Aerodynamic Forces Flashcards
What is Bernoulli’s principle?
Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface.
What forces make an airplane turn?
The horizontal component of lift.
Changes in the center of pressure of a wing affect the aircraft’s?
aerodynamic balance and controllability
When an aircraft is in straight-and-level flight ______ equals _______ and _______ equals ______ drag.
Lift equals weight and thrust equals drag
The left turning tendency of an airplane caused by P-Factor is the result of the
Propeller blade descending on the right, producing more thrust than the ascending blade on the left.
When is torque effect the greatest in a single-engine aircraft?
At low airspeed, high power, and high angle of attack
When does the P-Factor cause the airplane to yaw to the left?
When at high angles of attack
What determines the amount of excess load that can be imposed on the wing of an airplane?
The speed of that airplane
(At slow speeds, the maximum available lifting force of the wing is decreased. The wing will stall at lower excess loads and relieve the load)
Define “Angle of Attack”
The angle between the chord line of an airfoil and the relative wind
The “angle of attack” could also be defined as the angle
between the wing chord line and the relative wind
At what point are the four forces of flight at equilibrium?
during unaccelerated flight
The four forces of flight?
Lift, weight, thrust, drag
What basic flight maneuver increases the load factor on an airplane as compared to straight-and-level flight?
Turns
How do turns act upon an aircraft compared to flying straight-and-level flight?
Turns increases the load factor on an airplane
