Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
What are the 5 symptoms approaching the stall?
|
High Nose attitude,
Low & decreasing airspeed, Aural Warnings, The Buffet, Light/ less effective controls |
|
|
What are the four factors affecting stall speed?
|
WILPS
|
|
|
What are the six factors affecting wing drop stalls?
|
Weight, Ice,
Turbulence, Rigging, Power/Slipstream, Pilot Induced. |
|
|
What are the four steps to recover from a stall?
|
Check forward,
Full Power, Prevent yaw with rudder, Confirm ailerons neutral. |
|
|
What are the two instruments that remain reliable in a spin?
|
Turn Coordinator,
ASI, |
|
|
How do you recover from a spin? (7steps)
|
Close throttle,
Confirm spin direction, Full opposite rudder to stop yaw, Pause, Forward elevator, Neutralise rudder, Ease out of dive. |
|
|
What is aspect ratio?
|
The ratio of wingspan to chord.
|
|
|
When flaps are lowered what happens to the lift-drag ratio?
|
It is always reduced!
|
|
|
When trailing edge flaps are lowered does the stalling a.o.a increase or decrease?
|
Stalling a.o.a decreases.
|
|
|
What is the main function of a slat?
|
To prolong the lift curve by delaying the stall until a higher a.o.a
|
|
|
The ideal aerofoil requires which 6 properties?
|
High max CL
Low min CD High MAX CL : Min CD ratio Good lift:drag ratio Sufficient depth Small & stable movement of c.o.p |
|
|
What axis does longitudinal stability act around?
|
The lateral axis (wing tip to wing tip).
|
|
|
Which two stabilities are interrelated?
|
Lateral and directional.
Yaw & Roll |
|
|
Factors affecting longitudinal stability (pitch):
|
Longitudinal diherdral,
Elevator, Position of C.O.G Movement of C.O.P Sweepback with washout, Downwash from mainplane |
|
|
Factors affecting lateral stability (roll):
|
Diherdral angle of main planes
Lateral dihedral, low c.o.g Sweepback, High Fin surface, Blanketing |
|
|
Factors affecting directional stability (Yaw):
|
Size & Distance from C.O.G,
|
|
|
Spiral instability is directionally and laterally stable or unstable?
|
directionally stable,
laterally unstable. |
|
|
Oscillatory Instability is directionally and laterally stable or unstable?
|
Directionally unstable,
Laterally stable. |
|
|
What 5 factors affect swing on takeoff?
|
Slipstream,
Torque, Crosswind, Gyroscopic Effect, Assymetric blade effect. |
|
|
What factors reduce adverse yaw?
|
Frise Ailerons,
Differential Ailerons. |
|
|
What are frise ailerons?
|
When the bottom of the flap protrudes into the airflow.
|
|
|
Why are controls aerodynamically balanced?
|
To make the controls more responsive to the pilot.
|
|
|
Why do we trim?
|
To allow hands off flying.
|
