Rotor drive application

[alansimpson]

I am doing a R&D test on a rotor I need to spin at 5000 rpm. Currently I have a 2.2Kw 3ph motor which is maxing out at 1000 rpm. There is a 4.5:1 step up belt transmission. Given that I am mostly working against air friction on the rotor, how could I calculate power requirements to drive rotor at 5000 rpm?

 

[arto]

There's a "wicked good" nice simple Windage article from NASA by J.E. Vrancik, "Prediction of Windage Power Loss in Alternators," 1968. NASA TN-4849

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19680027690_1968027690.pdf

Your tax dollars at work! ;-)