Factors Affecting T-45 Stability

Stability

T-45A/C TS, E2C2, ADV & IUT Aero-04

Directional Divergence

Sg 3, fr 3

Directional Divergence

(2 overlays)

Results from negative directional stability

T-45 and other aircraft do not exhibit this condition

IV. Factors Affecting T-45 Stability

Coupling

Interaction of simultaneous roll and yaw movements

Overlay 1

T-45 may exhibit the following tendencies:

Overlay 2

Dutch Roll

Sg 4, fr 2

Lesson Organization

(1) Lateral stability stronger than directional

stability

STABILITY

(2) Induced drag increases on wing into wind

* T-45 Flight Controls

* Stability (Generic)

when aircraft yaws

* T-45 Stability (General)

* Factors Affecting

T-45 Stability

(3) Weak directional stability allows adverse

yaw, that causes roll and yaw in opposite

Sg 4, fr 3

direction

Coupling

(4) Increase lateral stability at high AOA may

produce Dutch roll tendency

(5) T-45 has dutch rolling tendency at slow

speeds

(a) Countered by yaw damper system

(b) With yaw dampener/SBI inoperative,

Sg 4, fr 5

quite noticeable but controllable,

Dutch Roll

resulting in an increased pilot workload

(9-99) Original

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