> Using derivations very similar to those described by Jon in his > latest paper, I have managed having my Su-26 alpha model do most > of these figures : > > http://aerobatics.ws/acro_figures.html > > The ones that still are a little "dirty" for me are the tailslide > and sided loops (the former because I always seem to have some > sideslip even with engine shut, the latter because I am plain bad > as a pilot ;o) ). Cuban eigths on the other hand instance are > piece of cake. Inverted spins require a lot of aileron work > whereas normal spins are pretty easy.
This is fascinating to me - I'll be interested to try it out. > All this to say that it looks very good. > > Now for a few questions : > - Are both half wings treated separately in JSBSim ? That can be > important for snap rolls, even though I do them day in day out now Yes, I know. The aerodynamics of a snap roll are ... interesting. We have talked about splitting up various surfaces on and off for years. I think David Megginson first suggested that approach. It's definitely a possibility. I suppose that ideally the wing would be split up into four or five parts on each side. Alpha would be calculated for each section given the rotational and translational state of the aircraft. But, I'm also wondering if there is a way to obtain the same effect with a three-dimensional table. Can someone give a detailed describption of a snap roll? Jon _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
