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Mess with your minds: A wind powered craft going faster than a tail wind speed.

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Kleinstein:

--- Quote from: electrodacus on December 16, 2021, 03:15:09 am ---I showed the correct equation for wind power that relates to such a vehicle 0.5 * air density * area * (wind speed - vehicle speed)^3

--- End quote ---
That is the power theoretical available to a wind turbine on the vehicle, but not the power needed to more the vehicle. So a "correct" formular. but for a different problem.


--- Quote from: electrodacus on December 16, 2021, 03:15:09 am ---0.5 * 1.2 * 0.5 * (64)^3 = 78.6kW of drag with just 0.3kW on input power.
How much more extreme you need the values to be in order to seems shocking.

--- End quote ---
I am quite shocked by this result - not by the number, but by the units:  the drag is a force and not a power ! :horse:

jonovid:
the earth is moving through space and spinning so how are we not ripped apart and flung into the sky by centrifugal forces.
as what we stand on is not static.  :-//

BrianHG:
Ok, give me a vote to go ahead and flip 'electrodacus' head this weekend making him convince himself that a wind powered craft going faster than a tail wind speed with his own logic...

How many here would like to see that happen?

Brumby:
Go for it.

Labrat101:
I second it . Go for it ..
Please record it . We need a good  :-DD @  :horse:

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