POF 251-300

Which statement is correct? 1) A propeller with a small blade angle is referred to as being in coarse pitch. 2) A propeller with a large blade angle is referred to as being in fine pitch.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is correct.

• 1) is incorrect, 2) is incorrect.

• 1) is correct, 2) is incorrect.

The primary purpose of equipping the power assisted flying control systems with trim capability is to:

• allow the pilot to maintain control in case of hydraulic failure.

• relieve stresses on the trim tab.

• relieve stresses on the hydraulic actuators.

• bring the control forces to zero in steady flight.

An aeroplane maintains straight and level flight while the speed is doubled. The change in lift coefficient will be:

• x 0.25

• x 2.0

• x 0.5

• x 4.0

In straight and level flight at a speed of 1.8 Vs, the lift coefficient, expressed as a percentage of its maximum (CLMAX), would be:

• 324%

• 31%

• 180%

• 56%

If the straight and level stall speed is 100 kts, what will be the stall speed in a 1.3 g turn?

• 114 kts

• 130 kts

• 81 kts

• 100 kts

Given an initial condition in straight and level flight with a speed of 1.4 Vs. The maximum bank angle attainable without stalling in a steady co-ordinated turn, whilst maintaining speed and altitude, is approximately:

• 32°

• 44°

• 60°

• 30°

Stalling speed in a 15° bank level turn is 60 kts. The stalling speed in a 45° bank level turn will be:

• 60 kts

• 85 kts

• 70 kts

• 83 kts

The frontal area of a body, placed in a certain airstream is increased by a factor 3. If the shape does not alter, the form drag will increase by a factor of:

• 1.5

• 9

• 6

• 3

The Mach number is 0.8 and the TAS is 400 kts. What is the speed of sound?

• 480 kts

• 320 kts

• 500 kts

• 600 kts

The value of the manoeuvre stability of an aeroplane is 150 N/g. The stick force required to achieve a load factor of 25 from steady level trimmed flight is:

• 150 N

• 375 N

• 450 N

• 225 N