barit1
Example: Helo turbine engines have a governor to hold a constant rotor speed through climb, cruise, descent, & hover; fairly similar to cruise control of your auto. If you climb too steep a hill in your car, it "runs out of steam" and the car slows down. Likewise if you pull too much collective in your whirly. The details of why this speed falloff are DIFFERENT in the two cases
The crux of the Colgan copter accident
One side claims fuel starvation, while the other side claims load dip