On 9/29/03 at 10:46 PM Jon Stockill wrote: >I've just created myself a DeHavilland Chipmunk flight model using >Aeromatic, but was wondering if it was possible to model the fuel system >more accurately such that the fuel flow stops after a period of inverted >flight/-ve G. > >I'm guessing it'd need to be modelled by tweaking the mix, but I'm not >sure if it can be tied into the xml, or if it'll need implementing >somewhere else.
[cc'd to jsbsim-devel] OTOH, at the moment the engine model is supplied a flag indicating either fuel available or not available. This is tied to whether fuel is in the tanks. However, you want to also tie it to gravity (lack-of) and length of time without the aformentioned. Since the specific behaviour will be fuel system dependent that begs the question - who owns and manages the fuel delivery system characteristics - FGPiston or the JSBSim framework. If FGPiston then mixture can be leaned out progressively though stutter and splutter to cut-off if required. If JSBSim, then easy to use the fuel-starved flag to model cut-off, possibly not as easy to model progressive cutting off. I guess the delivery system will be specified in xml - whether it's neg G tolerant and for how long etc. This reminds me - I've still got a few TODO's knocking about wrt the engine code - turbocharging, some spluttery warning of mixture over-leaning and a decent starter motor torque curve spring to mind. Cheers - Dave _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
