Major A <[EMAIL PROTECTED]> said: > > > OK, I've examined the jet code a bit more closely, and it actually > > looks pretty good to me. Attached is a graph of available thrust > > vs. speed and altitude for the engines as modelled on the 747-400. I > > threw together a little program that looped over the Jet object, and > > played with gnuplot's really nifty contour feature a bit. (Apologies > > for the binary attachment -- it's only 9k, which puts it right at the > > border of acceptability, IMHO). > > This may or may not have anything to do with the jet code, but with > the 747-yasim, I cannot slow the plane below about 280kt in level > flight at 3000ft ASL with throttles at minimum and full flaps, which > makes the plane rather hard to land... > > This is just an observation, I'm not a pilot, please forgive me if I'm > talking total nonsense...
Legally you shouldn't be up to 280kt at 3000ftASL :-). If I'm not mistaken you really need to get under 220 or so some 15 miles out. Below 10,000 ft slow down to 245 or so (250 is the speed limit) to prepare for an approach. Half a million pounds packs a lot of momentum. Oh yeah, if your fuel tanks are half full you might not be able to land without crashing anyway. Not sure what the recomendation is for that. There should be speed brakes which would have helped a lot, but they might not be implemented yet. There are also a bunch of flaps on a real 747 and I'm not sure which ones are actually modeled. Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
