Arnt Karlsen <[EMAIL PROTECTED]> said: > On Fri, 20 Sep 2002 10:13:17 -0500, > "Curtis L. Olson" <[EMAIL PROTECTED]> wrote in message > <[EMAIL PROTECTED]>: > > > Wing warping would be a very interesting application of tweening. It > > seems like you'd just need two identical versions of each wing ... one > > warped maximally in one direction, and the other warped maximally in > > the other direction ... assuming that halfway in between gives you a > > straight wing. David would likely need to tweak his animation hooks > > ..without the straight wing, how do we define the straight wing, > in the case of a differential wing warp setup? >
Just about every picture I've seen of Wright aircraft (except the ones hanging in museums), indicates that the wings are never really all that straight. Basically "straight" would be the approximate middle between warped one way or the other. But, if necessary we could always have the straight version too. That's the easy part. I've already got straight wings! These all were somewhat flimsy kites...very light construction, made from a bunch of sticks, cloth and very tight wire. The poles were tapered at the ends to balance rigidity with lighter weight. IIRC the 1903 powered flyer weighed only 600-700 pounds including the pilot and the cast iron engine. Here's a nice visual description of the wing warping concept: http://www.centennialofflight.gov/essay/Dictionary/wing_warping/DI56.htm And this too: http://www.first-to-fly.com/Adventure Images/Glider/wing warp.gif There are some interesting articles online about contemporary application of wing warping (to reduce drag), including this one: http://www.sae.org/aeromag/techupdate/06-2002/ Note that aircraft are never as infinitely rigid as our 3d models are. So, especially when we get to the point of modeling turbulence, it might be nice to make the 747 wings flap using this method. Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
