Denis wrote:

For my ASH 26 E at Vne: 4 G load factor (down from 5.3 at Va); 3.5 G
load factor airbrakes extended. It looks like the G limits at Vne are
fairly close together.


Airbrakes out at Va it's 3.5 g instead of 5.3, thus the difference is
significant. I don't know why there is almost no difference at VNE, butI
suspect that in that case the margin is higher without airbrakes than with.

I am curious about why they decrease.

There is a loss of lift at the airbrakes, thus for the same G the outer
wing is more loaded, and the bending momentat wing root increases.

I should have said "I'm curious about why the G loading (airbrakes
closed) is lower at Vne than at Va". Perhaps it is to absorb gusts, or
to allow greater control deflections.

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Eric Greenwell
Washington State
USA