Chapter 7: Basic Aeronautics And Aerodynamics Flashcards
The science and art of flight through the atmosphere
Aeronautics
The science relating to the energy of gases in motion
Aerodynamics
What decreases with an increase in altitude?
Pressure
Measure of how much energy the gas has
Temperature
The measure of how many molecules are squeezed into a defined space
Density
Resistance to the flow of a liquid or gas
Viscosity
The smooth or rough flow of air over an object
Laminar or turbulent flow
The ratio of the speed of an object to the speed of sound in air
Mach number
The part of the airfoil that meets the air first
The leading edge
The area determining the airfoil thickness and thus its lift
Camber (curvature)
The rear junction where the upper and lower parts of the airfoil meet
Trailing edge
The imaginary part of the airfoil that is the starting point for designing an airfoil in cross-section
Chord (chord line)
Ideally, when a plane is in smooth flight, the force of the total lift = the force of the total ___ and the force of ___ equals the force of drag.
Weight, thrust
Lift and weight are in opposition to each other.
Induced lift can be increased by changing the ___ of the ___.
Camber, airfoil
Occurs when lift is destroyed and the force of weight takes over
A stall
The sudden displacement of air and the resulting wedged-shaped wave
Shock wave
The total weight limitation of an airplane
Maximum gross weight
If a pilot subtracts the empty weight from the maximum gross weight, the result is how many pounds can be loaded into the airplane, called
Useful load
Mach is the ratio of the speed of an object to the speed of sound in the air
TRUE
All fluids possess viscosity, which is the resistance to flow, but air is not included here
FALSE
Slowing the flow rate is known as
Viscous drag
On an in-flight aircraft, laminar and turbulent airflow are found in the same locations
FALSE
The angle formed by the airfoil chord and the relative wind direction
The angle of attack
Induced lift is caused by the angle of attack
FALSE
(by changing the camber/curvature of the airfoil shape of the wing; & changing the angle of attack causes both induced and dynamic lift)
Dynamic lift is caused by the camber.
FALSE
(Changing the angle of attack gains both induced and dynamic lift)
Positive atmospheric pressure at the bottom of the wing only increases the induced lift
TRUE
Generally, the less dense the air, the less lift is available
TRUE
