Ailerons
Control surfaces attached to the wing to control roll.
Roll
Aircraft rotation about the body-fixed xb axis.
Yaw
Aircraft
... [Show More] rotation about the body-fixed zb axis.
Positive pitch rate
The rate which will increase the angle of attack.
Pitch
Aircraft rotation about the body-fixed yb axis.
Trajectory analysis
The use of formulas & algorithms to represent and analyze the aircraft during take-off, climb, cruise, descent, and landing.
Elevator
The controlling surface attached to the horizontal stabilizer at the tail of an airplane that regulates an aircraft's pitch.
Concentrated force
The single net force acting at a point on a body, which will have the equal effect of all the distributed forces acting on the body.
Compressor
A mechanical device that has small blades fixed to a spindle, rotating at high speed to increase the pressure of the air flowing through it.
Engine Cycle
A sequence of assumptions describing how the flow behaves as it passes through the various parts of the engine.
Nacelle
An enclosure in which a jet engine is housed, attached to the body or wings of an airplane.
Static stability
When force or moment disturbances oppose each other so that they are eliminated/reduced.
Flat Earth model
The assumption that the Earth is flat with a uniform and parallel gravitational field.
Inertial reference frame
A coordinate system whose origin is fixed to the surface of the earth at mean sea level. Such that: xz = vertical plane; xy = horizontal plane.
Wind-axis system
A coordinate system whose origin is fixed to the center of gravity of the aircraft and whose x-axis is along the airplane velocity vector.
Airplane velocity
The relative velocity of the airplane with respect to the atmosphere, which is assumed to be non-rotating. If there is no wind, then it is the inertial velocity.
Angle of attack
The angle (α) between the body x-axis and the wind x-axis (between body axis and velocity)
Kinematic equations
Equations which arise from the definition of velocity. They relate the position of the cg to velocity components.
Flight path angle
the angle (γ) between the wind x axis and the local horizon x axis.
Mathematical degree of freedom
The difference between the number of variables and the number of equations. (mdof = #var - #eqn)
Specific fuel consumption
The ratio of the weight flow rate of fuel to the thrust. E.g., the weight of the fuel consumed to produce one lb of thrust.
Vertical plane
the x-z plane of the local horizon (and the inertial) axes system. Also, the plane in which 3-DOF flight is assumed to take place.
Taper ratio (eqn)
The non-dimensional quantity of a wing, λ=ct/cr, where ct = chord length at tip of wing & cr = chord length at root of wing. [Show Less]