Re: [Flightgear-devel] Engine models: start-up and commonality betweenFDMs

[Julian Foad]

David Luff wrote:

On 11/10/02 at 4:02 AM Julian Foad wrote:

Ah yes, starting, I seem to recall a lot of hacking and kludging to get
everything to work :-)  There's a number of problems currently:

...

Have fun :-)

Ah, glad you're there. If you're interested and have time to look, my current attempt is at

http://www.btinternet.com/~julianfoad/fgfs/JSB_piston_engine.diff
http://www.btinternet.com/~julianfoad/fgfs/engine_sound.diff

but, as I said, not finished. (Well, it will never be "finished". I mean not completely satisfactory as a patch yet.) It removes some of the arbitrary bits - especially the non-linear bits like "if RPM < N then ..." - and makes starting and idling nicer (especially at throttle less than the minimum allowed idle setting - it was fun running it below 500 RPM, on the unstable side of its power curve, after I put the friction always present but before I put the "idle adjust" constant in there).

- Julian


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