Slow flight Issue!!! Help...

[Guest CX330_CPA Virtual]

Hey all. I've been building the A340 air file from scratch and yesterday I started testing the plane's performance in slow flight and especially during the approaches. And something really weird surfaced...Whenever I extend flaps in slow flight, like on approach for example, the plane goes into this really steep dive, which is quite controllable but definitely should not be taking place. Which records in the air file I should be looking at to fix this? Is this too much lift for flaps [CL_Df]? Or pitch moment / flaps [CM_Df] is too high? Anything else? I seem to be a little lost here. I will apreciate all opinions.Cheers.

[Guest Fabio Miguez]

Hey CX330 CPA Virtual.Wrong forum. People around here know a bit about this stuff, but you wanna go here http://www.avhistory.org/scripts/MegaBBS/f...w.asp?forumid=5These are where the experts are, and they are very much willing to help. Check it out and they will straighten you out.

[Guest CX330_CPA Virtual]

Yeah thx i work with this guys quite oftenBut actually i solved it already...The problem was within the air file Rec. 1539 Fs2k2 Lift Derrivatives, CL_Df was set a bit too high. Now it much much better :-)Cheers, Thx anyway.http://vatsim.pilotmedia.fi/statusindicato...tor=OD1&a=a.jpg

[Guest Fabio Miguez]

Hey CX330 CPA Virtual.I am glad you frequent that forum, and also glad you figured out the problem.Are you also building the visual model for the A340? Or you paired up with someone that has, and are just working on the flight dynamics? Or perhaps you are just doing the FD by yourself?In any case, I am glad, for we need some good ones. Keep us posted.

[Guest CX330_CPA Virtual]

Cant' really talk about it ...The whole thing is hush hush...But i am sure you've seen the screenies at this forum :-) Thats all i can say.

[Guest CX330_CPA Virtual]

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