1 - King - Aerodynamic Principles Flashcards
<p>Forces on an Aircraft</p>
<p>Thrust, Drag, Lift and Weight</p>
<p>Unaccelerated flight definition</p>
<p>No change in speed or direction</p>
<p>Straight and Level Flight</p>
<p>Thrust = drag Lift = Weight</p>
<p>Bernoilli Law</p>
<p>Air traveling faster over the curved upper surface of causes lower pressure on the top surface.
Top of wing - Lower pressure
Below the wing - Relatively high pressure</p>
<p>Cord line</p>
<p>The center line between front of wing and trailing edge of wing.</p>
Relative Wind
Wind direction against the wing
Acute Angle or Angle of Attack
Angle between Chord line and Relative Wind
Critical Angle of Attack
above a wing’s critical angle of attack, the flow of air separates from the upper wing surface and backfills, burbles and eddies, which reduces lift and increases drag. This condition is a stall
What condition must exist to spin an Airplane
It must be stalled.
In a stall are both wings stalled or just one?
Both are stalled, but one wing is stalled more then the other.
Does frost need to be removed?
Yes, frost Disrupts the smooth airflow over wind and decreases its lifting capability.
Frost on wings
May prevent the airplane from becoming airborne at normal takeoff speed.
What makes an airplane turn?
Horizontal component of lift caused by alerions
What is adverse yaw?
Caused by extend the alerions, one wing increases drag and decrease lift and moves back, while the other wing has the opposite effect.
What forces makes an airplane turn?
The horizonal component of lift, caused by the alerions.
The amount of excess load that can be imposed on the wing of an airplane depends upon the?
Speed of the airplane
What basic flight maneuver increases the load factor on a airplane as compared to straight and level flight?
Turns
During in approach to a stall in increase load vector will cause the airplane to?
Stall at a higher speed
In what flight condition is torque affect the greatest in a single engine airplane?
Low speed, high power, high angle of attack
The left turning tendency of an airplane caused by P factor is the result of the
Propeller blade descending on the right produces more thrust than the ascending blade on the left
When does P factor cause the airplane to ya to the left
when at high angle of attack
The angle of attack for a propeller is defined as
the angle of between the propeller cord line in the relative wind
