99 Recent Questions

Question 1

Where does the minimum glide angle occur?

Answer 1

At the best lift to drag ratio of the wing: CL/CD max

Question 2

When below sea level, how does IAS compare to TAS?

Answer 2

IAS is higher than TAS

Question 3

During a spin what should the ailerons do?

Answer 3

Be kept in the neutral possition

Question 4

What happens to Dynamic Stability (all axis) when altitude increases?

Answer 4

• Dynamic stability decreases

- Due to a reduction in aerodynamic dampening

Question 5

What happens to Static Stability (all axis) when altitude increases?

Answer 5

• Static Stability increases as the CP moves aft

- Generates a bigger moment between the CG and CP

Question 6

For shallow angle of climb how can Sin(gamma)= (T-D)/W be written?

Answer 6

• Sin(gamma) = (T/W) - (CD/CL)
• For shallow climb angles: L = W so:

Sin(gamma) = (T/W) - (D/W)
Sin(gamma) = (T/W) - (D/L)
Sin(gamma) = (T/W) - (CD/CL)

Question 7

Drag is in the direction of and Lift is perpendicular to?

Answer 7

The Relative Air Flow

Question 8

What happens during a negative tail stall?

Answer 8

• An uncontrollable pitch down moment will occur

- As the tail stalls it suffers a reduction in the downward force

Question 9

For Props what types of pitch are more efficient at:

• Low speed
• High speed

Answer 9

• Low speed: Fine Pitch

- High speed: Coarse Pitch

Question 10

What effect on the effectiveness of a control surface does:

• Balance tab
• Anti- Balance tab

Answer 10

• Balance tab reduces effectiveness (along with stick force)

- Anti-Balance tab increases effectiveness (along with stick force)

Question 11

When is it acceptable to exceed Vno?

Answer 11

In clear air (i.e. No turbulence)

Question 12

In supersonic flight which wing has the lower CD, straight or swept?

Answer 12

• Straight wing