One indication only, Engine Torque, displayed in in/lbs and measured between the core engine and the gearbox by the Torque Meter Shaft assembly. On all up to and including the 'H' model a limit of 19600 in/lbs applied, this being an engine mounting limit rather than an engine limitation.
you mixed something up fella. the 19600 in/lbs are surely the value for the propshaft- not the engine. since we know that the simple formula for calculating power from torque and rpm,s is torque ( in in/lb) x rpm / 5252 you can calculate the power.
the prop of the herky spins about 1000 rpm and the engine about 13800rpm , right ?
soo... 19600x1000/5252 which results in a little more than 3730hp.
imagine the engine by itself would have this torque .... 19600x13800/5252...
the turbine is a high speed low torque thing and the prop / via a gearbox a high torque low speed device. at turboprops the propshaft torque is measured.
but not sure if the thread opener talked turboprops...
one more word to the usuful thrust/power when the engine are pulling but the aircraft is hold by the brakes... the aircraft as a whole thing does not develop any useful work, but the engines of course do - their use in our case is just to strenght the brakes.
cheers gents !
