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Ejection seat fore and aft adjustment |
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|  MIL-S-18471G(AS)
and an automatic backup means. Devices that preclude ejection such as
interlocks shall not be used.
3.2.2.2.3 Ejection seat fore and aft adjustment. Fore and aft adjustment
of the ejection seat within the cockpit shall be provided, if necessary, to
ensure efficient aircrewmember performance of flight operations
3.2.2.3 Positioning and restraint subsystem. The positioning and restraint
subsystem shall be integral with the ejection seat assembly and shall, as a
minimum, include a torso restraint subsystem, shoulder restraint take-up
mechanism limb restraint subsystem, and restraint system manual release. The
positioning and restraint subsystem shall:
Meet applicable human factors requirements specified herein.
a.
Incorporate restraint attachment fittings which are located
b.
and oriented to permit positive connection and simple and
rapid release. Release shall be able to be accomplished by
either gloved hand of the unassisted aircrewmember. No more
than seven attachment fittings shall be required for normal
egress. For emergency egress (with the survival kit), no
more than three devices shall be required to be manually
activated, including the manual release handle specified in
3.2.2.3.4. Single point restraint subsystem release means
are permitted.
Provide adequate restraint during in-flight accelerations,
c.
when commanded by the aircrewmember, under any combination
of the dynamic, loadings ranging throughout the flight envelope
as defined by the aircraft detailed specifications. While
restrained, the aircrewmember shall be able to control torso
movements to the degree necessary to reach and operate
emergency and flight controls. The means employed to provide
the restraint shall permit the aircrewmember to control
the degree of restraint achieved and of the subsequent
restraint relaxation.
Ensure that the combination of release and restraint controls
d.
also provide positive, simple, and rapid connection in multi-
crew aircraft in which aircrewmembers may be required to
leave their stations during flight.
Automatically and in a programmed sequence, position and
e.
restrain the aircrewmember during the period from initiation
of the escape sequence until separation from the ejection
seat.
Prevent submarining of the lower torso during ejection.
f.
Incorporate a positioning and restraint subsystem automatic
g.
release which will, as part of the programmed ejection
sequence, separate the aircrewmember from the ejection
seat during the recovery subsystem phase and prior to
touch down.
3.2.2.3.1 Torso restraint subsystem. The torso restraint subsystem
shall be compatible with all combinations of specified personnel clothing and
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