Chapter 2 Flashcards
Following a disturbance, an airplane that returns to its original position unassisted by the pilot is said to be inherently stable. Is this sort of airplane easier to fly?
a
If the center of pressure is behind the center of gravity, what sort of pitching moment will the lift-weight couple have?
a
If the thrust line is lower than the drag line, what sort of pitching moment will the thrust-drag couple have?
a
In questions 2 and 3, if there was a sudden loss of thrust, what would the nose do?
a
Where is the center of pressure in relation to the center of gravity in most training airplanes?
a
What sort of aerodynamic force does the horizontal stabilizer product?
a
When power is reduced what will the reduced propeller slipstream and reduced downwash over the horizontal stabilizer cause the nose to do?
a
Longitudinal stability refers to the motion of the airplane about its:
a. longitudinal axis
b. lateral axis.
c. vertical axis (sometimes called the normal axis)
a
What is rotation about the lateral axis known as?
a
What is rotation about the vertical axis known as?
a
What is the most important factor contributing to longitudinal stability?
a
Is longitudinal stability greater with a forward CG?
a
True or false? An airplane loaded with the CG too far aft will be stable at slow speeds, but if stalled will be difficult to recover.
a
Will a forward CG location cause an airplane to be more unstable at high speeds?
a
How can aircraft directional stability be improved?
a
If the airplane is loaded incorrectly so that the CG is forward of the allowable range, the elevator force required to flare the airplane for landing will be:
a. the same as usual
b. greater than usual
c. less than usual
a
If a wing has dihedral or sweepback, which sort of stability is increased?
a
If an airplane is yawed, it will sideslip. What will the dihedral cause it to do?
a
What primary control provides pitch?
a
Nose movement up and down occurs in which plane?
a
Nose movement involves angular movement around its CG as well as which axis?
a
In order to raise the nose and lower the tail of the airplane, which direction does the trailing edge of the elevator move in?
a
What are the consequences of loading the airplane incorrectly with:
a. the center of gravity forward of the forward limit?
b. with the center of gravity behind the aft limit?
a
What primary control provides roll?
a
Rolling is angular motion about which axis running through the CG?
a
In which direction does the pilot move the control column to make the right wing raise?
a
True or false? At normal flight speeds, for the right wing to raise, the right aileron will go down and the left aileron will go up.
a
True or false? If differential ailerons are used to counteract the effect of adverse yaw effect, one aileron will raise by an amount the same as the other aileron is lowered.
a
Does the area below the wing have higher static pressure than the area above the wing?
a
Yawing occurs about which axis that passes through the CG?
a
An airplane is banking left for a left turn. What effect will the extra drag on the right aileron have?
a
How can adverse yaw effect be reduced?
a
What primary control provides yaw?
a
Yawing increases the speed of the outer wing. Does this cause its lift to increase? IF so, what does this lead to?
a
Yaw also generates a sideslip. Will the dihedral on the more forward wing cause it to rise?
a
At high airspeeds, are the control surfaces more effective than at low airspeeds?
a
Does slipstream from the propeller over the rudder and elevators increase their effectiveness?
a
What is the purpose of aerodynamic balance?
a
Give three examples of aerodynamic balance.
a
If the stabilator is moved in the preflight external inspection, the anti-balance tab should:
a. move in the same direction.
b. move in the opposite direction.
c. not move.
a
If the elevator is moved in the preflight external inspection, the balance tab should:
a. move in the same direction.
b. move in the opposite direction.
c. not move.
a
What is mass balance used for?
a
