Bill,
   The nomex honeycomb is a bit tricky to use unless you understand it
   fully -
   it requires fillet forming resin and extremely careful application.
   Considering the weight advantage of such a small item the high
   density foam
   would be a much better choice in this application. The right resin would
   require some research.
   While were on the subject a front housing similar to the RX8 front
   housing,
   to fit the RX7 would be a great bonus.
   George ( down under)

George,
There are several thermoset resins that are fire retardant. The Nomex HC
isn't that hard to contour. But divincell foam would work fine as well.
Bill

I don't think you want sandwich on this part. Sandwich is
stiff up to a certain load but after that it collapses.
I think you want solid carbon fiber. The part is relatively
small, unlike a wing skin, so the weight penalty will be little.


Paul Lamar ...No rotor no motor.

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