Page 68 - Aeronautical Engineer Data Book

Symbols and notations 55
Table 3.4 Continued

Subscripts
0 Datum axes. Normal earth-fixed axes.
Straight/level flight. Free stream flow conditions.
Sea level.
1/4 Quarter chord.
2 Double or twice.
∞ Infinity condition.
a Aerodynamic. Available.
b Aeroplane body axes. Bandwidth.
c Chord. Compressible flow. Camber line.
D Drag.
e Equilibrium.
E Earth axes.
F Fin.
g Gravitational. Ground.
h Horizontal.
H Elevator hinge moment.
i Incompressible. Ideal.
l Rolling moment.
LE Leading edge.
L Lift.
m Pitching moment. Manoeuvre.
n Damped natural frequency.
n Neutral point. Yawing moment.
p Power. Phugoid.
p Roll rate.
q Pitch rate.
r Roll mode.
r Yaw rate.
s Short period pitching oscillation. Spiral.
Stagnation. Surface.
t Tangential.
TE Trailing edge.
T Tailplane.
u Axial velocity.
U Upper.
v Lateral velocity.
V Vertical.
w Wing.
w Normal velocity.
x ox axis.
y oy axis.
z oz axis.
Angle of attack or incidence.

Throttle lever.
Rudder.
Elevator.
Pitch.
Ailerons.
Thrust.