Blue Scallop, your questions are getting way off-topic.
That has happened on final approach but the autopilot was to blame. (Faulty altimeter indicated plane was already on the ground.) The pilots were caught by surprise and results were catastrophic.What would happen if the pilot accidentally just pull the throttle to less than half and the airplane stalls and fall..
Not all motors will produce BEMF only those with perminant magnet rotors.or stators. Back EMF or eddy current losses can reduce positive torque of the motor and will only reach a speed where that equilbrium is reached.Not quite. If you connect a motor to a volt meter and spin the shaft you will see it can generate a voltage. This voltage is called the motor Back EMF and it depends on how fast you spin it. When power is applied to such a motor the motor accelerates until the back EMF is roughly equal to the supply voltage. The back EMF also depends on the number of turns on the windings and the strength of the magnets. This relationship between voltage and speed is called the Motor velocity constant or back EMF constant and is given the symbol Kv. It has the units rpm/volt. If the voltage is increased the motor will spin faster.
The current drawn depends mainly on the load on the motor. If the motor was an ideal motor and had no load then once up to speed the current would fall to zero. Adding a load increases the current drawn by the motor. If the motor is an ideal motor the speed would remain constant despite increased load. Real world motors have losses caused by the resistance of the windings, friction and air resistance etc. These all conspire to mean the speed isn't constant and will vary with increasing load. As the load is increased the motor will slow down until at some point it cannot turn the load and it stalls. If you want the motor to maintain speed you will have to increase the voltage.