Vref = vs0 x1.3 vs vsr0 x 1.23
Hi all
As I understand it most modern large aeroplane (Cs25) vref is derived from 1.23 x a stall reference which is a little different from the old method of 1.3 vs0.
Perhaps someone can correct me if I'm wrong here but vsr0 is the fastest speed attained during testing at which a part of the wing starts to stall, corrected to 1g whilst vs0 is the slowest speed and will be below 1g.
Can soneone confirm if that's correct and maybe explain it all a bit more fully or even point me to a reference ? (I couldn't find it in CS25 certification specs). How long ago did this change take place ?
Many thanks.