Aerospace Module #1A
Terms
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- 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