>For instance if you stretch a 1 foot section to 3 feet >will it have the same tension as a 100 foot section >stretched to 300 feet?
Yes, of course. The % stretch is the same in each case. >If you stretch a piece of highstart tubing we will assume latex >to a certain percentage of its initial length does the resistance >have any relationship to the initial length. Yes, but this is more complicated. Rubber does not act like an ideal linear spring they teach about in Physics 101. For a spring the force/stretch relation is a straight line: twice the stretch = twice the force. Rubber used for rubber FF planes has a distinctively nonlinear S-shaped force/stretch relation. As you gradually stretch the rubber the force rises quickly at first, then more slowly, then quickly again as the rubber reaches the breaking point. Typically the rubber can be stretched 6-7 times its rest length before breaking. Old FF rubber like Pirelli was basically latex, so I expect histart rubber to have similar behavior. - Mark RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
