Andy Ross said: > David Megginson wrote: > > When you engage a starter on a piston engine (I have no turbine > > experience), it spins the propeller at an extremely slow, constant > > speed -- maybe 30 rpm -- until the engine fires; at that point, the > > engine spins the propeller up to speed (say, 1000 rpm with the > > throttle slightly open) almost instantly. > > Yeah, although that's not too terribly different than what happens > now. The issues are all with tuning and threshold changes. > > The problems with the current approach that I can see: > > + The "start" threshold is probably too high (it's currently set to > 200 RPM, which doesn't match your value of 30 very well.) > + The torque behavior of the engine and propeller at low speeds is > kinda broken. The propeller isn't draggy enough, so you had to tune > up the engine friction to get the idle speed right, which led to > complaints on IRC that the Mustang wouldn't start, which led me to > hack in the starter motor changes for a near-term fix.
Is that the patch that you applied yesterday? I don't recall any difficulty with the Mustang starter. > Turning down the start RPM would probably be the fix required here. > I'll check that in instead (I think I might use 60 instead of 30, > which really does seem awfully slow) and see if folks like it. Ah ok. From memory (not so good) I thought this was configurable. 60 sounds like a good value anyway. Would this make engines appear to "start" too quickly? Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
