limits

I'm doing research for a story but I can't find any info on the maximum speed to extend the landing gear on a P-36/ Hawk 75 A. I know modern aircraft have published limits, but none of the technical data I've found on the P-36 mentions it. Does such a number exist? If not, what airspeed would be...

trying to find 190D dive limits,so far all the hand books i had seen,have not had any flight limits in them,can any help us?? thanks Ian

An invitation to the discussion about the realistic limits of the design and plausible changes upgrades for it.