COMMERCIAL KINGS SCHOOL
Air flowing over the top of the wing moves...? - Answer- Faster
Which part of the airfoil has relatively low pressure? - Answer- Top side of airfoil
Which part of the airfoil has relatively high pressure? - Answer- Bottom side of airfoil
What creates lift? - Answer- High pressure below the wing, with low pressure above the wing
The pressure differential is what creates lift
What is the Angle of attack? - Answer- The angle between chord line and relative wind
The angle of attack directly controls? - Answer- Lift, drag and airspeed
When AOA is increased, what factors increase? - Answer- Lift and drag are increased
Critical angle of attack? - Answer- Highest AOA where air flows smoothly over the wing
Laminar flow? - Answer- a smooth airflow over the airfoil
A loss of laminar flow over the wing results in...? - Answer- A stall
The AOA of wing directly controls the...? - Answer- Distribution of pressures acting on a wing
In unaccelerated flight, there is a corresponding indicated airspeed for every...? - Answer- AOA to
generate lift
At higher altitudes, the airplane must be flown at a higher...? - Answer- TAS for any given AOA
Reaching the critical AOA means the wing will...? - Answer- Continue to have smooth airflow
Critical AOA is the same regardless of...? - Answer- Weight
Dynamic pressure
Bank angle
Pitch attitude
Indicated stalling speeds are affected by...? - Answer- Weight
Load factor (G's)
Power
The Critical angle of attack never...? - Answer- Changes
The airplane will always stall at the same Critical AOA, but changes in weight, load factor and
power will result in the aircraft reaching the CAOA at a...? - Answer- Lower indicated airspeed
Will turbulence change your stall speed? - Answer- Yes, it changes load factor
,Frost on the wing will cause the airplane to stall at an AOA...? - Answer- Lower than normal
Wing planforms? - Answer- The shape and layout of the wing
Rectangular wing planforms tend to stall...? - Answer- Near the root, with the stall progressing to
wingtips
The need to slow aircraft below Va is brought by which weather phenomenon? - Answer-
Turbulence, with an increase in stall speed
The stalling speed of an airplane is most affected by...? - Answer- Variations in airplane loading
Primary flight controls? - Answer- Ailerons, Rudder, Elevator
Secondary flight controls? - Answer- Flaps
Trim
What is the main purpose of flaps? - Answer- Provide same lift at slower airspeed
What affect do flaps of have aerodynamic ability? - Answer- Increased drag
Increased lift
What is the purpose of trim? - Answer- To relieve control pressures
Trim tab? - Answer- Maintains same position relative to elevator
Servo tab? - Answer- Moves in opposite direction of movement
assists in moving primary control surfaces
Anti servo tab? - Answer- Tab moves in same direction as control surface
Prevents control surface from moving full deflection
What is the purpose of spoilers? - Answer- Increase Drag to slow down
Four forces working on an aircraft? - Answer- Thrust
Drag
Lift
Weight
Thrust? - Answer- The force applied to propel an object in a certain direction
Drag? - Answer- Force that acts parallel to both relative wind and flight path of aircraft
Lift? - Answer- Force perpendicular to relative wind
Weight? - Answer- Acts towards the center of the Earth
In steady flight, the forces are are...? - Answer- Equal to each other
Induced drag is a...? - Answer- By product of lift
, Greatly affected by changes in airspeed
Induced drag decreases as...? - Answer- Speed increases
Parasite drag increases as...? - Answer- Speed increases
L/D? - Answer- Lift-to-drag ratio
If the airspeed of a plane is doubled in level flight, parasite drag will become...? - Answer- Four
times greater
If AOA remains constant, but airspeed is doubled, the lift produced at higher speed will be...? -
Answer- Four times greater than at lower speed
What does L/D tell us? - Answer- The gliding ration
If you have an L/D of 11:1, what does that tell us? - Answer- Airplane will go forward 11 feet for
each foot it descends
Slipstream effect? - Answer- Prop is moving and creating a slipstream around your airplane
Slipstream from prop makes airplane want to yaw left, how is this counteracted? - Answer- Right
rudder
Which way does prop sping? - Answer- Clockwise
Static stability? - Answer- How an aircraft responds to disturbance initially
Dynamic stability? - Answer- how an airplane responds over time to a disturbance
Why are airplanes built with the tail wanting to go down? - Answer- Helps with pitch stability
The farther forward the CG, the what type of force needs to be applied on the tail? - Answer- More
downward force
The farther aft the CG, the what type of forced needs to be applied on the tail? - Answer- Less
downward force
Longitudinal stability? - Answer- Stability about the airplane's lateral axis; pitching tendency.
