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36 Cards in this Set

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  • Back
Forces in motion are said to be ____________.
Dynamic
An ______ is any machine that is capable of flying through the air.
Aircraft
Name the two natural forces acting upon and airplane in flight: _____ and______.
Gravity and drag
If a control surface, such as a vertical or horizontal stabilizer, does not move or provide lift, can it still be considered an airfoil?_______.
Yes
Air is made up of several gases. Which one of these gases makes up the greatest percentage in the atmosphere? ____
Nitrogen
A hot air balloon has no horizontal control, pilots achieve some directional changes by seeking changes in______ _____at various altitudes.
wind direction
A balloon operates on the principle of _________.
buoyancy
The main body of a hot air balloon?
envelope
A lightweight, low carbon fuel used in hot air balloon burners
propane
The heat source for filling an envelope with hot air is known as the ____________.
burner
What is the great force that drives the motion of our atmosphere?
Sun
A column of air that moves vertically is known as _______.
thermal
The distance a glider will travel forward in relationship to the loss of altitude is_____________.
glide ratio
The ratio between the span of a wing and its chord is called?
aspect
Fluid motion due to regions of unequal heating is called?
convection
The wing of a propeller is called the ________.
blade
The tip of a propeller achieves most of its lift because of greater ____________.
speed
A propeller is actually a wing lifting ______.
forward
If an elevator and stabilizer are combined to make one control surface that acts by changing angle of attack, it is called a ___________.
stabilator
The _____causes the aircraft to yaw about its vertical axis.
rudder
The ailerons cause the aircraft to ____about its longitudinal axis.
roll
The elevator causes the nose to _____ up and down.
pitch
The point where all three axes come together is called the _______
center of gravity
What axis passes through an airplane from wingtip to wingtip?
lateral
What axis passes through an airplane from top to bottom?
vertical
What axis passes through an airplane from nose to tail?
longitudinal
The point at which a wing will stall?
critical angle of attack
What are the four ways of increasing lift in an airfoil?
increase speed, increase camber, increase area, increase angle of attack
Name the two artificial forces acting upon an airplane in flight.
Thrust and lift
A curvature on the top of a wing, is called the __________.
Camber
As air passes under a wing, a certain amount of lift is generated. This is an example of______Law.
Newton's
A bird has two control surfaces for maneuvering. What are they?
Tail feathers and wing feathers
As a fluid, like air, is accelerated, the ______drops. This is an example of ___________Law.
Pressure, Bernoulli's
The line between the leading and trailing edges of a wing. What is it called?
Chord
The curvature, or camber, on the upper surface of a bird's wing, is an example of what kind of lift?
Bernoulli
The _______is an imaginary line, in an airfoil, that connects the leading and trailing edges.
Chord