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AT 116 EXAM 2 STUDY GUIDE
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AT 116 EXAM 2 STUDY GUIDE2024-2025
Why would we want anhedral on a wing? - ANSWER The a/c has a very heavy
and low center of gravity
Which of the following is NOT one of the ways an airplane gains stability
around vertical axis? - ANSWER Move CG behind center of lift
How do we create yaw stability on an a/c? - ANSWER Only a & b are correct
Put a vertical stabilizer on tail of a/c
Sweep wings back
What produces pitch stability on a standard a/c? - ANSWER Both b & c are
correct
Horizontal stabilizer pulls downward
Horizontal stabilizer constantly changes AOA w/ pitch to dampen pitching
motion
T/F: Pitch Stability is considered to be longitudinal stability - ANSWER True
T/F: Wing dihedral is one of the ways we achieve stability around longitudinal
axis - ANSWER True
T/F: Wing dihedral must be greater on high wing a/c than on a low wing a/c -
ANSWER False
How does dihedral make an a/c stable? - ANSWER The wing that falls, results
in a Bernoulli force that directly opposes gravity, and lifts the wing back up
T/F: High wing a/c have natural stability because the CG is below lift -
ANSWER True
, Which of the following is NOT one of the ways that swept back wings provide
yaw stability for an a/c that inadvertently yaws to the right? - ANSWER The
wing left wing tip produces more induced drag and that pulls the a/c back left
Which of the following is NOT an advantage of a high wing a/c? - ANSWER
Easier to build strong landing gear support
Which of the following is NOT an advantage of a low wing a/c? - ANSWER
Better lift/drag ratio
What causes ground effect in a fixed wing a/c? - ANSWER Air gets trapped
under the wing and artificially raises the pressure under the wing
Which of the following is true of a SPIN? - ANSWER All answers are correct
What is the advantage of a Vee Tail? - ANSWER It reduces drag
Why is a Tee Tail considered to be better at high angles of attack? - ANSWER
The horizontal stabilizer does not block the flow of air over the rudder.
Why is a Tee Tail considered undesirable? - ANSWER The vertical stabilizer
must be thicker and heavier to support the horizontal stabilizer
If you wish to yaw a vee tail a/c to the left, what is the correct position of the
flight controls on the tail? - ANSWER Right ruddervator up, left ruddervator
down (Whichever yaw direction is, that ruddervator is down)
Which of the following describes a "flat spin?" - ANSWER A spin where the
nose stays at the horizon during the spin and never becomes nose low.
T/F: Ground Effect raises the air pressure under the wing - ANSWER True
T/F: Vee tails can be used to reduce the reflective radar signature on an a/c? -
ANSWER True
Why do most modern fighter jets have two vertically mounted tails? -
ANSWER To have enough survive area to compensate for the loss of thrust on
one engine if one engine fails
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