CorvAircraft> Thousands of hours with no crank breakage

[Dave Morris "BigD"]

This '66 Corsa Turbo Convertible I bought last year is trying to look 
nonchalant and act casual as I eye suspiciously the engine tucked away in 
its butt.  Hmmm... a turbo crank, 
eh? 
http://www.davemorris.com/Photos/Cars%20Corvair%20Corsa%20Project/IMG_0313.jpg

Dave Morris


At 07:27 PM 2/14/2006, you wrote:
>Dave Morris wrote:
>
> > Have we ever addressed the reason why there is a full page of airplanes
> > http://www.flycorvair.com/planes.html that have no crank failures?  Is
> > this
> > an RPM based problem?  I don't understand why everything was hunky dory
> > for
> > years and all of a sudden we have a major problem.
>
>I think RPM is certainly part of it.  But I also suspect that many of the
>high time engines were assembled in a time when you could just order up a
>turbo crank from your local GM dealer and get it day after tomorrow.  I'd
>think that anybody building an airplane engine would insist on the best
>crank money could buy, especially considering how much money you'd be saving
>over a new "aircraft" engine.  So a brand new nitrided turbo crank from GM
>would be a no-brainer, and would have nice radiuses that had not been
>molested by a machinist...
>
>Mark Langford, Huntsville, Alabama
>see KR2S project N56ML at http://home.hiwaay.net/~langford
>email to N56ML "at" hiwaay.net
>
>
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