-------------------------------------------------- From: "Erik Hofman" <[email protected]> Sent: Saturday, March 20, 2010 10:04 AM To: "FlightGear developers discussions" <[email protected]> Subject: Re: [Flightgear-devel] Bounce at startup.
> Alan Teeder wrote: >> I am (trying) to develop a model with JSBSim. >> >> At the moment the aircraft jumps violently into the air at startup and >> then >> bounces around on the runway until it sorts itself out. >> >> Is there a way of setting the initial height so that it is more or less >> in >> balance or is there something else that I need to look at? > > This normally happens when the gear spring coefficients are not set > properly. > > Try looking at a configuration for a similar aircraft that sits steady > at the runway and adjust spring_coeff and damping_coeff accordingly to > see if it solves the problem. > > Erik Thanks Eric, but the U/C (numbers from aeromatic) seems stable. It looks like an initialisation problem. If I start and switch immediately to rear view, the gear extends, and when it reaches "down" the plane is thrown upwards! Most times it lands back on the wheels and settles down, other times the airframe is first to touch down and then .......... Is there a recommended way of initialising all the systems which copes with both on ground and in-air start-ups. ? Alan ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
