Originally Posted by
localflighteast
half the gust factor , the difference between the wind and the max gust
so 20 knots in this case
so add 10 knots ( although I was taught UP TO half the gust factor) IE no more!
I would be interested in knowing your authoritative source for this.
Aeroplane gust response is proportional to the square of airspeed (source, any good university textbook on flight mechanics). So, adding (say) 10% to IAS, will add 21% to the airframe response to a gust. That has never seemed to me to be particularly wise in a conventionally configured aeroplane.
G