Mailing List flyrotary@lancaironline.net Message #11956
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: Low power 13B Operation
Date: Tue, 5 Oct 2004 19:46:23 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
I think it's probably the side seal or spring that got taken out by a piece of turbine wheel. Too much of a coincidence otherwise, 
 
The turbine wheel is downstream of the exhaust port, so there shouldn't be any pieces coming back toward the rotor.  If your compressor wheel lost some mass, that would do it.  However, I doubt it would get to the side seal, since the gap between the rotor and housing is small .  If you had a significant impact to the rotor, you should be able to see a dent on the face of the rotor through the exhaust port.     
 
 
but I bought the PB Blaster spray stuff recommended by Tracy just in case. Anyone have any tips for getting apex seals to pop? 
 
I have never done it, but I'm sure some folks here have.  My approach would be to blast it with the solvent, and let it soak, then try to exercise it with a nice blunt screwdriver.  I would expect to have to repeat this process a few times over a couple days before I'd give up.  PB Blaster is great stuff, but isn't the old tried and true solution automatic transmission fluid?   This sounds like a great Lynn or Leon question. 
 
I plan to. 3MM ones. And the teflon seals. 
 
Do you have 3mm apex seals now?  If not, I'm sure you realize you're in for some machine work.  I can't say I really hear anyone recommending 3mm seals these days.  Might want to ask around about that before proceeding.   
 
Good luck,
Rusty
 
 
 
 
 
 
 
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