10 Quiz FLIGHT MECHANICS

Given: Aeroplane mass: 50 000kg. Lift/Drag ratio: 12. Thrust per engine: 60 000N. Assumed g: 10m/s². For a straight, steady, wings level climb of a twin engine aeroplane, the one-engine inoperative climb gradient is:

• 14%.
• 3.7%.
• 11.7%.
• 15.7%.

In a steady straight climb at climb angle 'gamma', the lift of an airplane with weight W is approximately:

• W * cos (gamma)
• W * (1-sin (gamma))
• W / cos (gamma)
• W * (1-tan (gamma))

In a climb (Climb angle = 90 degrees):

• Lift = Weight
• Thrust = Drag
• Thrust = Drag + Weight
• Lift = Weight + Drag

If an aeroplane carries out a descent at 160 kt IAS and 1000 ft/min vertical speed:

• lift is less than drag.
• lift is equal to weight.
• weight is greater than lift.
• drag is less than the sum of the forces in the direction of flight.

Given the following information, calculate the Lift for an aircraft in a straight and steady power-on descent with an angle of 30°. Weight: 11350 kg Thrust: 8450 kg Drag: 11010 kg

• 7318 kg
• 11350 kg
• 9829 kg
• 5675 kg

What decreases the maximum ground distance during a glide with zero thrust?

• A decrease in aeroplane mass with zero wind.
• A tailwind with constant aeroplane mass.
• An increase in aeroplane mass with zero wind.
• A headwind with constant airplane mass.

In a skidding turn (the nose pointing inwards), compared with a coordinated turn, the bank angle (I) and the ball or slip indicator (II) are respectively:

• (I) too small, (II) displaced towards the high wing.
• (I) too large, (II) displaced towards the high wing.
• (I) too small, (II) displaced towards the low wing.
• (I) too large, (II) displaced towards the low wing.

What is the approximate radius of a steady, level, co-ordinated turn with a bank angle of 30 degrees and a TAS of 500 kt?

• 12 km.
• 24 km.
• 10 km.
• 7 km.

With a twin engined aircraft with both propellers rotating clockwise, if the right engine fails, the direction of yaw at low speed will be to (1) and the critical engine will be (2):

• (1) The left (2) Left
• (1) The left (2) Right
• (1) The right (2) Right
• (1) The right (2) Left

What is the most efficient way to fly with a failed engine on a twin piston engine airplane?

• Slight bank angle towards the dead engine and rudder towards the good engine.
• Slight bank angle towards the good engine and rudder towards the dead engine.
• Slight bank angle and rudder towards the good engine.
• Wings level and rudder to good engine.