shouldn't or in amounts that it
shouldn't could corrupt memory cells.  Again a bit wild, but it has
happened.

If you have an EM2, then I would examine the MCT (fuel map)to see if there
is any evidence of it being corrupted.

Good luck, Chris - you would do with a bit.

Ed

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Christopher Barber
Sent: Saturday, July 25, 2009 8:03 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Just livid.....

I have not worked on my engine or electrics in over a week.  Last time I 
ran the engine it ran so well, I wanted to taxi over and pull a first 
flight.  NOT a good idea without wings or a canard.

Since then, since the airport is about to force us onto the ramp out of 
our nice, comfortable hangar in order to repair the roof from damage 
from Hurricane Ike, I have been refinishing the strakes.  I got them 
sealed up a while back, but I blew off the micro and primer finishing 
since I wanted to focus on the engine.  Finished the UV primer yesterday 
and they look good and should be good enough to protect from the 
elements for a bit.

So, I go out today and start the engine.  I have NOT TOUCHED anything 
with the engine or electrics in more than a week, it is not starting.  
Crap. WHAT!!!!! The dreaded NOS!!! CRAP X 10.  Whats up with that?  Got 
out, looked under the engine and there was a big puddle of FUEL.  
Checked all lines.  Turned on pumps, checked lines etc and could find 
nothing.

I looked at the wires to the ECU and all was secure, EXCEPT, I notice my 
main (16gage) ground wire broke at the connector at the ECU.  Repaired 
the wire.

 I moved the plane and for grins tried to start again.  It begrudenly 
started and ran really badly.  I switched to B and it ran much better. 
Back to A, terrible.  I got out and cautiously checked for the leak.  
NONE found.  I shut down and worked on other stuff in disgust.

I HAVE NOT TOUCHED ANYTHING TO DO WITH THE ENGINE/ ELECTRICS  since it 
ran well last week.  WHATS UP?  Thoughts, opinions and Wild a@$ guesses 
are sought and appreciated.

Thanks.

All the best,

Chris
Houston

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