Aerodynamics

Question 1

What is the relationship of lift, drag, thrust and weight when the airplane is in straight-and-level unaccelerated flight?

Answer 1

Lift equals weight, and thrust equals drag

Question 2

Airplanes climb because of

Answer 2

Excess thrust

Question 3

The minimum forward speed of an airplane is called the _______ speed.

Answer 3

stall

Question 3

You can determine the proper climb altitude for your airplane by referring to the

Answer 3

airspeed indicator

Question 3

The chord line is used to represent

Answer 3

The general shape of the wing

Question 3

Relative wind results from the motion of the

Answer 3

airplane through the air

Question 3

relative wind is called relative because it

Answer 3

results from the motion of the airplane

Question 3

Relative wind is ______ and _____ to the airplanes motion

Answer 3

opposite to, equal

Question 4

Relative wind is _____ which way the airplanes nose is pointed

Answer 4

independent of

Question 5

An important principle to understand when dealing with angle of attack is that the nose (therefore the wing) can be pointed on an incline thats _____ the actual climb path

Answer 5

different from

Question 6

Bernoulli figured out that the faster the air flows over a surface, the ________ pressure it exerts on that surface.

Answer 6

less

Question 7

Air flowing faster over a curved surface causes a slight _______ in pressure on that surface

Answer 7

decrease

Question 8

Raising the nose slightly increases the angle of attack which forces the air to undergo an additional________ greater than that which the _________ of the airfoil can produce

Answer 8

curve, engineered shape

Question 9

An increased angle of attack permits the airplane to produce the necessary lift for flight at a ___________ airspeed

Answer 9

slower

Question 10

When the weight of an airplane is increased, the airplane stalls at __________ indicated speed

Answer 10

higher

Question 11

the critical angle of attack at which the wing stalls _______

Answer 11

Never changes, regardless of airplane weight

Question 12

in what flight condition must an aircraft be placed in order to spin

Answer 12

stalled

Question 13

during a spin to the left, which wings is are stalled

Answer 13

both wings are stalled

Question 14

wings are designed to deflect air _________ while offering very little _________ resistance.

Answer 14

vertically, horizontal

Question 15

As airspeed doubles, parasite drag ________

Answer 15

quadruples

Question 16

as the airplane speeds up, induced drag ________ while parasite drag _____

Answer 16

decreases, increases

Question 17

wingtip vortex action increases with an increase in

Answer 17

angle of attack

Question 18

ground effect results from a/an _________ in induced drag

Answer 18

decrease

Question 19

as the airplane becomes airborne and flies out of ground effect, the wings downwash ______

Answer 19

increases

Question 20

Lowering flaps lowers the trailing edge of the wing, ___________ the angle the chord line makes with the relative wind. This increases the wing’s lift

Answer 20

increasing

Question 21

what is one purpose of wing flaps

Answer 21

to enable the pilot to make steeper approaches to a landing without increasing the airspeed

Question 22

what is ground effect

Answer 22

the result of the interference of the surface of the earth with the airflow patterns about an airplane