Four Forces of Flight
What is lift, weight, thrust and drag?
Weight must be equal to what in straight and level flight?
What is lift?
This is the airflow that is parallel and opposite of the flight path of the airfoil.
What is relative wind?
This aircraft system controls "thrust"?
What is a propeller or jet?
These are the two types of drag.
What is parasite and induced drag?
This is the intercept of the chord line of the wing and the relative wind.
What is Angle of Attack?
This is the terms to describe the line or reference plane where all "arm" measurements are taken.
What is "datum?"
This part of the lift equation can be changed by adding flaps?
What is surface area of the airfoil?
Thrust must be equal to what in straight and level flight.
What is drag?
These are the three types of parasite drag?
What is form drag, interference drag, and skin friction?
What is Bernoulli's principle?
The aircraft is more stable when we have a ____ CG.
What is forward CG?
These parts of the lift equation a pilot can control.
What is velocity, CL (AOA), and surface area (aka flaps)?
Torque effect is most pronounced in what conditions?
What is high power and low airspeed?
Total drag is composed of what.
What is parasite and form drag?
Newton's 3rd law related to aerodynamics tells us what.
An aircraft always stalls at the same __________ regardless of airspeed, weight, or any other factor.
What is angle of attack?
If we double the velocity of an aircraft, the lift will _____.
What is increase by a factor of 4?
Vectors have both______ and __________.
What are magnitude and direction?
Induced Drag is a byproduct of what.
What is a byproduct of lift?
Changes in the center of pressure of a wing affect what part of the aircraft.
What is aerodynamic balance and controllability? (A wing's center of pressure moves forward and back with changing angles of attack, forward for high angles and back for lower. This changes the postion of the airloads on the wing and therefore changes the aircraft's aerodynamic balance and controllability.)
Delaying a stall, warning the pilot of a stall, and making the aircraft controllable in a stall.
What are safety measures?
The lift equation contains what variables?
What is velocity squared, coefficient of lift, surface area of the airfoil, and air density?
An advantage of variable-pitch propellers.
What is efficient performance?
Ground Effect is most pronounced approximately how high above the surface.
What is 1/2 wingspan height above the surface?