Mailing List flyrotary@lancaironline.net Message #14085
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: Engine damage thoughts
Date: Sat, 18 Dec 2004 23:14:57 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message

   Something I will ask is at what rpm and power setting did the
engine seize at??

The engine did NOT seize.  As I stated before, it quit because I tried to throttle up with the mixture set way lean.  I have no reason to believe the engine is damaged, aside from what feels like a bit less compression than normal. 

As for the bearings, Bruce also said the bearings would be the first to go, but I have to wonder now if that isn't a car vs airplane experience.  He sees car engines that have run for some time without oil, but at very low power settings.  In that case, the bearings may be the first to go.  In your case, you ran at high power, which would probably generate enough heat to seize the engine, possibly before the bearings got damaged.  

I still find it very hard to believe the engine ran without oil pressure for more than about 30 seconds, and did so at very lean mixture, and idle power.  I can't see how this is any more damaging than cranking the engine several times.  Maybe I'll learn something from the oil filter tomorrow.

Cheers,

Rusty 



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