If you had a prop like these SS-UNITED-STATES • COM
on your 'plane and you locked the prop I think gravity would take charge a lot sooner rather than later.....and there would not be a lot of difference if it could free wheel
Can we reach a consensus here that air and water
are fundamentally different?
To take an example..... I have an Aqua4Aerogen.... wind
. 2 bladed 'water' fan is maybe 5 inch diameter.... produces 5 amps at 5 knots. The 'Air' fan is six bladed maybe 15 inch diam .. needs about 20 knots to give 5 amps. Guess the water is thicker or something.... just a guess.