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Brian,
Bill Eslick had a power loss that I think
he feels was due to a Hushpower guts blocking the exhaust. He had an
emergency landing as a result. I had a Hushpower on my plane, but just
changed it out to a DNA muffler. My Hushpower seems to be still in ok
shape structurally, but it is full of something loose that rattles when you
shake it. It only has 30-40 hours on it. Only 23 flight hours.
Bill
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of bktrub@aol.com
Sent: Wednesday, May 16, 2012
12:26 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: High EGTs
And I am running a Hushpower, I run a
bore scope up it today and the exit cone looked completely intact. No way to
check out the entrance cone without taking the exhuast system apart,
which is possible but a PITA. Is a Hushpower considered restrictive?
-----Original
Message-----
From: Bill Bradburry <bbradburry@bellsouth.net>
To: Rotary motors in aircraft
<flyrotary@lancaironline.net>
Sent: Tue, May 15, 2012 8:38 pm
Subject: [FlyRotary] Re: High EGTs
Now you have gotten me concerned! I
changed the muffler and that didn’t seem to have any effect on the EGTs,
so I don’t think that is the cause, but I don’t want to damage any
orings. What were the temps you were seeing when the orings were damaged?
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Tuesday, May 15, 2012 10:18
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: High EGTs
I had high EGT's at one time. Turns
out it was due to an overly restrictive muffler. The high EGT's damaged
the o-rings resulting in an engine overhaul. Could this possibly be at
the root of your high EGT readings?
My engine is now running just the way it
should, temps were 180 or lower on a 75 degree day, but my EGTs have always
been high, really high- above 1800 almost all the time. I think it may be a
calibration issue. My egt sensors are about 3 inches downstream of the exhaust
ports, and I am using Tracy's
EM2, calibrated at the stock settings. When the engine is stone cold, the egt's
read about 230 degrees, which I assume is normal because the sensors are meant
to operate at a much higher temperature. Any thoughts?
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