--- Major A <[EMAIL PROTECTED]> wrote: > > > > A pilot familiar with that plane is almost certainly going to > find it > > > very unstable in the pitch axis, and complain that the nose > bounces up > > > and down too much. In the real plane, the dynamic pressure from > the > > > relative wind tends to hold the control surfaces in one spot, and > it > > > takes a bit of effort to move them from where they want to be (a > *lot* > > > of effort for a big deflection). A home-computer joystick or > yoke > > > might have a little spring in it, but in general, it's going to > be far > > > too easy for the computer user to create an elevator deflection, > and > > > the plane's going to feel unstable. > > Just an idea -- if someone were to build proper force-feedback > yoke/pedals/etc., would FlightGear be able to drive them > realistically? I.e., is force on the controls part of the FDM?
The flight control system in JSBSim will allow for it as it stands, but work would have to be done to get that info to FG. Also, none of our models currently calculate the forces. > > > Fly! allowed one to change the exponential effect. Possibly it > is > > misnamed, x^n involves an exponent, perhaps it was 'n' that could > be > > varied. MSFS2K appears to have changed to some intrinsic > non-linear > > mapping compared to FS98. > > I don't know about Fly!, but "exponential" traditionally is a > misnomer. A lot of RC transmitters allow you to set it, but that > usually means that the response is proportional until you reach a > certain deflection, then makes a kink and the control starts reacting > with more authority, but still linearly. No such thing as an > exponential function, which is probably because exponentiation is > rather difficult to implement in analogue electronics. > > > Fly!, and MS FS/CFS allow one to change 'null zone' and > > 'sensitivity' for the JS in the menu. Lower sensitivity adds more > low > > Is the null zone there in a real aircraft (backlash), or just a > feature of the sim to allow the pilot to go and grab a cup of coffee? > > > > -1.0 => -1.00 > > > -0.5 => -0.25 > > > 0.0 => 0.00 > > > 0.5 => 0.25 > > > 1.0 => 1.00 > > This is a good response, but it also implies that at 0 deflection, > the > control is totally nonresponsive (gradient is zero). Shouldn't we > simply add a linear term here? That would make the control linear > around the centre and transition into a square response at higher > deflections. Umm, I think that he's trying to reduce the response around the center. > > Andras > > =========================================================================== > Major Andras > e-mail: [EMAIL PROTECTED] > www: http://andras.webhop.org/ > =========================================================================== > > _______________________________________________ > Flightgear-devel mailing list > [EMAIL PROTECTED] > http://mail.flightgear.org/mailman/listinfo/flightgear-devel > > __________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
