From: David A. Enete [mailto:[EMAIL PROTECTED]] > > Well, here's another look at it. For the discus-style planes with > pins in the outboard wing panels, use a short extension device with a > release mechanism. Maybe like hunting bow releases. The increase in > velocity with even a short extension on a discus-style launch would > be incredible. Check the speed, direction, and attitude, then let it > fly. > > Low-tech / high-tech option is to use an extension with formed > fingers from a pliable substance that will flex under a given amount > of stress. Then figure out how much speed is needed to impart the > stress and release the plane. I was thinking about this sort of thing when I started to get comments on wing launching HLG's following my launch analysis. How about building a model with a hollow carbon tube spar that runs right to the wing tip. Run a Kevlar string through the tube, attaching one end to the wing root (probably best to anchor it to a wing bolt that goes through or adjacent to the tube, so there's a solid link to the fuse). The other end of the kevlar string exits the tube at the wing tip and is what the launcher holds onto - sort of like a control liner. The technique would be a bit like an olympic hammer thrower... Some light elastic attached to the opposite wing tip and the kevlar would pull the string back inside the tube after release. There would be some non-trivial issues to be solved to make this work, not the least of which is the safety of everyone else on the field... :-) Ciao - Chris ****** Chris Kaiser Auckland, NEW ZEALAND http://www.rcmodels.com/clubs/asfcnz/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
