ORIGINAL: Flying freak
but how can that be i mean lets say you ahve a deadstick at 200mph and manage to keep 200mph your entire aircraft is flying at 200mph wing tail battery everythign, right? how does this also not apply to the prop? i mean the engine is travelling 200mph so it should just be a simple addition ...
unless you can think of a reason it wouldnt be..
Well, run it through the formula to see if you get the right answer. In this case:
Vr = 0
V = 200mph
So
Vtip = (200^2)^1/2 = 200mph
So it is still applicable. The reason the numbers aren't anything like linear is the square root of the sum of the squares. The tip speed component is much larger than the aircraft component and the square root term minimizes the change caused by the addition.
Mark