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|  MIL-S-18471G(AS)
3.2.2 Subsystem/component design. The following escape system subsystems
and components shall be utilized, as applicable.
a. Ejection seat assembly.
(1) Ejection seat structure and guide rail assembly (see
3.2.2.1).
(2) Ejection seat positioning subsystem (see 3.2.2.2).
(3) Positioning and restraint subsystem (see 3.2.2.3).
(4) Propulsion subsystem (see 3.2.2.4).
(5) Deceleration and stabilization subsystem (see 3.2.2.5).
(6) Recovery subsystem (see 3.2.2.6).
(7) Survival equipment container (see 3.2.2.7).
(8) Personal services connections (see 3.2.2.8).
(9) Intraseat sequencing subsystems (see 3.2.2.9).
(10) Initiation subsystems (see 3.2.2.10).
(11) Signal transmission subsystem (STS) (see 3.2.2.13).
(12) personnel location subsystems (see 3.2.2.14).
(13) Ground safety subsystem (see 3.2.2.16).
b.
Interseat sequencing/spatial separation subsystem (see 3.2.2.11).
c.
Aircraft canopy and escape path clearance subsystem
(see 3.2.2.12).
d.
Classified equipment destruct system initiator (see 3.2.2.15).
3.2.2.1 Ejection seat structure and guide rail assembly. The general
ejection seat assembly geometry shall be as shown in figures 2 and 3. The
ejection seat shall provide comfortable and adequate support during flight
operations and during ejection. The ejection seat shall be contoured
(support surfaces, cushioning, or combinations thereof) to provide support
for the aircrewmember's body. The ejection seat shall be designed so that,
in the normal in-flight position, the aircrewmember's body is positioned to
be coincident with the back tangent at the thoracic region and buttocks and
coincident with the seated surface tangent at the buttocks.
The ejection seat structure shall
3.2.2.1.1
Ejection seat structures.
provide:
a. Space for a survival equipment container.
b. No cause for jamming or snagging of survival equipment
or the survival equipment container.
c. Positive retention of the survival container so that it
does not rock or slide and, under aircraft acceleration
loads, does not separate from the ejection seat.
d. Drain holes to prevent moisture collection.
e. Positioning and restraint subsystem attachment points.
f. Accommodation for the maximum specified population sitting
hip width and support of the maximum and minimum specified
population thigh length.
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