WP: AOA, Stalls, and Spins

[embedyt] https://www.youtube.com/watch?v=zCDC4NgYyao[/embedyt]

Talk about bernouli


  • Angle of attack is the angle between the chord line and the direction of the relative wind
  • Relative wind is the direction of airflow relative to the wing when the wing is moving through the air
  • The wing chord line is a straight line from the leading edge to the trailing edge
  • THE AOA at which the wing stalls will always stay the same regardless of weight, or speed, or loading, etc
  • This means the airplane can be stalled at any airspeed, and in any flight attitude…to stall the airplane, all you have to do is exceed the critical angle of attack
  • Now, the airplane does generally stall at the same indicated airspeed regardless of temperature or altitude, because the airspeed indicator is also related directly to air density
  • Think pac man, the airspeed indicator measures how many dots pac man is getting, more dots means more lift.
  • Less dense air, low airspeed, and low AOA all mean less lift, high AOA, high airspeed, or high density (low-density altitude) or cold air means more lift
  • Just don’t try to bite off more than you can chew, that’ll break your jaw, aka, stall the airplane

Now when it comes to spins, don’t worry, you can’t spin unless you stall first, an airplane will only spin when one wing is more stalled than the other