Quantcast Factors Affecting T-45 Stability

 

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Stability
T-45A/C TS, E2C2, ADV & IUT Aero-04
C.
Directional Divergence
Sg 3, fr 3
Directional Divergence
1.
Results from negative directional stability
2.
T-45 and other aircraft do not exhibit this condition
IV. Factors Affecting T-45 Stability
A.
Coupling
1.
Interaction of simultaneous roll and yaw movements
Overlay 1
2.
T-45 may exhibit the following tendencies:
Overlay 2
a.
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
Page 4-15


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