Aero Chapter 03, High AOA/Stall/Spin
T-45 Aerodynamics Student Workbook
If spin confirmed:
5. Rudder pedal - FULL OPPOSITE TURN NEEDLE
(opposite spin direction)
6. Lateral Stick -
INVERTED SPIN:
FULL OPPOSITE TURN NEEDLE
(opposite spin direction)
UPRIGHT SPIN:
FULL WITH TURN NEEDLE
(with spin direction)
7. Longitudinal stick - NEUTRALIZE
If recovery indicated or
Airspeed increasing through 160 kts:
8. Lateral stick - NEUTRALIZE
When recovery indicated:
Rudder - SLOWLY RELEASE PEDAL FORCE
Releasing the pedal force prior to recovery may allow the rudder to blow out in the prospin
direction and delay recovery to below 10,000 feet.
AOA increasing past 5 units indicates inverted spin recovery and AOA decreasing through
20 units indicates recovery from an upright spin.
If the aircraft reenters a spin, reapply the departure/spin recovery procedure beginning with
neutral controls.
If out of control passing through 10,000 feet AGL:
9.
EJECT
ALTITUDE LOSS
A Dive Recovery Chart in NATOPS Performance Data permits one to compute the altitude loss given the
dive angle, airspeed, and recovery initiation altitude. The altimeter after recovery will read the recovery
initiation altitude less the computed altitude loss.
OPERATING LIMITATIONS
In chapter 4 of NATOPS, the T-45 Operating Limitations are defined. The basis for prohibited maneuvers
and limitations are not specified, but one may assume that some undesirable outcome will be the result of
exceeding these limits, i.e., a departure or structural damage. Realize there is good reason for these
restrictions, and NATOPS is trying to protect you and the aircraft.
ANGLE OF ATTACK SYSTEM
ANGLE OF ATTACK (AOA)
The angle of attack is the angle formed between the relative wind and the chord line of the airfoil. The
Navy has long used AOA to optimize an aircraft’s approach speed to the aircraft carrier. AOA is more
sensitive than the pitot static airspeed determinations at low speed. At high speed, the reverse is true.
AOA outputs can be used to determine approximate airspeeds for certain functions should the pitot static
system ice up or fail. The pocket checklist contains AOA indications for various aircraft functions.
(7-99) Original
Page 40
Previous Page