Controlled by elevator
Three kinds of stability? - Answer- Positive
Negative
Neutral
Positive static stability? - Answer- Nose attitude initially returns to original position after
disturbance
Negative static stability? - Answer- Nose attitude continues away from original position after
disturbance
Air flowing over the top of the wing moves...? - Answer- Faster
Which part of the airfoil has relatively low pressure? - Answer- Top side of airfoil
Which part of the airfoil has relatively high pressure? - Answer- Bottom side of airfoil
What creates lift? - Answer- High pressure below the wing, with low pressure above the wing
The pressure differential is what creates lift
What is the Angle of attack? - Answer- The angle between chord line and relative wind
The angle of attack directly controls? - Answer- Lift, drag and airspeed
When AOA is increased, what factors increase? - Answer- Lift and drag are increased
Critical angle of attack? - Answer- Highest AOA where air flows smoothly over the wing
Laminar flow? - Answer- a smooth airflow over the airfoil
A loss of laminar flow over the wing results in...? - Answer- A stall
The AOA of wing directly controls the...? - Answer- Distribution of pressures acting on a wing
In unaccelerated flight, there is a corresponding indicated airspeed for every...? - Answer- AOA to
generate lift
At higher altitudes, the airplane must be flown at a higher...? - Answer- TAS for any given AOA
Reaching the critical AOA means the wing will...? - Answer- Continue to have smooth airflow
Critical AOA is the same regardless of...? - Answer- Weight
Dynamic pressure
Bank angle
Pitch attitude
Indicated stalling speeds are affected by...? - Answer- Weight
Load factor (G's)
Power
The Critical angle of attack never...? - Answer- Changes
The airplane will always stall at the same Critical AOA, but changes in weight, load factor and
power will result in the aircraft reaching the CAOA at a...? - Answer- Lower indicated airspeed
Will turbulence change your stall speed? - Answer- Yes, it changes load factor
,Frost on the wing will cause the airplane to stall at an AOA...? - Answer- Lower than normal
Wing planforms? - Answer- The shape and layout of the wing
Rectangular wing planforms tend to stall...? - Answer- Near the root, with the stall progressing to
wingtips
The need to slow aircraft below Va is brought by which weather phenomenon? - Answer-
Turbulence, with an increase in stall speed
The stalling speed of an airplane is most affected by...? - Answer- Variations in airplane loading
Primary flight controls? - Answer- Ailerons, Rudder, Elevator
Secondary flight controls? - Answer- Flaps
Trim
What is the main purpose of flaps? - Answer- Provide same lift at slower airspeed
What affect do flaps of have aerodynamic ability? - Answer- Increased drag
Increased lift
What is the purpose of trim? - Answer- To relieve control pressures
Trim tab? - Answer- Maintains same position relative to elevator
Servo tab? - Answer- Moves in opposite direction of movement
assists in moving primary control surfaces
Anti servo tab? - Answer- Tab moves in same direction as control surface
Prevents control surface from moving full deflection
What is the purpose of spoilers? - Answer- Increase Drag to slow down
Four forces working on an aircraft? - Answer- Thrust
Drag
Lift
Weight
Thrust? - Answer- The force applied to propel an object in a certain direction
Drag? - Answer- Force that acts parallel to both relative wind and flight path of aircraft
Lift? - Answer- Force perpendicular to relative wind
Weight? - Answer- Acts towards the center of the Earth
In steady flight, the forces are are...? - Answer- Equal to each other
Induced drag is a...? - Answer- By product of lift
, Greatly affected by changes in airspeed
Induced drag decreases as...? - Answer- Speed increases
Parasite drag increases as...? - Answer- Speed increases
L/D? - Answer- Lift-to-drag ratio
If the airspeed of a plane is doubled in level flight, parasite drag will become...? - Answer- Four
times greater
If AOA remains constant, but airspeed is doubled, the lift produced at higher speed will be...? -
Answer- Four times greater than at lower speed
What does L/D tell us? - Answer- The gliding ration
If you have an L/D of 11:1, what does that tell us? - Answer- Airplane will go forward 11 feet for
each foot it descends
Slipstream effect? - Answer- Prop is moving and creating a slipstream around your airplane
Slipstream from prop makes airplane want to yaw left, how is this counteracted? - Answer- Right
rudder
Which way does prop sping? - Answer- Clockwise
Static stability? - Answer- How an aircraft responds to disturbance initially
Dynamic stability? - Answer- how an airplane responds over time to a disturbance
Why are airplanes built with the tail wanting to go down? - Answer- Helps with pitch stability
The farther forward the CG, the what type of force needs to be applied on the tail? - Answer- More
downward force
The farther aft the CG, the what type of forced needs to be applied on the tail? - Answer- Less
downward force
Longitudinal stability? - Answer- Stability about the airplane's lateral axis; pitching tendency.
Controlled by elevator
Three kinds of stability? - Answer- Positive
Negative
Neutral
Positive static stability? - Answer- Nose attitude initially returns to original position after
disturbance
Negative static stability? - Answer- Nose attitude continues away from original position after
disturbance
