Chris,
How long did you run with low oil
pressure/no oil? The oil cools the rotors, a lack of it could have
overheated them and weakened the springs??
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Chris Barber
Sent: Friday, January 14, 2011
8:19 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Apex seal
update cont with pix of rotor andapexseals
I am premixing.
Also, I am only using three lbs of boost.
I was under the impression that this low of boost should not be a
problem. I know there are many other possible causes and will be
investigating.
I may start by putting in a lower boost spring
in the waste gate (1.5 lbs) but I am not really thinking this is the
issue. Perhaps timing, as I did play with it quite a bit before I sent
my EC2 to Tracy
for a check and update. My higher power tests were quite short as the
engine would get hot fast but never to any degree that I would have thought
would be a problem.
I have an intercooler, however, without any
airflow its usefulness during testing is next to nothing. Also, the
intercooler ducting is somewhat minimum at this point.
I thought I would recognize detonation, as Lynn mentioned, but
perhaps not.
I also read on the RX-7 site that the rear
chamber is the one to usually fail, as mine seems to bare out.
Corporal; Patrol Division
Bellaire Police Department
From: Rotary
motors in aircraft [flyrotary@lancaironline.net] on behalf of
Mark Steitle [msteitle@gmail.com]
Sent: Friday, January 14, 2011
05:52
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Apex seal
update cont with pix of rotor andapex seals
My first impression is they got overheated.
Each apex appears very dark, possibly due to heat. Are you
pre-mixing or using the injection pump.
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