Matt Gewain writes: > Aramid fiber has a much lower density than carbon or glass fiber > so when you replace some of the carbon with Aramid the weight > of the model can be reduced. That's a good point. I was being perhaps overly harsh on the hybrid, since I was only considering cases where the material is pushed close to failure. In many model applications stiffness is a more relevant consideration, or there is a minimum-gauge constraint. The lower density makes the hybrid much more attractive in these cases. -- - Mark Drela RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
