ORIGINAL: DiscoWings
efflux = exhaust speed correct? form what I understand the faster the efflux the faster the aircraft will fly, so 50 lbs of thrust @ 100RPM vs 50lbs of thrust @ 125 RPM, the 125 RPM would be faster I assume, where as the 100 RPM will have more ''torque'' or static thrust.
That is not true. RPM has nothing to do with it. Rather can pressure and nozzle diameter. Rockets have zero rpm and are even faster then turbines :-)