May i ask the reason
unwinding altimeter
And last question, if we enter little gusty air, it is obvious that we are not able to know that what is waiting us next, may be a gust at the limits of the envelope, so do you think that we must reduce the speed near Va if we meet such a humble gust,
Edit: and i wonder why Vfe is given as IAS, as we know the inherent dynamic characteristics of the structure such as natural frequencies are independent of the density of the air, but the excitation forces are probably a function of density, so i dont think there is a simple relation like the relation between Tas and Ias when flutter is considered, i really wonder the reason, and i think there is no time to think all of those and make some calculations when the airplane starts to dive,