Originally Posted by
megan
Maybe, maybe not. All you can tell was the prop was rotating. For the zero thrust setting of 100/1,600 and using recommended One Engine Inoperative Climb speeds the engine is producing no prop thrust, but consuming 30.46 shaft horse power just to rotate the prop. If you were to reduce TQ to 10 ft-lb and the prop maintained 1,600 RPM, that means the slipstream is contributing 27.4 SHP. What the prop RPM at zero TQ and recommended One-Engine-Inoperative Climb speeds I have no idea.
Do you understand how the Tq is calculated. Do you understand that the oil suply to the prop at 1600 RPM IS AT VERY BEST ONLY JUST in gov range. This means to gov the prop is unlikely to occur. However to have the Tq at ZERO Tq and a prop speed of 1600 rpm is impossible. For Zero tq means the gas generator must be stopped. This means no oil px to the power section. This means no oil to the gov. This means Zero oil to the prop. This means the counter weights and spring will place the prop into feather by its self with Zero input via any pilot input. This means rotational speed of the prop is amlost zero. This means your statement of i have no idea is true and correct. Therefore any speed of the prop is producing forward thrust. The only thing now is how much it was producing.