I was thinking up to 10%, which is why I'll allow Gaston's argument.
I'm well aware of the manuals and their contents, the pilot errors, etc...
While not being a Mech/Aerodynamic engineer, I do work in the engineering field.. some 34 years of it, some on aircraft and some pilot time. So I am no stranger theory, formulae and modelling.. as well as the practical side, plus all the goodies that go with it.
Putting this all together, I'm not going to rule out Gaston 100%.
