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|  T-45A/C TS, E2-C2, ADV & IUT Aero-03
Slow-Speed Flight, Stall and Spin, and AOA System
PRESENTATION
I.
Slow-speed flight 1.7.1.4.1
Sg 1, fr 2
Lesson Organization
A. Planform of T-45 aircraft
SLOW-SPEED FLIGHT,
1.
Two-place, lightweight aircraft with tapered (in both
STALL AND SPIN,
AND AOA SYSTEM
chord and airfoil section), swept wing
* Slow-speed flight
* Stall and spin
2.
Advantages:
* Angle of attack
(AOA) system
a.
Increase in aspect ratio compared to a
rectangular, swept wing design, resulting in
reduction of induced drag
b.
Lift load decreases toward the tips, reducing
need for structure
c.
Structural efficiency is increased while
maintaining a constant thickness ratio
3.
Disadvantages:
a.
Tip stall tendencies
b.
Loss of ailerons at stall
c.
Negative longitudinal stability at high angles of
attack
B.
Wing design
1.
Swept wings normally exhibit tip stall tendencies
Sg 1, fr 4
Leading Edge
because of the lower energy level of the boundary
Vortexing
level at the tip
a.
Lower energy level due to shorter tip chord
compared to root chord
b.
Flow separation at tip aggravated by spanwise
flow due to wing sweep; further aggravated by
leading-edge vortexing
(9-99) Original
Page 3-3
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