MOD 8.2 PART 2

Podcast

Play an AI-generated podcast conversation about this lesson

Download our mobile app to listen on the go

Get App

Questions and Answers

Which of the following is an example of parasite drag?

Induced drag
Profile drag (correct)
Induced drag
Wave drag

How does induced drag change with airspeed?

Induced drag increases linearly with airspeed
Induced drag decreases proportionally to the square of airspeed (correct)
Induced drag increases proportionally to the square of airspeed
Induced drag decreases linearly with airspeed

What causes induced drag?

Wing to body fairings
Spanwise movement of air from the bottom of the wing outward (correct)
Flow interference at the junction of various surfaces
Turbulence produced by skin friction

What is the purpose of winglets on modern aircraft?

To reduce induced drag (C) Signup and view all the answers

What is the relationship between induced drag and airspeed?

Induced Drag decreases with the square of the airspeed (C) Signup and view all the answers

Which forces act on an aircraft in flight?

Lift, weight, thrust, and drag (C) Signup and view all the answers

What is the efficiency factor for total aircraft propulsion?

Thrust to weight ratio (A) Signup and view all the answers

What is the equation for thrust to weight ratio?

$\frac{Thrust}{Weight} = \frac{ma}{mg}$ (B) Signup and view all the answers

Which of the following is true about the angle of attack (AoA)?

All of the above are true about the angle of attack (AoA). (D) Signup and view all the answers

What is the purpose of changing the angle of attack (AoA) of the aerofoil?

To increase the camber of the upper surface in relation to the airflow. (C) Signup and view all the answers

What happens to lift as the angle of attack (AoA) increases beyond the stalling angle?

Lift decreases rapidly. (D) Signup and view all the answers

Which of the following is true about the stall condition in an aircraft?

The stall condition occurs when the dynamic pressure is constant. (C) Signup and view all the answers

Where does the stall occur on the wing?

The stall occurs on the upper surface of the wing. (A) Signup and view all the answers

What is the purpose of a stick shaker in heavy aircraft?

To simulate the effect of turbulent airflow over the elevators. (A) Signup and view all the answers

What is the purpose of a stall strip on an aircraft wing?

To prevent flow separation at the wing tip. (A) Signup and view all the answers

What happens to the aircraft during a wing root stall?

The aircraft rotates to the nose down position. (A) Signup and view all the answers

Which of the following is a dimensionless coefficient that varies with surface finish, fineness ratios, etc.?

CD (C) Signup and view all the answers

What is the portion of the resistance that is due to the formation of eddies and turbulence when air flows past an aircraft?

Form Drag (D) Signup and view all the answers

What is the relationship between the length and thickness of a streamlined body for least resistance?

The length should be between three and four times greater than the maximum thickness (B) Signup and view all the answers

Which of the following variables does the lift and drag forces depend on?

Air density (B) Signup and view all the answers

What is the formula for lift force?

$L = \ 1/2 \cdot \rho \cdot v^2 \cdot S \cdot CL$ (C) Signup and view all the answers

What is the simplest and most basic formula for Drag Profile?

$Dp = \rho \cdot S $ (B) Signup and view all the answers

What happens to the lift produced by an aerofoil beyond 16° angle of attack?

The lift decreases (C) Signup and view all the answers

What is the primary cause of the aerodynamic resultant and hence drag?

Change in dynamic pressure (C) Signup and view all the answers

What causes the decrease in angle of attack (AoA) during a stall recovery?

Increased airspeed (D) Signup and view all the answers

How is the wing twisted to cause 'Wash Out'?

Aerodynamically & Geometrically (B) Signup and view all the answers

Which of the following is the most severe and dangerous form of ice formation on an aircraft?

Glaze ice (A) Signup and view all the answers

What is the main danger of glaze ice formation on an aircraft?

All of the above (D) Signup and view all the answers

What is the effect of ice, snow, rime formation, or other deteriorations on the leading edge and upper surface of the wing?