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54 Cards in this Set

  • Front
  • Back
What is Aerodynamics?
The study of forces and the resulting motion of objects through air
What are the 4 primary forces of flight?
Lift, weightm thrust, drag
What does aerodynamics allow?
allows heavier then air vehicles to fly.
How do the 4 primary forces counteract?
lift is counteracted by weight, while thrust is counteracted by drag
What is lift?
The force that holds an aircraft in air
Where can lift be generated from?
Anywhere but mostly from the wings.
What does the cross section of a wing show?
that the wing is in the sahpe of an airfoil
How is the structure of the wind determined?
By the mission of the aircraft
Which types of aircraft tend to have larger and thicker wings? Why?
Transports and bombers. They need more lift cuz they are heavier.
How are stability and maneuverability related (wings)?
An increase in one causes a decrease in the other
What is AOA?
Angle of Attack. The measurement of the angle between the wing and the air flowing over it.
If you increase the AOA, will this cause an increase or decrease in lift?
What happens if you have too much AOA? Why?
Stall. Cuz of the separation of airflow over thw wing and the drag created from the underneath portion of the wing
What is the solution to ensure there isn't too much AOA?
Computer controlled AOA limiters
What are the 3 main control axis?
Pitch, roll, yaw
What are the jobs of the stabilizers?
To provide stability for the aircraft and keep it flying straight
What is the vertical stabilizer do?
keeps nose of the plane from swinging to the sides
What does the horizontal stabilizer do?
Prevents up and down nose movement.
What is a canard? What are some examples?
When the horizontal stablilizer is in front of the wings. Eurofighter and Gripen
What is the rudder?
Hinged prat of the vertical stabilizer. used to deflect the tail to the left and right giving the yaw input.
How do you get the yaw input?
The rudder
How do you get the pitch input?
The elevator
What is the elevator?
Hinged part of horizontal stabilizer. Used to deflect the tail up and down giving it the pitch input.
What is the aileron?
Outboard hinged part of the wing. used to roll wings from side to side. Gives the roll input
How do you get rolll input?
The Aileron
What are flaps?
Used during takeoff and landing to increase the amount of lift produced by the wing
What are slats?
Help provide more lift by changing the shape of the airfoil
What are spoilers?
used to deflect air to produce drag and limit lift. Used during landing.
What is drag?
resistance of air to the airframe
How is a shockwave created?
When the plane gets closer to supersonic flight, the air is pushed out of the way more forcefully and compact.
What are the 3 types of drag?
Shock wave drag, parasite drag, induced drag
What is shock wave drag?
the drag created by the shock wave
What is parasite drag?
Created by airflow over a rough surface and can be caused by poor machining, poor airframe design, an dadded equipment
What is induced drag?
caused by the production of lift. Slows an aircraft by creating a drag vector that is associated with the lift vector.
What type of engines power most military and passenger aircraft?
Jet engine AKA Gas turbine engines
What is the simplest type of engine? What generation aircraft can they be found
Turbo jet. Can be found on 1st and 2nd generation aircraft
What are the 6 major compnents of the Turbo jet?
INlet, compressor, burner, turbine, shaft, amd nozzle
How does a jet engine work?
Suck, Squeeze, bang, blow
What is thrust?
the force produced by te aircraft engine and is measured in pounds of thrust
What is the T/WT
Thrust to wieight ratio- the amount of thrust the aircraft angine can produce divided by the clean gross wieght of the aircraft
What happens to the T/WT ratio when the fighter gains altitude? Why?
It decreases. Less thrust produced in oxygen depleted environment
What are the 2 primary types of jet engine thrust?
Axial thrust and vectored thrust
What is axial thrust?
When the engine exhaust is directed out of the engine parallel to the engine.
What is vectored thrust?
the exhaust is directed either on a 2-D or 3-D plane.
What are the advantages to vectored thrust?
Allows for higher AOA at slower speeds, allows a much tighter turn rate capability
What are the 3 factors of combat gross weight?
weight of the airframe, weight of the fuel, the weight of the ordnance it's carrying
What is the comabt gross weight also known as?
safe, theoretical max wieight
What happens if the plane is near the combat gross weight at take off?
A minimal amount of fuel is removed and they are refueld immediately after take off
What is the wing loading factor?
Combat gross weight/surface area of the wing.
What is the turn rate?
How fast the aircraft turns
What is the ICV?
Instantaneous corner velocity- the velocity at whcih an aircraft gets the highest turn rate with the smallest turn radius. Also the lowest speed at which the aircraft can reach it's max G.
What is the ITR?
Instantaneous turn rate- the measure of rate of turn at the ICV point
What is the SCV?
Sustained corner velocity- the speed an aircraft can get a high performance turn and can sustain the turn without losing speed or altitude
What are EM diagrams used for?
A graphic depiction of an aircraft's performance capability. Compare strenghts and weaknesses.