Mailing List flyrotary@lancaironline.net Message #30119
From: Chuck Dunlap <crayd@cableone.net>
Subject: Another rotary failure
Date: Sat, 11 Feb 2006 22:26:29 -0700
To: ACRE NL <rotaryeng@earthlink.net>, Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Sorry I didn't make to Bill Eslick's for the Rotorfest, I missed by about one hour. About 30 miles north of San Angelo TX the RPM suddenly dropped and I could not restore it with any of my emergency procedures. GPS told me nearest airport was Robert Lee about 15 miles away. I headed there and landed without incident.
Turning the prop by hand shows almost zero compression in one rotor, indicating bad/broken apex seals, quite similar to my engine-out experience 2 1/2 years ago which caused a forced landing near the Grand Canyon. This time the vibration was not quite as bad, and the RPM dropped to around 4300 which was still not enough to maintain altitude.  I called my friend with a Glasair and he cam got me and took me home. I will have to find some time to build another motor and drive 12 hours back there and swap motors. Or I might drive there, remove the wings and trailer it back, have not decided yet.
My good friend/mentor/flight instructor is trying to talk me into going back to a Lycosaurus, and I have to think of some good reasons not to. Until I get the motor back and torn apart, I wont know what caused the failure, but I will post anything that I find.
 
Regards
Chuck Dunlap
RV-6 13B 535 hours
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