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AT 116 EXAM STUDY SET
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AT 116 EXAM STUDY SETLoad Factor - ANSWER ratio of the total load supported by the wing compared
to the weight of the aircraft. Also commonly known as "G force".
Load Factor Equation - ANSWER load supported by wing/total weight of
aircraft
Positive Static Stability - ANSWER initial tendency to return to the position
from which it was displaced
Neutral Static Stability - ANSWER The initial tendency of the aircraft to remain
in a new condition after its equilibrium has been disturbed
Negative static stability - ANSWER The initial tendency to continue moving
away from equilibrium following a disturbance.
Roll Stability - ANSWER Stability around the longitudinal axis = lateral
stability
yaw stability - ANSWER Stability around the vertical axis = directional
stability
Pitch Stability - ANSWER Stability around the lateral axis = Longitudinal
Stability
Benefits of high wing - ANSWER Better lift/drag ratio
Better lateral (roll) stability
Shorter landing distance
benefits of low wing - ANSWER Easier to build strong landing gear support
Better roll maneuverability (less lateral stability)
Shorter take off distance
Ground Effect - ANSWER Air gets trapped under wing causing high static
pressure and more lift close to ground, good for take off bad for landing
, Is high or low wing more stable and why? - ANSWER high wing, lift is above
CG
benefits of T tail - ANSWER Keeps air flowing near rudder at high AOA and
air flowing over elevators at low AOA. Also gets horizontal stab out of the way
of engines and makes planes seem bigger
drawbacks of T tail - ANSWER more weight on top, more structure needed
Benefits of v tail - ANSWER decreases interference drag, pressure drag and
skin friction drag and even reduces radar detection
benefits of biplane - ANSWER short wings good for fast rolls
Flying wires - ANSWER transmit lift back to fuselage
landing wires - ANSWER transmit downward impact of landing from wings to
fuselage
Interplane struts - ANSWER transmit lift between top and bottom wing
cabane struts - ANSWER transmit lift from wing roots to fuselage, also support
wings when they don't connect to fuselage
stagger - ANSWER when wings are not directly above each other
negative stagger - ANSWER top wing behind bottom wing
positive stagger - ANSWER bottom wing behind top wing
stagger wires - ANSWER X wires to brace and keep stagger position
Interplane interference - ANSWER airflow from both wings interfering with
each other
gap ratio - ANSWER gap/chord
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