Other publications. The following document forms a part of this specifi-
to the extent specified herein. The issues of the documents which ar in-
as DoD adopted shall be the issue listed in the current DoDISS and the sup-
thereto, if applicable.
SOCIETY OF AUTOMOTIVE ENGINEERS, INC. (SAE)
(Aerospace Material Specifications)
1979 SAE Handbook, Part 2 -
Section J211b - Instrumentation for Impact Test.
(Application for copies should be addressed to the Society of Automotive Engineers,
Inc., 400 Commonwealth Drive, Warrendale PA 15096.)
(Industry association specifications and standards are generally available for
reference from libraries. They are also distributed among technical groups and using
2.3 Order of precedence. In the event of a conflict between the text of this
specification and the references cited herein, the text of this specification shall
3.1 Specification sheets. The individual item requirements shall be as specified
herein and in accordance with the applicable specification sheets. In the event of
any conflict between requirements of this specification and the specification sheet,
the latter shall govern.
3.2 First article. When specified, a sample shall be sujected to first article
inspection (see 4.4 and 6.3).
3.3 Design characteristics. In general, the "Crash Survival Design Guide". TR-79-
22, volumes A through E, shall be used as a design guide for the seat systems
furnished under this specification. The seat shall accommodate the specified type of
occupant in the quantities identified for each respective size and orientation (see
1.2). The size I seat is the preferred configuration in order to avoid situations
where the energy absorbers of a multi-unit seat are rendered ineffective due to less
than full occupancy. To the maximum extent practical, seat classes (see 1.2) shall
be interchangeable to enhance standardization. Seating should be aft-facing whenever
operational requirements permit. Forward-facing is the next preference. Seating
shall not be side-facing unless absolutely necessary for operational considerations.
It is desirable that all seats face in the same direction so that the seat backs
protect occupants from loose equipment which can become flying projectiles during
crash impact. Fabric, netting or a headrest shall be provided for occupant head/
neck whiplash protection. The seat system shall incorporate an anti-rebound device
(snubber unit) designed to minimize any seat/occupant rebound which may result from
the elasticity within the seat system and the resulting lack of structural rigidity
due to the stroking process. In the event of a hard landing or rough handling of
the seat system, some visual indication of energy absorber stroking, which may
have resulted, shall be provided to alert maintenance personnel.