Thanks again Kieth for your very complete and logical explanation, as always.
But I do have a problem,... following your argumentation, it leads me to think that the fastest you fly, the longest is the aircraft TAS vector in comparison to the vertical gust vector, then the least sensitive to gust would be the aircraft. However we know that it is not the case since we always have to slow down to
Vb (outside yellow arc for C152) while flying through turbulent air.
How can you explain this contradiction ?
Thanks again for your help Kieth,
Emmanuel Cordier.