Can anyone point out a definition of Va from an accredited body that even mentions the word "stall"? I've never seen one.
§ 23.335 Design airspeeds.
c) Design maneuvering speed VA. For VA,the following applies:
(1) VA may not be less than VS√ n where—
(i) VS is a computed stalling speed with flaps retracted at the design weight, normally based on the maximum airplane normal force coefficients, CNA ; and
(ii) n is the limit maneuvering load factor used in design
(2) The value of VA need not exceed the value of VC used in design.
(d) Design speed for maximum gust intensity,
VB. For
VB, the following apply:
(1)
VB may not be less than the speed determined by the intersection of the line representing the maximum positive lift, CNMAX, and the line representing the rough air gust velocity on the gust V-n diagram, or VS1√ ng, whichever is less, where:
(i) ngthe positive airplane gust load factor due to gust, at speed VC (in accordance with §23.341), and at the particular weight under consideration; and
(ii) VS1 is the stalling speed with the flaps retracted at the particular weight under consideration.
(2)
VB need not be greater than VC.