<<..As far as the drag race guy goes, I have met him and he has forgotten
more about engines and gearboxes than you will ever know.  He has designed
and built a Hydrogen engine for General Motors, he designed and built a
FADEC system and a complete fuel injection for John Force who has won 100
National Championships....I have seen his shop and he has 7 CNC's two 5,000
HP dyno's and everything else needed to fabricate anything  one could
imagine.  Tom is not the only one that is afraid of your design of a gearbox
or the EngineAir solution. When the main drive is about .050in. thick for
400 HP that my friend is a design that needs much rework....I watched the
gearbox fail.....You should thank your lucky stars that it broke when it
did.  I believe in safety and lowering the risk of flying not increasing
it....I am only asking anyone that is looking for an alternative to a
Turbine or an aircraft designed engine to beware.>>

Lots of innuendos and out-of context comments, but not much real information
for those of us that aren't in the know.  I have known ignorant people that
win and knowledgeable people that lost.  I know some that own dynos and
can't design engines.  And lots of different metal thicknesses are used in
lots of different applications.  I assume you are saying that the referenced
drive that failed did so because a .050 piece of metal failed?  All turbine
and "aircraft-designed" engines can be assumed reliable?  More info please.

Gary Casey
ES project