Mailing List flyrotary@lancaironline.net Message #44961
From: David Staten <david.staten@gmail.com>
Subject: Re: [FlyRotary] Re: Frying pan into the fire....Arrgh
Date: Mon, 26 Jan 2009 21:52:05 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
For the first incarnation of the rotary rebuild on chris's plane, I had purchased 3 cores as a batch from a guy in Biloxi (pre Katrina).. all of the parts from those engines were recycled into 1.75 functional engines.. including the bolts. For that rebuild we did not buy a bolt kit, but polished and reused the existing bolts.

I have not heard Chris mention that he bought new bolts, so they were likely the old ones and a bit stretched.

I have no reason to believe they weren't torqued properly. Our first build we used electric tape AND silicone to help prevent tension related harmonics and that made the bolts a very snug fit, and we torqued meticulously then. I would expect he did likewise now

Possible, but not likely.
Dave

David Moyer wrote:
Is it possible that the engine studs weren't torqued to the proper settings or that they stretched? Just a few uneducated guesses. So take it for what it is worth.

wrjjrs@aol.com wrote:
Guys,
If he is getting coolant around the o-rings at those temps there must be a problem. The cars have 185°F thermostats for crying out loud. 220 for a short time should NOT kill the o-rings. I would check to be sure you hadn't broken an engine stud. (Or two!) Often not replaced at rebuild they can break.
Bill Jepson

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