RPL Aerodynamics Section 1-8 Questions

When lift is developed it acts

• Perpendicular to the chord line.

• Perpendicular to the relative airflow.

• Vertically.

• Upwards and backwards.

At low airspeed and high power in a single-engine aeroplane

• All controls are ‘sloppy’ ie less effective.

• The ailerons remain effective, but the elevator and rudder are ‘sloppy’.

• The elevator and rudder remain effective, but the ailerons become ‘sloppy’.

• All controls remain as effective as at higher speeds.

Movement about the longitudinal axis is known as   ________________

• ROLL

• YAW

• PITCH

• SPIN

Movement in the lateral plane ie about the normal axis is known as ________

• ROLL

• YAW

• PITCH

• SPIN

The aspect of ratio of a wing is defined as the ratio of

• Lift to drag.

• Span to chord.

• Thickness to span.

• Area to chord squared.

Bernoulli’s Principle says

• Increased velocity in a streamline flow means decreased dynamic pressure.

• Increased velocity in a streamline flow means decreased static pressure.

• Increased velocity in a streamline flow means increased static pressure.

• Dynamic and static pressure both remain constant in a streamline flow.

A secondary effect of aileron is

• Yaw about the normal axis.

• Roll about the normal axis.

• Yaw about the longitudinal axis.

• Roll about the longitudinal axis.

If the elevator trim tab is deflected up, which way will the aircraft’s nose move?

• UP

• DOWN

Slipstream effect is most noticeable

• When full power is applied in normal light.

• During a climbing turn to the right.

• When full power is applied at a very low airspeed.

• Only during the take-off roll.

In steady straight and level flight

• Lift equals drag.

• Lift equals weight.

• Lift is greater than weight.

• Thrust is greater than drag.