Quote:
Originally Posted by Tom Line
Back of the napkin tells me that if you're putting out a uniform 28 mph across a 32 inch fan, you'll get around 340 lbf out of it. Anyone want to check my numbers? I guessed on some of my constants - been a while since I cared about air density
If my numbers are right, conservatively you may get 150 pounds of push out of it. Not too shabby!
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I'd have to say your estimate is quite generous. We have run a fan test on a 28 inch prop with it directly connected to a CIM motor (1:1). Xoar 28x10 prop gives us approximately 8lb static thrust, whilst a 28x12 gives approx 7lb of static thrust.