the limitations of rotor spinning are................
1. successive count range up to 40 Ne,
2. strength is lower in compare to ring spinning,
3. the cotton should be clean,
4. variation in twist,
5. the luster is duller.
A rotor.
The spinning rotor lifts it. The rear rotor stabilises it.
Rotor
Locked rotor current is the amount of current a motor would draw if you energize the motor and the rotor (the spinning shaft) doesn't spin.
The back rotor of the helicopter counters the force applied to the body of the helicopter by the main rotor by applying thrust in the same direction as the main rotor. The force from the main rotor is applied in the opposite direction the main rotor is spinning. So say the force the main rotor was exerting on the body of the helicopter was causing the tail to move left then the back rotor would be designed to apply an equal force pushing the tail right to keep it from spinning. If the back rotor of a helicopter malfunctioned it would begin to spin.
Some helicopters feature a second rotor underneath the first rotor that counters the force applied to the body of the helicopter by applying thrust in the opposite direction of the main rotor. This stops the helicopter from spinning around. Others, instead of a second rotor underneath the first rotor have a back rotor that essentially does the same thing, which is provide a equal force to the first rotor preventing the helicopter from spinning =0
Gunter Trommer has written: 'Rotor spinning'
The rotor blades when spinning creates what is called the rotor disk, the disk is tilted in the direction that the pilot wishes to go.
The main lifting blades make up the rotor
Just take a hammer and bang on it while spinning the rotor. Keep going until if gives.
Wind flows through the rotor blades, causing them to spin. The spinning rotor turns the shaft connected to the generator. The generator converts the mechanical energy from the spinning shaft into electrical energy.
The tail rotor is moving "perpendicular" to the main rotor, not "opposite". The tail rotor creates thrust opposite to the thrust of the main rotor, to keep the fuselage from spinning. Most helicopters spin the main rotor counter-clockwise looking from above, which puts a clockwise rotation on the fuselage. You need a tail rotor pushing the tail counter-clockwise to keep the fuselage pointed in the direction the pilot chooses.