I wonder if any of the old hands here could shed some light on how to go about moderating the "mach tuck" effect in FSX? I'm tweaking a WW2 prop fighter - in a steep dive from 25,000 feet, a very strong nose down pitching moment develops at approx 300 mph IAS / 18,000 feet. It rapidly builds to the point where recovery is impossible, and just past 400 mph IAS the elevator control actually reverses. I'd like to neutralize or at least postpone the onset and severity of this nose down pitching moment, and if possible eliminate the control reversal.
The two .air file variables I've been adjusting in an effort to improve things are Cmo in Primary Aero/Pitch, and record 433, Delta Cmo(M). From what I've seen so far, it seems that inserting negative values in Primary Aero / Cmo gives various degrees of nose up pitching moment and moderates the tuck, and that increases to the Y values in the curve at record 433 work against this moderation. I suspect that successful juggling of the two could eventually deliver a partial solution, but am working in the dark here. In particular, I don't have a good understanding of the horizontal axis at record 433 - presumably the increments here are various Mach values, but I'm not certain of the actual values in use. I'm also concerned that changes to the Cmo value in Primary Aero will have undesireable effects elsewhere in the flight envelope.
Am I on the right track? Advice would be much appreciated. Thanks.
blue six
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