From: Vivian M. <viv...@li...> - 2006-03-30 08:11:11
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Martin Spott > syd & sandy wrote: >=20 > > I've been able to get out of /most/ stalls and spins, given > > enough altitude, but it's vital to ensure that the trims are > > centered, which is not likely to be the case if you've been > > using an autopilot. >=20 > I see. Yesterday I took several YASim aircraft for a test and noticed > that the effect _I_ mean is indeed unique to the b1900d. There's an > 'indicator' that you can easily reproduce during take-off: >=20 > When you accelerate with the elevator pulled back to the maximum, > almost every aircraft I know (from real or simulation) rotates early, > stays level and gets into the air after a while. The b1900d will never > lift both main wheels from the ground but instead will tumble to the > left or right, absolutely uncontrollable. If you try to correct the > bank using the ailerons it will tumble to the other side but you won't > manage to hold it level (unless you push the elevator). >=20 > I don't think this would happen with the real aircraft and I think as > well that the cause for this behaviour is the same that makes stall > recovery with the b1900d so difficult. Hmmm, this behaviour is consistent with the wing stall angle being (far) = too small - the wing is stalled on the ground. Having the twist angle = greater than the incidence won't help either. If you want to try, change the = wing stall angle in the YASim config file to 17.5, and you will get a = perfectly well behaved aircraft. (Or I have here, anyway). Vivian |