Flight
Airplane Parts
Science Stuff
Hot Air Balloons
More Science
100
All the lines of axes of an airplane pass through the exact center of the plane. This point is called the __?
Center of gravity
100
What control surface creates/affects the yaw motion of an airplane?
rudder
100
Which of Newton's laws states that an object at rest will remain at rest unless acted upon by an unbalanced, outside force?
1st, 2nd, or 3rd
1st law
100
How long did the first successful hot air balloon flight last?
25 minutes
100
The natural force that pulls everything toward the center of the earth is called
__________.
Gravity
200
What opposes thrust?
Drag
200
The curved part of an airfoil that goes from the leading to the trailing edge is called a (an) __________
camber
200
The amount of heat required to raise the temperature of one pound of water one degree Fahrenheit is called a _____________.
BTU (British Thermal Unit)
200
What type of fabric, used in hot air balloons, will withstand high temperatures?
Dacron
200
What does UAV stand for?
Unmanned Aerial Vehicles
300
The imaginary line that goes from wingtip to wingtip and passes through the center of the airplane is called the _______________________.
Lateral axis
300
What is attached to the horizontal stabilizer and moves up and down?
Elevator
300
What provides energy that causes our atmosphere to move both horizontally and vertically?
the Sun
300
A hot air balloon operates on which of the following principles?
bouyancy
300
What two things happen to air when it is heated?
Air expands and the pressure drops
400
How does an increase in the angle of attack (that would not result in a stall) affect lift?
An increase in angle of attack increases lift.
400
A line drawn through an airfoil from its leading to trailing edge is called _______________
chord
400
In this venturi tub, what does the top gauge measure?
Velosity
400
A hot air balloon envelope with a burner, basket, and four gas tanks will weigh about ______ pounds.
300 600 900 1200
600
400
How much is the standard temperature drop with an increase in altitude?
________ degree for every ________ feet
3 1/2 degrees for every 1,000 feet
500
What refers to the nose right, nose left motion of an aircraft (movement around the vertical axis)?
Yaw
500
_____________ are control surfaces at the end of airplane wings.
Ailerons
500
When a fluid, like air, is accelerated, what happens to the pressure?
Increases
Decreases
Stays the Same
Pressure decreases
500
The air traveling over the upper surface of the wing goes much faster and much farther than the underside airflow, which creates __________.
downwash
500
What term is defined as fluid motion between regions of unequal heating (in other words: warm air is rising and cooler air is sinking resulting in circulation)?
convection