> This is from a booklet titled Automotive Composites 2nd edition
> published by High Performance Composites magazine which
> I have a subscription to.
> > This is very similar to what we are trying to do with
> a carbon composite bell housings and motor mount combo.
> The wall thicknesses are also similar to what I suggested
> for the bell housings.
> > Note the 30 to 35 gear box consumption in a season
> comment. So typical of professional car racing.
> > Paul Lamar ...No rotor no motor.

Paul

I think we should have dave just design the entire thing including
the redrive housing and just use the guts out of Tracy's psru.

Tony

Have you talked to him about this?
Have you any idea what Honda spent on developing
this gear box? My guess is well over $100,000
so far. Maybe a lot more.

Designing a composite gear box running
at temperatures over 200 F is not easy by any stretch
of the imagination. The Honda design is still evolving.
I am sure Honda has the gear box extensively instrumented
with thermocouples or thermistors to map the temperature
in different critical areas. Needless to say a gear box failure in
a airplane is way worse than a gear box failure in a car.

A bell housing by comparison is quite simple with rather
simple loads.

 From reading what Dave has written on the Internet
and his web site it does not sound like Dave is an engineer.
I get the impression that Dave fabricates stuff
designed by racing car engineers.

Paul Lamar ...No rotor no motor.

Paul

First I have to say I have no idea what Honda spent on developing
that gear box.  Dave tells me that as long as you don't exceed the
Autoclave limit of 350 deg cure there shouldn't be a problem as he
said before a bearing will only stand so much heat and it is a lot
less than what this carbon can handle apparently. it looks to me
by the article that you have posted that the material seems to be
available so will it just be a question of fiber orientation? As
far as Dave being an engineer? I can't say definitively whether he
is or isn't, but I sure can say he has a heck of an airplane.
If he built that thing and isn't engineer then there is hope for
me yet. :). Can you give me a final design that I can send him
Paul? I think you should do one with the engine mount and one
without. I still like the schertz beam myself.


Tony

The airplane has not flown yet. Building something and designing
something correctly are two entirely different matters.

I am sure Dave knows more about composite design than I do.

Paul Lamar ...No rotor no motor.

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