Definitions:
Ailerons – Hinged devices attached to the wing to control rolling moments. As they move downwards, they push the air down which causes the wing to tilt upward.
Flaps – Produces extra lift or drag, attached to the trailing edge of the wing. Stalling speeds are reduced when the flaps are extended down therefore aircraft can travel safely at lower speeds, which is useful for landing and taking off.
Slats – Produces extra lift (usually during takeoff and landing), attached to the leading edge of wing. These extend and make the wing have a larger surface area.
Airbrakes – A surface that is extended into the airflow which reduces speed.
Spoilers – Used like air brakes to reduce any remaining lift and slow down the airplane.
Elevators – Found on the rear of the plane. They can be raised or lowered to change the direction of plane’s nose (pitch). This makes the plane climb or descend. Raising the elevators makes the plane climb.
Rudder – Found on the tail of the plane. Moving it controls the direction of the plane (yaw).
Steady Flow - Steady flow is the term used for conditions (speed, direction, pressure) which may differ from point to point but do not change in time.
Define Uniform Flow - Uniform flow is the term used for flow velocity which has a constant (same) magnitude and direction at every point in the fluid.
Centre of Pressure – The centre of pressure is the location on an aerofoil where the aerodynamic moments are equal to zero.
Camber – The maximum distance of the camber line from the chord line
Streamline – A curve which can find the flow velocity by taking the tangent of the curve at any point.
Dihedral – The upward angle of an aircrafts wing where they meet the fuselage (horizontal plane/wing root). The wing tip must be set above the wing root.
Anhedral – The downward angle of an aircrafts wing where they meet the fuselage. The wing tip must be set below the wing root. (Negative dihedral)
Quasi-steady Flow – In quasi-steady flow the time change is less than ¥ and that any inertia effects can be neglected (due to slow boundary affects)
Wind Tunnels - Wind tunnels work under isothermic conditions (no temp. change), therefore p1v1=p2v2
