Flight Dynamics Chpt 1

Front 1

body axes

Back 1

A coordinate system fixed to the airplane. The origin is
at the center of gravity; the xb axis is in the airplane plane of symmetry
and points out the nose of the airplane; the zb axis is in the plane of
symmetry and points downward; and the yb axis is perpendicular to the
xb and zb axes and points out the right wing.

Front 2

Pitch axis

Back 2

The yb axis.

Front 3

Static stability

Back 3

If an airplane is disturbed from steady flight, static
stability is the tendency of the airplane to automatically generate forces
and moments which reduce the disturbance.

Front 4

Longitudinal stability

Back 4

Stability about the yb axis.

Front 5

Pitch rate

Back 5

The angular velocity about the yb axis.

Front 6

pitch moment

Back 6

the moment about the yb axis

Front 7

turbojet

Back 7

an axial flow engine which contains a diffuser, compressor, combustion chamber, turbine, and nozzle. It produces thrust by increasing the velocity and pressure of the flow through the engine

Front 8

turbofan

Back 8

A turbofan is a turbojet engine which has a fan after the
diffuser. The fan puts additional air around the turbojet

Front 9

6 DOF equations of motion

Back 9

the translational (F = ma) and rotational (M = I*alpha) equations of motion

Front 10

3 DOF equations of motion

Back 10

The translational equations of motion uncoupled from the rotational equations of motion by assuming small angular rates and negligible effect of control surface deflections on aerodynamic forces

Front 11

dynamic stability

Back 11

the stability characteristics of the actual motion of an airplane following a small disturbance

Front 12

trajectory analysis

Back 12

the determination of the cg position of an airplane
with time using the 3 DOF equations of motion

Front 13

stability and control

Back 13

the analysis of the translational motion of the
cg and the rotational motion about the cg using the 6 DOF equations of motion. Questions concerning the response to a disturbance and handling qualities are answered

Front 14

airplane sizing

Back 14

the iterative process of finding the dimensions of an
airplane that has prescribed performance and stability and control characteristics

Front 15

simulation

Back 15

a computer program in which equations of motion are integrated numerically with respect to time