Principles Of Flight Flashcards
What is the formula and unit for wing loading?
Aircraft weight / wing area
Unit = N/m^2
What is the formula for load factor?
Lift / weight
What is CAS?
IAS corrected for:
position error
instrument error
What is EAS?
CAS corrected for:
compressibility error
What is TAS?
EAS corrected for density error
What is the formula aspect ratio?
Span^2 / wing area
What is mean aerodynamic chord?
The chord of a rectangular wing with the same moment and lift
What is the chord line?
Straight line joining leading and trailing edges
What is the mean camber line?
A line equidistant between the upper and lower surfaces of a wing
Define angle of attack?
The angle between the RAF and the chord line
Define the angle of incidence
The angle between the longitudinal axis and the chord line
Define the pitch angle?
Angle between the longitudinal axis and the horizontal
What is the centre of pressure?
The point at which the force of lift acts through
Where is the aerodynamic centre?
Approx 25% chord line
List the types of drag
Form
Skin friction
Interference
Induced
What is the lift formula?
L = 0.5p(v^2)SCl
Where p = rho
What are the primary and secondary effects of elevators?
Primary = pitch Secondary = none
What are the primary and secondary effects of rudder?
Primary = yaw Secondary = roll (to the same side)
What are the primary and secondary effects of ailerons?
Primary = roll Secondary = adverse yaw (caused by increased induced drag on high wing)
Where is the speed for best endurance found for a prop?
Vmp
Where is Vx found for a prop?
Approx Vmp
What speed is preferable when wishing to clear an obstacle?
Vx
What affect does HWC and TWC have on climb gradient?
HWC = increases TWC = decreases
What factors increase stall speed?
Increased weight
Forward C of G
Higher load factor
No flaps
