chapter 1 helicopter fundamentals Test 3

In a NOTAR helicopter the redirection of the main rotor downwash to counter-act torque is the classic application of the

Coanda effect

Movement of the helicopter around the____ axis is called roll.

Longitudinal

Movement of the helicopter around the axis produces a nose-up or nose-down attitude, or___

Lateral Axis, Pitch

Movement of the helicopter around the _____axis produces a change in direction to the right or left called _

Vertical, yaw

Circle one; (TRUE/FALSE ) The Upper Swash Plate rotates the same direction with the main rotor hub and the Lower Swash Plate rotates in the opposite direction to counteract torque.

False

An _____is simply molded, rubber-like material bonded to the appropriate part that allows proper movement.

Elastomeric bearing

The free-wheeling unit, that enables a helicopter to autorotate, comes in different forms, with the most popular being the

Sprag clutch

The type of Main Rotor Head where the blades are rigidly interconnected and pivot about a point slightly above their center is called ____

Semi rigid

Which of these stops accidents from tail rotor, strikes by eliminating the tail rotor all together

Notar

Which of these are used in coordination to regulate the airspeed?

Collective pitch control and cycle pitch control

The change of a helicopter from the hover to flying is called?

Transition

The torque effect is the tendency of the helicopter to rotate in the opposite direction the main rotor because of newton's?

The third law motion

Blades that can lead and lag individually during rotation are characteristic of which type of the tail rotor hub?

Fully articulated type

With a helicopter in a motionless hover the tail rotor wants the helicopter to drift in the direction which it is producing anti-torque thrust. This is called?

Translating tendency

To change the angle of attack of the blades, move the:

Cyclic control stick

A fully articulated rotor head gets its name because it is:

Jointed

Which of these tail rotor types is safer both on the ground and in flight because of a fan should?

Fenestron

Essay
Describe, in detail, the operation of the Collective Pitch Control and how it operates from the cockpit up to the main rotor.

Raising the collective pitch control increases the pitch of the main rotor.

Describe, in detail, the operation of the Cyclic Pitch Control and how it operates from the cockpit up to the main rotor.

Moving the cycle control stick changes the angle of attack of the blade

How and why is a helicopter able to autorotate (glide) to the ground.

The free-wheeling unit allows the engine to drive the rotors but bit the rotors to drive the engine.