Part 2

Question 1

What do you call the vertical etches that intermesh with transmission gears on the mast?

Answer 1

Splines

Question 2

Where is the mast usually located, relative to the aircraft’s weight and balance?

Answer 2

Within the C of G

Question 3

_________ is the twisting force caused by counter-torque that acts on the mast

Answer 3

Torsion

Question 4

______________ is the force caused by the weight of the Rotor Hub assembly

Answer 4

Compression

Question 5

The mast is a critical item, and in some instances has a ________ _______

Answer 5

Finite Life

Question 6

What is this device called?

Answer 6

Stabilizer bar

Question 7

________ ______ is the angle between the chord line of the blade and a reference plane

Answer 7

Pitch Angle

Question 8

_______ is the distance from the leading edge to the trailing edge

Question 9

Lift is ___________ to relative wind

Answer 9

Perpendicular

Question 10

Drag is _________ to relative wind and __________ to lift

Answer 10

Parallel,Perpendicular

Question 11

The preset angle for airplane wings is called the…?

Answer 11

Angle of incidence

Question 12

What is the universal letter for RPM?

Answer 12

‘N’

Question 13

What is N_r?

Answer 13

Main rotor RPM

Question 14

____

Question 15

_______ ________ is a condition that can cause damage to the tail on longer bladed helicopters

Answer 15

Blade Droop

Question 16

Centrifugal force depends on which two factors?

Answer 16

Weight of the blade and its velocity

Question 17

Coning is caused by the _______ of the helicopter

Answer 17

Weight

Question 18

If the blades are out of track, what do you adjust?

Answer 18

Pitch links

Question 19

The rotor speed ________ from the blade outwards

Answer 19

Increases

Question 20

In a no-wind hover, lyft is ____________ over the entire rotor disc

Answer 20

Symmetrical

Question 21

In forward flight, the advancing half of the disc produces ______ lift than the retreating half, causing _______________ ___ _______

Answer 21

More, Dissymmetry of lift

Question 22

Helicopter forward speed is limited because of…

Answer 22

Dissymmetry of lift

Question 23

To compensate for dissymmetry of lift, what can helicopter blades do?

Answer 23

Flap, lead and lag

Question 24

Why can’t heliciopters fly fast?

Answer 24

Because of dissymmetry of lift

Question 25

**Why does the advancing side get more lift?**

Answer 25

Greater relative wind

Question 26

**How do you counteract dissymmetry of lift?**

Answer 26

Flapping hinge

Question 27

According to Mr.Baugh, "When the blade flaps up....?

Answer 27

...it Spills some lift"

Question 28

Blade Lead/lag is accomplished through a ________ \_\_\_\_\_\_

Answer 28

Vertical Hinge

Question 29

In a fully ariculated main rotor head, there are ______ axis of rotation

Answer 29

Three

Question 30

The Speed change in an object getting smaller is called __________ \_\_\_\_\_\_\_\_

Answer 30

Coreolis effect

Question 31

Another name for the Coreolis effect is the ________________ \_\_\_\_ ___________ \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Answer 31

Conservation of angular momentum

Question 32

Coreolis Effect is the result of ________ \_\_\_\_\_\_\_\_\_\_

Answer 32

Blade Flapping

Question 33

On a semi-rigid helicopter, the blades are kept below the C of G to prevent the coreolis effect, this design is called the __________ \_\_\_\_\_\_\_\_

Answer 33

Underslung Design

Question 34

\_\_\_\_\_\_\_ ___________ prevents droop when blades are at rest

Answer 34

Droop Restraints

Question 35

What does the grip do?

Answer 35

Holds on to the blade through the blade bolt

Question 36

What is the purpose of the yoke?

Answer 36

Carries the load of the blades

Question 37

Lead/Lag has to be \_\_\_\_\_\_\_\_\_\_

Answer 37

Dampened

Question 38

Which orientation is the flapping hinge?

Answer 38

Horizontal

Question 39

\_\_\_\_\_\_ ___________ is dampening vibrations from blade lead/lag, flapping by using a mass

Answer 39

Mass Dampening

Question 40

Under normal conditions, with the stick trim off, is there artificial feel?

Answer 40

No, there isn't any artificial feel

Question 41

Which component can also give you trim?

Answer 41

Magnetic brake