I went thru and
cleaned up all my grounds and it seems to have fixed everything with the
exception of the hiccup.
Tracy, have you
finished the bench testing on the EC-2 upgrade yet? I would really
like to try and see if that will fix this problem. My wife really
doesn’t like that hiccup!
Bill
B
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill
Bradburry
Sent:
Saturday, December 08, 2012 3:41 PM
To: Rotary motors in
aircraft
Subject: [FlyRotary] Re: Aeroquip
hose
I currently
have a separate ground from each of the batteries to a Nuckolls “forest
of tabs” ground point. Everything inside the cockpit grounds
here. Also the fuel pumps and injectors ground here. The
coils ground on the center iron. There are separate grounds from
each battery to the PSRU plate on each side of the starter. I have
considered bringing two separate grounds from the center iron to the
batteries just in case there is resistance getting from the center iron
to the PSRU plate.
I am also
taking all my grounds apart to check for corrosion or anything that
seems that it might not be properly
bonded.
I am doing this
for two reasons. One, I am still getting that occasional “hiccup”
that is violent enough to shake the plane when it happens. It is
bad enough that I am concerned that it might be bad for the pin in the
PSRU. I am also wondering if it could be the PSRU that has sheared
the pin and is slipping? Someone on here had that happen and I
would really appreciate a description of what that sounded and felt like
and also how I could make certain that is not the problem. No, I
don’t want to dismantle the PSRU to check it unless that seems to be the
only way to check it.
Also,
Tracy, how are you progressing on getting
the upgrade for the EC-2 that might fix this hiccup if that is what it
is? I think you had it done for the EC-3 and were working on the
EC-2 implementation??
The second
reason for going thru the grounds is that I am having an intermittent
problem with my GTX327 transponder, MFD150 moving map, and TruTrak
autopilot shutting down. This seems to happen more often when I
key the mike on my GNS430W radio, but keying the mike is not
required. It sometimes happens just out of the blue. Also
most of the time, only the transponder shuts off. Only sometimes
does the moving map and autopilot join in the
fun.
Everybody tells
me that it sounds like a ground issue, hence I am going thru the ground
system.
I welcome all
opinions and input!
Bill
B
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of
Tracy
Sent: Saturday, December 08, 2012
10:56 AM
To:
Rotary motors in aircraft
Subject: [FlyRotary] Re: Aeroquip
hose
Tying the engine
parts together should not be necessary but you still need a separate
ground from battery to airframe ground (if metal) and your avionics
ground point. Also separate feeds from +12 battery to
starter/alternator and avionics. You can Use the
starter/alternator feed for coils, injectors & fuel pumps to keep
noise down on the avionics bus.
Tracy
On Sat, Dec 8, 2012 at 12:23 AM, Bill
Bradburry <bbradburry@bellsouth.net>
wrote:
Several months
ago, after a discussion with Tracy, I ran
grounding straps from each battery to the PSRU plate on both sides of
the starter mount. I had previously had the grounding strap
running between the center iron and the “forest of tabs” grounding block
on the firewall. Tracy suggested I
move it so the starter amps would not get into the grounding
block.
Now I have the
igniters grounded on the center iron and I am considering running a
ground strap from the center iron to the batteries or trying to tie each
section of the engine “sandwich” together by running a wire between
them. This would to be certain that the ground is good on the
igniters.
Any opinions on
this??
Bill
B
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Andrew
Martin
Sent: Friday,
December 07, 2012 8:29 PM
To: Rotary motors in
aircraft
Subject: [FlyRotary] Re: Aeroquip
hose
Bill
As Mark says + make sure you have a
ground cable/strap connected battery direct to your starter. Do not
expect starter to ground through your engine without problems.
I
remember Tracy posting on this issue years
ago just a bit hard to find in the archives
now.
Andrew
On Sat, Dec 8, 2012 at 7:26 AM, Mark Steitle
<msteitle@gmail.com>
wrote:
Bill,
You may want to check your engine ground.
Starter current may be causing
this.
On Fri, Dec 7, 2012 at 5:12 PM, Bill
Bradburry <bbradburry@bellsouth.net>
wrote:
I am working on cleaning up my ground system and
I noticed that I have
several, 3 or 4, places on my SS braided fuel
hose that appears to be burnt
like it had an electrical spark exit
from it. I have not found anything in
the vicinity of these
places that look like where the spark? would have
jumped??
Has
anyone seen something like this and what should I do about it? Do
I
have a ground problem in the engine compartment or is this maybe
static?
The hoses are covered by SS and are connected on one end to a
filter that
has a ground strap on it and on the other end to the fuel
rail which is
grounded to the engine.
Bill
B
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