I've been flying the Fokker 100 quite a bit, and I've noticed similar instabilities. Roughly (I am not a pilot)
- very rapid control response, especially on the roll axis). This sometimes extends to a 'snap' condition where I command an aileron reversal (okay, I just pull my joystick to the other side), and there is a very prolonged period with no response (for example, 8 or 10 seconds, usually continuing the previous roll command) until the roll suddenly flips over.
This is also like the Fokker 50, still using the direct output from aeromatic without any modifications. If David manages to create a new version of aeromatic that would make it easy to replace the current version.
- a similar elevator effect to that martin described, when deploying the flaps at high speeds
- very odd high pitch angle behavior ... I can't really describe it, alas. It seems like way too much lift is getting developed at high angles of attack, without a corresponding increase in drag to slow the aircraft.
The Fokker 100 supposedly has a very efficient airfoil (e.g. much lift, low drag) which might add to this a bit, but there is a problem.
I guess it's the CG or aero reference point (or both) that needs tweaking.
Anyway, aside from the nit-picking, it's a lovely plane, at least until we get an ERJ ;-)
Heh :-) Well, no ERJ until someone creates one ...
Erik
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