Fams Ground School Aero #1

Question 1

What is Angle of Attack (AOA)?

Answer 1

Aerodynamic angle between the relative wind and the chord line

Question 2

What is pitch angle?

Answer 2

The mechanical angle between the chordline and tip path plane

Question 3

What is profile drag parallel to?

Answer 3

Relative wind

Question 4

What is the composition of the atmosphere?

Answer 4

• 78% Nitrogen
• 21% Oxygen
• 1% Other gases (including Argon and Carbon dioxide)

by volume

Question 5

What axis is perpendicular to the tip path plane?

Answer 5

Vertical axis

Question 6

What happens to power required as density altitude increases?

Answer 6

As density altitude increases, power required increases as well because the rotor is less efficient

Question 7

In a rotating system, the rotational velocity is least at the ____ and the greatest at the ____ ?

Answer 7

Blade root

Blade tip

Question 8

What type of airfoil/blade does the TH-57 have?

Answer 8

Droop snoot airfoil

Question 9

What two phenomena causes coning?

Answer 9

• Lift
• Centrifugal force

Question 10

What is the lift differential that exists between the advancing and retreating blade known as?

Answer 10

Dissymmetry of lift

Question 11

Disymmetry of lift, when combined with ____ , causes blowback?

Answer 11

Phase lag

Question 12

(T/F) Anti-torque pedals are the main way to change heading in forward flight?

Answer 12

False

Question 13

What is Vne primarily established by?

Answer 13

Structural limitations

Question 14

What would be an indication that power required exceeds power available?

Answer 14

Right yaw

Question 15

The increased AOA on the retreating blade at high forward airspeed may cause what?

Answer 15

Blade stall