RPL Aerodynamics Section 9-15 Questions

If an aeroplane has negative stability, this indicates that once disturbed it will

• Move back towards its original position.

• Stay at its new position.

• Keep moving further away from its original position.

• Go Inverted.

Longitudinal stability is provided by the tail plane and enhanced by a

• Forward CoG

• Aft CoG

In a piston-engine aircraft, maximum endurance is achieved by flying at the IAS which

• Uses least power.

• Creates the minimum total drag.

• Is the slowest possible for straight and level flight.

• Requires the smallest angle of attack for level flight.

In a piston-engine aircraft, maximum range is achieved by flying at the IAS which

• Uses least power.

• Creates the minimum total drag.

• Is the slowest possible for straight and level flight.

• Requires the smallest angle of attack for level flight.

An aeroplane has wing dihedral built into it to

• Improve longitudinal stability.

• Improve lateral stability.

• Decrease lateral stability.

• Improve directional stability.

In a steady climb:

• Lift exceeds weight and thrust exceeds drag.

• Lift exceeds weight and thrust is less than drag.

• Lift is less than weight and thrust is less than drag.

• Lift is less than weight and thrust exceeds drag.

What changes in the control of an aircraft must be made to maintain altitude when airspeed is being decreased?

• The AoA must be increased to compensate for the decreasing lift caused by the reduction in airspeed.

• The AoA must remain the same.

• The AoA must be increased to produce more lift than weight.

• The AoA must be decreased.

      In straight and level flight, minimum thrust is required

• At the lowest possible flying speed.

• At the speed where the total drag is least.

• At the speed where parasite drag is least.

• At the speed where induced drag is a minimum.

      Which statement is true relating the effect of low level windshear on aeroplane performance?

• A headwind which shears to a tailwind causes the aeroplane to pitch up.

• A headwind which shears to a tailwind causes an initial decrease in airspeed.

• A tailwind which shears to a headwind causes the aeroplane to pitch down.

• A tailwind which shears to a headwind causes an initial decrease in airspeed.

Which airspeed is the best to fly at to clear obstacles after take-off?

• Best rate of climb speed.

• Cruise climb speed.

• Best angle of climb airspeed.

• Minimum controllable climb airspeed.