# Shared Flashcard Set

Aerodynamics
Aerodynamics
7
Aviation
Not Applicable
06/21/2019

## Additional Aviation Flashcards

Term
 As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will..
Definition
 Remain the same regardless of altitude.
Term
 Dangerous airflow disturbances generated by airplanes – Two names for it. Four main factors. Direction of spin?
Definition
 Wingtip vortex / Wake turbulenceHeavy, Clean, Slow, Quartering tailwind on the runwayClockwise from LEFT wingtip, and Counterclockwise from RIGHT wingtip
Term
 P-Factor – Two things, including the reason for it.
Definition
 One of 4 reasons for left-turning tendency on takeoff.Since most western aircraft have engines that rotate clockwise when viewed from the cockpit, at higher angles of attack the downward moving propeller blade takes a bigger "bite" of air than the upward moving blade. That is, the downward moving propeller blades is at a much higher angle-of-attack than the upward sweeping blade. And with a higher AOA, the downward sweeping blade creates much more thrust (or lift), making the airplane tend to yaw to the left.
Term
 Relative placement of the center of lift / center of gravity
Definition
 As long as you are within the aircraft's CG limits, the center of lift is always aft of the CG.
Term
 Maneuvering speed –   AKA   Definition (in two sentences)   How does it change with weight…
Definition
 Va   The maximum speed at which you can safely stall an airplane. At any speed above Va, the plane breaks before it stalls.   Change w/ weight: Va is based on MAX gross weight, and as the weight decreases, so does the Va (counter-intuitively)
Term
 A forward CG –   Overview of effects on... Stability Stall speed Stall recovery Performance.    Reasons?
Definition
 A forward CG – Better stability Higher (worse) stall speed Better stall recovery Worse performance   Forward CG requires greater tail down force, which in turn requires… Greater (wing) lift, which in turn requires… Greater angle of attack (closer to the critical angle of attack), which results in… Higher (worse) stall speed, AND…. Increased induced drag, which results in… Decreased performance
Term
 An aft CG -   Overview of effects on... Stability Stall speed Stall recovery Performance.    Reasons?
Definition
 An aft CG - Reduced stability Lower (better) stall speed Worse stall recovery Better performance   Requires less tail down force, which in turn requires… Less (wing) lift, which in turn requires… Lesser angle of attack, which results in… Lower (improved) stall speed, AND... Less induced drag, which results in… Increased performance
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