MIL-DTL-5578D
3.3 Materials. The materials used in the manufacture of self-sealing fuel cells shall conform
to applicable Government specifications. The use of magnesium is prohibited.
3.4 Design. The self-sealing fuel cells shall be designed for use with fuels conforming to
ASTM-D910, MIL-DTL-5624, MIL-DTL-83133, or all three and shall be designed in
conjunction with the containing structure to avoid concentration of loads on splices, seams,
fittings, or locations of concentrated flexure. The assembly consisting of the cell(s) and aircraft
structure on which it is mounted shall be strong enough to handle the stresses caused by the
following:
a. Flexing resulting from vibration
b. Impact loads incident to takeoff, taxiing, and landing (including catapulting and
arresting)
c. Hydraulic surge of fuel incident to all dynamic conditions of flight
d. Hydraulic surge of fuel incident to gunfire
e. Pressure from hydrostatic head of fuel during level flight or maneuvers
f. Pressure from neutral gases, if any, used to pressurize fuel cells
3.4.1 Dimensions. The dimensions and dimensional tolerances shall be developed by the
contractor or Government procuring activity. The dimensional tolerance specified shall be such
that the capacity of the production tanks is within 1.5 percent of the designed total capacity.
3.4.2 Capacity. The head-versus-volume curve on production tanks shall conform within 1.5
percent to the average head-versus-volume curve prepared in accordance with 4.3.2.1.
3.5 Construction. The following requirements apply to fuel cell construction intended for
protection levels (A) and (B) and for the self-sealing portions of fuel cell construction intended
for protection levels (C) and (D) (see 4.2.1.1). The non-self-sealing portions of construction
shall conform to MIL-DTL-6396, Type II, Class B.
3.5.1 Inner-layer ply. The construction shall be such that it will be impossible to transmit
fuel to the sealant. If necessary to meet this requirement, a special barrier shall be utilized. The
inner-layer ply shall be free of foreign matter, and the thickness shall agree with the approved
construction within the established manufacturing tolerances as described in the manufacturer's
specifications.
5
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business