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Ha! We were pretty much on the same
page! :>)
B2
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Sir Luck
Sent: Wednesday, January 09, 2013
12:37 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Aeroquip
hose changed to hiccup
Virtual Reality?? (Sorry, I couldn't resist).
On Wed, Jan 9, 2013 at 12:20 PM, Bill
Bradburry <bbradburry@bellsouth.net> wrote:
I am currently at a loss as to what a “VR sensor” would be??
B2
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
On Behalf Of Ernest Christley
Sent: Wednesday, January 09, 2013
9:38 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Aeroquip
hose changed to hiccup
A problem that
mimics a poorly wired VR sensor, but
-only happens
occasionally,
-with various
levels of "response"
Bill, if you
haven't done so already, I would suggest changing the wiring to the VR sensor
completely. It sounds to me like a textbook example of the worst sort of
electronic malfunction you can have…an intermittent open. You'll never
find it under normal test conditions, and it will manifest at the most
inopportune times. The only way to completely rule it out as a failure
scenario is to completely replace the circuit path.
On Jan 8, 2013, at
11:42 PM, Bill Bradburry wrote:
No, I have the 2.85 gearbox. I have the MT electric prop, so
I fly WOT and use the prop to govern the engine speed.
I have changed the plugs with no effect. The mixture is fine
when this is happening. Fuel pressure also. I had an incident once
on take off like you describe where the plane was backfiring like crazy just
after I lifted off. I had the mixture too rich. I dialed it back
and everything smoothed out. This is different. It doesn’t really
backfire. It is a thump and it jerks the engine and plane. You can
hear and feel it. It seems to be a single thump and it has varying
degrees of violence. Some are just a little miss and some are so bad it
shakes everything. These are less frequent, but they are bad enough that
I don’t think they are good for the PSRU, prop, or engine mount.
That is why I have been bugging Tracy about the change for the EC-2. I
have my fingers crossed that this will fix it. :>)
Bill B
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