Hi All, I reported a couple of issues and (one enhancement), complete with patches on the tracker, but there has been no follow up so I am wondering if the right way is to discuss on this list.
Any way, the 1st issue is #593. I have developed a YASIM aircraft model for an ultra micro R/C plane (less than 40cm wing span). The propeller spins at around 11000 rpm in stationary air and around 17000rpm no load and is directly connected to the engine (no gearbox). With appropriate parameters, yasim:PropEngine:stabilize does not converge in the 100 iterations allowed, essentially because the algorithm assumes slower engine speeds. The iteration starts at 52 rad/s and increases by 5 rad/s a maximum of 100 times to a maximum 552 rad/s or 5271.2 rpm. There is no way this algorithm can stabilise for an engine going any faster. My proposed solution is to scale the step size and starting angular velocity for the aircraft. Fortunately both TurbineEngine and PistonEngine models have some kind of "maxrpm" parameter which can be used for this purpose. This function yasim:PropEngine:stabilize does not seem to be used during normal operation of the simulator, but it is called at initialisation and it is certainly called by proptest. Can anyone see any problem with the proposed patch? Regards, Ian -- Ian Dall <[email protected]> ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
