The Basics Flashcards
What’s the unit for mass?
Kg
What’s the unit for Force?
Newton (N) force that accelerates 1Kg at 1m/sec^2
What’s the unit for Time?
Seconds
What’s the unit for Distance?
Metres
What’s the unit for Area?
Metre squared m^2
What’s the unit for Velocity?
m/sec
What’s the unit for acceleration?
m/sec^2
What’s the unit for Temperature?
Kelvin (K)
What’s the unit for pressure?
Pascal (Pa): a pressure of 1 N/m^2
What’s the unit for density?
Kilograms per cubic metre Kg/m^3
What’s the unit for Energy?
Joule = 1 N moving 1 metre
What’s the unit for power?
Watt (w): a rate of energy use of 1J/sec
How much is an hectopascal?
100 pascals = 1mb
How much is 1 Kg weight into N?
9.81 N
What’s Newton’s First Law?
A body will continue in a state of rest or uniform motion unless acted on by an external force
What’s Newton’s Second Law?
the rate of change of momentum of a body is proportional to the applied force, and takes place in the direction in which the force acts
What’s Newton’s Third Law?
to every action there is an equal and opposite reaction
What are the gas laws?
1st: Boyle’s law: at a fixed temperature, increasing pressure will decrease the volume and thus increase the density
2nd: Charle’s law: at a fixed pressure, increasing the temperature will increase the volume and thus decrease the density
3rd: Pressure law: at a fixed volume, increasing temperature or pressure will increase the other factor.
What’s the formula when we combine these ideal gas laws together?
Density=P/RT
What’s an adverse pressure gradient?
An area where the airflow is moving from low to high pressure
What’s the anhedral?
The DOWNWARD angling of the wing, root to tip
What’s the boundary layer?
A layer of air next to the aircraft skin slower than the free stream air
What’s the camber?
The shaping of the airfoil to improve lift coefficient
What’s the chord line?
The line joining the front of the airfoil to the back
