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Old 12-06-2012, 07:28 PM
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Toobuilder Toobuilder is offline
 
Join Date: Jul 2009
Location: Mojave
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Quote:
Originally Posted by Sparky View Post
If I'm not mistaken, engine mount wobble (wet dog shake) is mostly rotational...
The operative word there is "mostly"...

My Hiperbipe will set up a resonance with the spring gear at certain taxi speeds/RPM and the spinner wobbles very noticeably in relation to the cowl. This is a non concentric path that in extreme cases will contact the cowl with the spinner backplate. The mounts are admittedly getting soft, but the point remains - consider some angular displacement when setting up minimum clearance from a very expensive propeller blade.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
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Harmon Rocket II -SDS EFI
1940 Taylorcraft BL-65
1984 L39C - SOLD
RV-8 - SDS CPI - SOLD
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