Originally Posted by Duns3r
...Exactly, that is your guess, and you can not imagine, and there is no value that you can think of.
No, it's factual. For any given wing (flap setting) configuration, there will be one speed only that gives best rate of climb. In the case of the Twin Otter wing, in combination with a 620 HP limit and flaps 10 extended, best rate of climb will be achieved at 80 KIAS, assuming MTOW. At higher speeds, rate of climb degrades.
Michael