Hydraulic Subsystems
T-45C TS, ADV & IUT ENG-11
(1) LAUNCH BAR switch is manually selected
to RETRACT and launch bar is held down
by shuttle
(2) As soon as catapult stroke is complete,
spring pressure retracts launch bar
4.
Limitations: launch bar will not extend if nose wheel
is 30 degrees or more from center
5.
Summary:
The launch system consists of the launch bar, drag
brace, and holdback fitting, which are integral to the
NLG and are designed to secure the aircraft to the
catapult mechanism and to transfer catapult energy
to the aircraft during catapult launch.
The launch bar is electrically controlled,
hydraulically extended, and mechanically retracted
through the use of spring-loaded pressure. Three
possible positions apply to the launch bar: taxi
(retracted), launch (extended), and stowed (gear
retracted).
Once the shuttle mechanism has engaged the
launch bar during catapult launches, the LAUNCH
BAR switch is set to RETRACT. Immediately after
takeoff, spring pressure retracts the launch bar.
Cockpit controls and indicators used to operate the
launch bar include the LAUNCH BAR switch and the
L BAR lights.
(9-98) Change 4
Page 11-42
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