30 Questions
What is the purpose of washout on a wing?
To compensate for the higher levels of loading experienced at the wing tips
What is the upward inclination of a wing from the root to the tip?
Dihedral
What is the formula for lift?
½RV²SCL
What is the angle of attack?
The angle between the chord line of an aerofoil and the relative airflow
What is the coefficient of lift (CL)?
The lifting ability of a particular wing
What is anhedral?
The downward inclination of a wing from the root to the tip
What is the primary reason for the difference in drag curve between a jet aircraft and a piston aircraft?
Swept wings are designed to achieve high cruise speeds
How does the drag curve of a jet aircraft compare to that of a piston aircraft?
It is flatter and has a smaller total drag range
What is the effect of the swept wing design on the lift capabilities of a jet aircraft?
It decreases the lift capabilities at low speeds
What is the relationship between induced drag and lift?
Induced drag is proportional to lift
What is the primary reason for imposing a reduced Mach maximum operating speed in the event of a Mach trimmer failure?
To maintain a margin below the Mach speed at which instability occurs
What is the consequence of the flatter total drag curve on a jet aircraft?
A vague lack of speed stability
What is the main characteristic of the drag curve on a jet aircraft?
It is flatter and has a smaller total drag range
What is the result of compressibility on an airfoil?
A disturbance in the pressure pattern and shock-wave/drag effect
What is the main effect of compressibility on flight instruments?
An overread error on the air speed indicator
What is the critical Mach number associated with?
The shock-wave/drag effect on the wing
What is the difference between VNO and VNE?
VNO is the normal operating speed, while VNE is the never exceeded speed
What is the purpose of a speed margin?
To allow for aircraft testing at higher speeds
What is the top end of an aircraft's speed range determined by?
VDF/MDF speed
What is the lower speed limit of an aircraft's maneuverability margin/envelope?
1.2/3 VS speed
What occurs at an aircraft's absolute ceiling?
Coffin corner
What is the relationship between IAS and Mach number?
IAS decreases with altitude, Mach number increases
Why does the Mach number need to be increased to prevent stall?
To prevent stall speed
What is the relationship between temperature and LSS?
LSS decreases with temperature
What is the primary purpose of a yaw damper in an aircraft?
To supplement Dutch roll control
What is the main difference between a parallel yaw damper and a series yaw damper?
The way it moves the rudder pedals
What is the advantage of a series yaw damper over a parallel yaw damper?
It does not increase rudder foot forces
In what scenario would a parallel yaw damper typically be switched off?
During takeoffs and landings
What is the relationship between a roll damper and spiral stability?
A roll damper is associated with providing spiral stability
What is the visual indication of a parallel yaw damper's serviceability?
Rudder bar activity
Test your knowledge of aircraft wing design, including angle of attack, washout, dihedral, and anhedral.
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