Am Sonntag, den 27.09.2009, 23:20 +0200 schrieb Dany 2eme: > Hi, FlightGeardevelopers, > > YASim airplanes seem to have in common a non realistic behaviour from > my point of view: > > At least from my experience on Very Light Airplanes in real life, when > you make a skid, or side-slipping (for a rapid loss of altitude > without gaining too much speed) you push on the rudder, say, on the > left, and move the yoke to the right to compensate for the rotation > effect of the rudder, and finally go straight, but "in crab" through > (calm) air. Then, your wings are inclined to the right side and the > plane glides to the right without turning. Drag increases much. For a > landing with wind from the side (from the right in my example above), > this is also used to align the aircraft axis (the wheels) with the > movement along the runway axis before touch (you touch with one wheel, > inclined but aligned with the runway and the movement relative to the > ground; against the air, you skid to the right, compensating the wind > on the beam). > > This is well simulated with jsbsim airplanes. > > Differently, with YASim airplanes, you can make a straight > side-slipping with the rudder right home (left or right, of course > with auto-coordination off) and, after a little stabilization time, > with wings in horizontal position. I think this is not realistic > because, for me, with wings in horizontal position and continuously > pressing on the rudder, the plane should turn according to the > rudder. Moreover, it does not allow training for landing with wind > from the side, which is a difficult and interesting exercise. If I'm > right (what do pilots in real life think of it ?) that's a pity > because YASIM seems a very interesting FDM. > > Is this a YASim weakness ? If yes, can it be corrected ? (I'm sorry > not to be able to participate). > This may be Aircraft specific. You didn't tell us with which Aircraft you tried, but the ones I tested (spitfireIX, PC-6, rallye-MS839,g115, DR400) work as expected, although in my opinion the Rudder effectiveness of the DR-400 is a bit high and produces a very pronounced sideslip with extreme crab angle.
Please tell us which Aircraft showed this and we can test and comment. Greetings > Thank you to those who made an effort to understand that I wrote... > > Dany > > > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9-12, 2009. Register now! > http://p.sf.net/sfu/devconf > _______________________________________________ Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- Detlef Faber http://www.sol2500.net/flightgear ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
