Question

Vortex Generation from Helicopters will be severe immediately following point of rotation when rotor downwash trails ____ and ____ the helicopter.

Answer 1

Helicopters have two sets of lifting blades that rotate in opposite directions to counteract torque and maintain stability.

Step-by-step explanation:

When a helicopter has two sets of lifting blades that rotate in opposite directions, it helps to counteract the torque created by the spinning of the blades. This torque, according to Newton's third law, would cause the body of the helicopter to rotate in the opposite direction of the blades. By having the blades rotate in opposite directions, the torque is balanced and the helicopter remains stable.