Chapter 1.2 - PPL Aerodynamics Flashcards
Name the three Axis of an Aircraft?
- Longitudinal.
- Lateral.
- Normal.
What movement and controls are used for Longitudinal Axis (2)?
- Roll.
- Ailerons.
What movement and controls are used for Lateral Axis (2)?
- Pitch.
- Elevators.
What movement and controls are used for Normal Axis (2)?
- Yaw.
- Rudder.
Longitudinal, Lateral and Normal Axis connects through which point in an Aircraft?
Centre of Gravity.
Longitudinal Stability is the stability of the Aircraft for which motion?
Pitching.
Which axis is used for Longitudinal Stability?
Lateral Axis.
What main factor affects Longitudinal Stability of an Aircraft?
Horizontal Stabiliser (Tailplane).
Directional Stability is the stability of the Aircraft for which motion?
Yawing.
Which axis is used for Directional Stability?
Normal Axis.
What main factor affects Directional Stability of an Aircraft?
Vertical Stabiliser (Fin).
Directional Stability is also known as what?
Weathercocking effect.
Define Weathercocking?
The tendency of the Aircraft’s nose always pointing to the wind.
Lateral Stability is the stability of the Aircraft for which motion?
Rolling.
Which axis is used for Lateral Stability?
Longitudinal Axis.
What main factor affects Lateral Stability of an Aircraft?
Wing Dihedral.
What’s the percentage difference between the Minimum Power Speed and Minimum Drag Speed? This speed is also known as what (2)?
- 24% less.
- Maximum Endurance Speed.
What terms are given when control forces must be increased/reduced (2)?
- Anti-Balance Tabs.
- Balance Tabs.
Name two types of Trim Tabs?
- Fixed Trim Tab.
- Cockpit Controlled Trim Tabs,
Name four factors which causes the Aircraft to ‘swing’ during Takeoff?
- Slipstream Effect.
- Propeller Torque.
- Gyroscopic Effect.
- Asymmetrical Blade Effect.
During Takeoff, how does Slipstream affect the Aircraft and how can a Pilot minimise this affect?
- Yaws to the Left.
- By applying Right Rudder.
True or False. Weight affects Glide Distance and Angle?
False.
What happens to the Glide Angle during Headwind?
Increases.
What happens to the Glide Angle during Tailwind?
Decreases.
How many degrees per second is a Rate 1 turn?
3°.
How many degrees per second is a Rate 2 turn?
6°.
How many degrees per second is a Rate 3 turn?
9°.
How many degrees per second is a Rate 4 turn?
12°.
