Originally Posted by FlyingStone
Most aircraft have the highest climb gradient when fully clean (i.e. no gear or flaps/slats extended). Flats and slats are used however to reduce takeoff roll, especially on jets/large turboprops of which none (as far as I know) are certified for flapless takeoff.
So, climb rate isn't dependent on flap settings, is that what you mean? And whoever talked about flapless takeoff...
