POF Day 1 Flashcards
What equation is to find weight?
MassXgravity
How do you convert knots to m/s
Multiply by 0.5144
What is the momentum equation
Momentum =massXspeed
How do you find a minute?
Minute=forceXdistance
How do find force
Force= massXgravity
What is laminar air flow?
Smooth air flow
What is the sea level pressure?
1013hpa
What is the density formula?
Density=mass/volume
What happens to the density of you increase the pressure?
Increase
What happens to density if you increase the temperature?
Decrease
What happens to the density if you increase the humidity?
Decrease
What is pressure and volume proportional to?
Temperature
Every 1000 foot what does the temperature go down by?
2
What is static pressure?
Weight after air molecules create a force per unit in all directions
What is dynamic pressure
The pressure of the air exerted on a body due to motion
What is the dynamic pressure equation
Dynamic pressure=1/2XdensityXspeed^2
What does a plane use to take in dynamic pressure
Pitot tubes
What does a static port do?
Takes in the static pressure exerted on the plane to calculate the total dynamic pressure for the air speed indicator
What is indicated air speed (IAS)
The speed shown on the ASI but can have mechanical problems like instrument and positioning
What is calculated air speed (cas)
The same as isa but run through a computer to remove the mechanical problems
What is equivalent air speed (esa)
Only used when going slower 0.3 Mach as the air is incompressible
What is the true air speed (tas)
Speed reliable to the air it is flying
What anagram helps for remembering air speed
ICET is pretty cool drink
What is dynamic pressure proportional too
Speed^2
How do you calculate ground speed
Ground speed=true air speed+tail wind-head wind
What is turbulant air flow
Blocked air flow that is unsmooth
What is the point where the air flow gets stopped at the front
Stagnation point
When a air flow gets close what happens to the pressure
The dynamic pressure goes up and the static goes down
What happens to pressure when an air flow opens back up
Dynamic pressure goes down and static goes up
What is bernoullis therom
In a flow of ideal fluid, the sum of static pressure and kenetic energy per unit volume (dynamic pressure) remains constant
Where is the area of high static pressure on an object
At the front where the airflow meets it
What is an aerofoil
A cross section of a wing
What is the front and back of an aerofoil
Leading edge, trailing edge
What is the line from the front of an aerofoil to the back called
The chord line
What is a camber
A camber is a angled aerofoil to gain lift
How does lift and drag work together
Lift goes directly up and the drag pulls it back to create total reaction
What happens to the centre of pressure in a symmetrical aerofoil
It doesn’t move
What is the lift equation
Lift=1/2XdensityXspeedXsurface areaX coefficient of lift
