Originally Posted by
deltafox44
The nose up moment of the engines thrust may be important at lower speeds, but negligible at higher speeds, since the thrust is constant but any other aerodynamic moments vary as the square of speed.
What about the pitch of airbrakes ?
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Thrust also varies as a square of speed?!
Acceleration is "metres per second squared"
I think I see where you may be trying to come from... thrust and drag are balancing out, increasing thrust will result in an ever decreasing change in velocity. (Or less acceleration)
But if you agree with this, you must also accept... in that state, a marginal reduction in thrust will result in an ever increasing change in velocity? (Or more deceleration)
My point is, doesn't matter where on the scale you want to pick, drag and thrust are always going to be proportional to eachother.