What I mean is you have the config limit speed and next flap extension limit speed at the top of the speed tape and stall warning and 0.3G manoeuvre margin at the bottom of the speed tape. When operating F2, provided you are at the manoeuvre speed, as shown by the 2 symbol on the tape, you are well away from both limiting speeds therefore by definition you are free to operate the airplane within the normal envelope.
I flew the classics -200, hardball-300 and EFIS classic for 7,000 hrs on a fixed flap speed schedule which admittedly doesnt have a published fixed speed for F2, which is what I now think you were writing about. I've been on the NG for a while now so loosing touch in the Jurassic and Classic.
Captijns was post 9 that said 40%....
Rgds