In polar coordinates, p = 1 - sin(theta)
cardio cardilio carding cardlingoking cardiko cardiod cardint
The helicopter main rotor blades have an airfoil shape like an airplanes wing. The entire blade can also be angled by the pilot,through the rotor head. This angle makes it fly or lift.
The size and shape define what the rotor will lift.
A cardioid microphone is a directional mic: one that picks up more sound from the front than from the rear. The word "cardioid" means "in the shape of a heart". When the response pattern of such a directional microphone is plotted on a polar (360 degree) grid, it looks roughly like a heart.
Omni directional microphones cannot be changed to cardiod microphones. Even if you drill back holes behind the diaphragm.
ok actually i am looking for the answer also but this is what i have got so far,you can understand cylindrical rotor in comparison to Salient pole machines. In cylindrical rotor, as it rotates, the air gap between the rotor and stator doesnt change due to its cylindrical shape, but for salient pole machine, due to its shap, the air gap changes as it rotates, due to those dents(laminations) and since air gap is fixed for cylindrical rotor,the magnetic path reluctance is independent in respect to its position to magnetic poles
Because there is no current flowing in the rotor, and thus there is no magnetic field in the rotor, and thus there is no torque between the rotor and the field.
What is a rotor?
the blade is called rotor bladesThe rotor blades on top are called Main Rotor Blades, because they are the main source of lift for the helicopter. The smaller rotor blades on the tail are called Tail Rotor Blades.
Wound rotor and squirrel-cage rotor
The rotor head changes the angle of incidence of the rotor blades as they rotate.