Air And Aerodynamics Flashcards
Elevators
On horizontal stabilizer and control pitch
Pitch
Up and down movements
Rudder
On the vertical stabilizer and control the yaw
Yaw
Left and right movement
Ailerons
On wing, control roll/bank
When the left aileron is up, which way does the plane go?
Banks left
When the left aileron is down which way does the plane go
Banks right
What does PEBARY stand for?
Pitch, elevator, bank, aileron, rudder, yaw (left/right)
Elevators up make the plane go
Up
Elevators down make the plane go
Down
Rudder left makes the plane go
Left
Rudder right
Plane right
Aileron up
Wing goes down
Aileron down
Wing goes up
Cabin
Where all the people or goods sit
Cockpit
Where the pilots control the plane
Fuselage
The main body of the plane
Propellor
On wings, move the plane forward, give the plane speed
Wing
Has ailerons and propellers
Weight
The force of gravity. It acts in a downward direction towards the centre of the earth
Lift
The force that acts at a right angle to the direction of motion through the air (upward)
What produces lift?
The shape of the wing
Thrust
The force that propels the plane in the direction of movement, which is forward
Drag
The force that acts opposite to the direction you want to go ( pushes plane backwards)
what types of trace gasses make up air
carbon dioxide, water vapour, neon,helium, krypton, hydrogen, methane,xenon
what does trace amounts mean
small amounts of something
what is air pressure
amounts of air placed in or around an object
air resistance
amount of air that pushes against something
air flow
the direction in which air moves past an object
expand
takes up more space
compression
air pressed into a smaller space
accelleration
when something speeds up
decelerate
when something slows down
aerodynamics
the study of air and how it moves around objects
bernoullis principle
moving air has less pressure than still air
law of flight
objects go from high pressure to low pressure
newtons third law
if there is a force one direction there is an equal force in the opposite direction
glider
a plane that does not have an engine but relies in thermals which are upward air currents that provide lift
air foil
the shape of an airplane or a birds wing that is curved on the top and flat from the bottom
why are birds light weight but strong?
because they have hollow bones
what are three characteristics that birds and insects share
they have wings that are shaped as a air foil, they have strong pectoral muscles that help them move there wings, they both have aerodynamic shape
what is the roll of primary feathers in birds
the primary feathers allow them to move around the air
what do secondary feathers do
they catch air
what does stream line mean
when a object is shaped so that air can move smoothly across its surface
what is more stream lined a square or triangle
a triangle
how do we know that air exists
- takes up space
- has weight
- has volume
- has pressure
what has higher pressure cold air or hot air
cold air
what has lower air pressure still or moving air
moving air
why does a crumpled ball of paper fall faster that a flat piece of paper
because a crumbled ball of paper doesn’t have as much surface area
what is the purpose of hollow bones in birds
to have light weight but strong wings
hot air balloons use hot air because…
because hot air expands and rises
what are the main components of air?
nitrogen, oxygen, argon, trace amounts
