On 6/29/03 at 4:42 PM David Megginson wrote: >David Luff writes: > > > Oops - I'm not keeping up!! Now that you mention it I think I do recall > > you mentioning the default plane changing to carb. Modelling a slight > > power change due to carb heat shouldn't be too hard - I'll take a look >at > > it if someone wants to add the switch to the panel. > >To do it properly, we should just change the temperature of the intake >air by some function of the exhaust temperature. By heating (and >thinning out) the air, carb heat makes the engine run richer, and >there are situations where that will actually give a power increase >(i.e. when you're running lean of best-power mixture). It would be >nice if all of that could fall out naturally.
It should all (hopefully ;-) fall out naturally once I get the power to be based on the mass flow rate of air and fuel into the engine plus combustion and thermal efficiency instead of the current manifold pressure plus temperature and mixture correction factors bodge, which I need to do anyway in order to get turbo/supercharging to work. As far as the carb heat goes, the problem will be estimating how much temperature increase actually occurs in real life, but that shouldn't pose too much of a problem. Cheers - Dave _______________________________________________ Flightgear-users mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-users
