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| MIL-S-26688(USAF)
3.4.1 FUNGUS PROOF MATERIALS. - Materials that are nutrients for
fungi shall not be used where it is practical to avoid them. Where
used and not hermetically sealed, they shall be treated with a
fungicidal agent acceptable to the procuring activity. However, if
they will be used in a hermetically sealed inclosure, fungicidal
treatment will not be necessary.
3.4.2 METALS - Metals shall be of the corrosion-resistant type
or suitably treated to resist corrosion due to fuels, salt spray, or
atmospheric conditions likely to be met in storage or normal service.
3.4.2.1 DISSIMILAR METALS. - Unless suitably protected against
electrolytic corrosion, dissimilar metals shall not be used in intimate
contact with each other. Dissimilar metals are defined in MS33586.
3.5 DESIGN. - The seats shall be designed to provide minimum
weight, maximum comfort, attractive appearance, ease of adjustment,
freedom from complicated mechanisms, maximum durability to withstand
rough service usage and handling, and shall permit quick installation
and removal. Parts which are susceptible tO service wear shall be
accessible for repair, removal and replacement without complete
dismantling of the seat. Fasteners shall be provided which enable the
removal and replacement of the seat back: bottom and arm rest cushions
in a minimum of time.
3.5.1 GENERAL STRUCTURE.- Thermoseal straps or equivalent shall
be used on the back and bottom assemblies to form a resilient structure
for the back and bottom cushion assemblies. The seat and back shall
have the maximum developed posture contours, with the use of formed
cushions or padding specified by the procuring activity. Two pockets
shall be provided in each seat back, one for the stowage of a food
tray and the other for the life vest, exposure suit, and miscellaneous
items.
3.5.2 LEG SUPPORTS.- The legs of the seats shall be located as
shown in figures 1, 2 and 3. The base of each leg shall be provided
with a fitting to permit mounting on a track specified by the
procuring activity. All legs shall be foldable to permit the
stowage of seat in a minimum space. On the type I seat the legs
shall be designed to be removed and reinstalled on opposite ends of
the seat to permit installation of seat on either side of the aircrafts.
3.5.3 ARM RESTS. - The seat shall be provided with arm rests
substantially as shown in figure 1 and 2. The centerarm rests of
the type I. seat and one arm rest of thetype II. seat shall be foldable
3
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