A103 Aerodynamic Principles Flashcards
The ____ is the part of the aerofoil which first meets the airflow
Leading Edge
The ____ is the part of the aerofoil where the upper and lower airflows meet
Trailing Edge
The ____ is the characteristic curve of the aerofoils upper and lower surfaces
Camber
What are the 4 forces of flight
Lift
Weight
Thrust
Drag
What are the factors affecting lift?
Bernoulli’s Principle (pressure differences)
Newton’s Third Law (action - reaction)
The ____ is defined as the angle of the aerofoil in relation to the relative wind
Angle of Attack
From the lift formula we understand that the (faster/slower) we go, the (more/less) AoA we need
The faster we go, the less AoA we need
The slower we go, the more AoA we need
An aircraft in equilibrium is in ____ , ____ , and ____ flight
Straight, level and unaccelerated flight
The DA-20 has ____ flaps
Slotted Flaps
The two types of drag are:
Parasite
Induced
Which type of drag is most effective at high speed?
Parasite drag
What are thee types of parasite drag?
Form
Interference
Skin friction
Which type of drag is most effective at low speed?
Induced drag
Induced drag is greatest when the aircraft is ____ , ____ & ____ .
Heavy, slow & clean
Define a stall
Stall speed increases with:
The three types of stalls are:
Power-off stalls
Power-on stalls
Accelerated stalls
What creates a spin?
A combination of stall and yaw
Name the 3 axes of rotation
Vertical / Yaw
Longitudinal / Roll
Lateral / Pitch
Which control surface creates roll
Ailerons
Which control surface creates pitch
Elevator
Which control surface creates yaw
Rudder
How does an airplane turn?
The horizontal component of lift
Define Adverse Yaw
The outside wing in a turn produces more lift and more drag resulting in yaw towards the outside of the turn
Define Load Factor
The ratio of the load supported by the wings to the actual weight of the aircraft (including contents)
Define maneuvering airspeed
What are the 4 turning tendencies?
Define Torque as a turning tendency
Define Asymmetrical Thrust (P-factor)
Define Spiraling Slipstream
What is Weight?
A downward force caused by gravity
What is thrust?
Forward force necessary to overcome drag
