I am thinking that with a hemogladius of 3 degrees off dead center of rotational stringionatomally that you would most certainly get an extra 2.23% of Rotational enersion brought on by the extra 6.89% of Aeropladidius. Also if you figure in geomorhic gains then I can surely see how he came up with his figures. Its really a simple equation that when mathmatically figured with the right equations and a little BS comes out just about any way you would like it to. We can talk about Monogenerotology and it effects in relation to pitchless reflexation in another thread sometime since I know every RC Modeler just eats this stuff up and is eager to learn more about my theories in Aerobull****ersology!
ORIGINAL: William Robison
Meschmidt:
I realize that post about the Quadra and the Herbrandsen was tongue in cheek, but I'm curious about your numbers. If they were guesses no problem, but my eye was caught, so I plugged them into some calculations.
A 24" prop running at 12,365 rpm static has a tip speed of 882.86 mph, if that rpm is in the air, then the 21.55" pitch at 70% efficiency gives an air speed of 176.63 mph, and the resultant propellor tip speed is then 900.36 mph. If the tip speeds are really running that high I'm surprised the prop tips aren't squared off- they'd be a lot more efficient that way, the diameter could be decreased without lowering the thrust.
Finally, your added 157 rpm at a 21.55 pitch only adds 3.2 mph if there is no slip at all.
Please, I'm not trying to shoot you down, the numbers just looked wrong, I've never been into that kind of racing, and I'm curious.
Bill.