I'm surprised you are asking about raising it but my guess is that it would have negligible effect.  The usual challenge is getting it as high as the original thrust line.  

Tracy

Sent from my iPad

On May 23, 2011, at 12:41 PM, Thomas Giddings <tom@midwestaviation.net> wrote:

> Does anyone know what the effect would be on airframe to raise the center of thrust for the crankshaft 1.5 " higher then original design?
>
> Kind regards
>
> Tom Giddings
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