Flight Dynamics Chpt 9

Front 1

longitudinal motion

Back 1

pitching motion

Front 2

lateral-directional motion

Back 2

combined rolling and yawing motion

Front 3

trim conditions

Back 3

for quasi-steady flight, the angle of attack and the elevator angle required to maintain a given flight condition

Front 4

statically stable

Back 4

an airplane is said to be statically stable if it automatically produces forces and moments which tend to reduce a disturbance

Front 5

statically unstable

Back 5

an airplane is said to be statically unstable if it produces forces and moments which tend to increase a disturbance

Front 6

statically neutrally stable

Back 6

an airplane is said to be statically neutrally stable if it automatically produces forces and moments which do not change a disturbance

Front 7

neutral point

Back 7

the center of gravity position where the pitching moment is independent of the angle of attack. another name for the airplane aerodynamic center. when the cg is at this point the airplane is neutrally stable

Front 8

static margin

Back 8

the distance that the cg is ahead of the neutral point

Front 9

elevator hinge moment

Back 9

the pressure distribution on a deflected elevator produces a moment about the elevator hinge line

Front 10

handling qualities

Back 10

a term relating to the stick force characteristics of an airplane

Front 11

stick force gradient

Back 11

the slope of the stick force versus velocity curve

Front 12

stick-free neutral point

Back 12

if the airplane is trimmed at some velocity and if the pilot lets go of the stick, the neutral point moves forward to the stick-free neutral point

Front 13

stick-fixed neutral point

Back 13

another name for the neutral point

Front 14

trim tab

Back 14

a small control flap at the trailing edge of a control surface which when deflected causes the control surface to float at a given angle

Front 15

elevator angle per g

Back 15

the slope of the elevator-load factor curve. maneuver point: the cg position where the elevator angle required to make an n-g pull-up goes to zero

Front 16

stick-free maneuver point

Back 16

the cg position where the stick force required to make an n-g pull-up goes to zero