review 9

Question 1

Many tail rotors are fitted with a delta-3 hinge which ___ flapping amplitude because as the blade flaps, it also _____

Answer 1

reduces

feathers

Question 2

You note rotor RPM is and manifold is high. To correct

Answer 2

lower collective

Question 3

The principal means of providing engine cooling of helicopter engines is through

Answer 3

engine driven fan

Question 4

An underslung rotor system ____ movement of blade center of gravity from the _____ during flapping

Answer 4

restricts

axis of rotation

Question 5

A helicopter can tolerate a strong crosswind from the _____better than from the ______because the tendency to yaw will be in the same direction as main rotor torque

Answer 5

Left
Right
Right

Question 6

When crossing a mountain ridge into a strong headwind, you should cross at a

Answer 6

oblique angle (no 90)

Question 7

If there is an inversion above your planned cold mountain landing site, you should anticipate that translational lift will _____ as you descend through the inversion

Answer 7

decrease

Question 8

In strong wind, at a low flight level, the _____side of the mountain will have rotor turbulence.

Answer 8

leeward

Question 9

Flying a helicopter in rain a few feet below the freezing level (can/cannot) result in ice forming on the rotor blades because the area (reduced/ increased) pressure above the blades is associated with (higher/lower) temperatures than the environment temperature.

Answer 9

CAN
Reduced
lower

Question 10

The initial build-up of ice normally occurs in the ___
region of the blades and since this is the blade’s ____
region during an autorotation. A safe auto is not possible

Answer 10

middle

driving

Question 11

Above 20F or -6C the tip region of blades are generally clear of ice because of____ heating due to local ____speed

Answer 11

kinetic

high