MIL-PRF-62136B
3.2.1.3 Low temperature brittleness. A test sample of the foam inflatant compound shall
not crack at -50 degrees Fahrenheit ( F) (-45.6 degrees Celsius ( C)) when tested as specified
herein (see 4.6.3).
3.2.1.4 Tear strength. The foam inflatant compound shall withstand a minimum tear
strength of 10 pounds per inch (68.9 kiloPascals (kPa)) as specified herein (see 4.6.4).
3.2.1.5 Rebound. Rebound of foam inflatant compound shall be a minimum of
75 percent when tested as specified herein (see 4.6.5).
3.2.1.6 Toxic chemicals and hazardous substances and ozone depleting. The foam toxic
or ozone depleting compound shall not contain chemicals or hazardous substances (see 4.9.1).
3.3 Design and construction. The foam inflated wheel and tire assembly is composed of
a tire and wheel assembly which is inflated with a synthetic rubber foam that is placed within a
vulcanizer (see drawing numbers 11677545-1, 11677545-2, 11677547-1, and 11677547-2).
3.4 Components.
3.4.1 Tires.
3.4.1.1 Prior to foam inflation. Tires furnished under this specification, before inflation,
shall be of the size and ply rating as specified herein (see table I). The tires shall meet the test
requirements specified herein (see 4.5 and 6.4).
3.4.1.2 After foam inflation. The foam inflated tire and wheel assemblies furnished under
this specification shall have met the requirements of this specification and be in accordance with
part numbers 11677545-1, 11677545-2, 11677547-1 and 11677547-2 (see table I). The tires
shall meet the test requirements specified herein (see 4.8).
3.4.2 Wheel. The wheel shall be of approved design and dimension for the tire as
recommended by the Tire and Rim Association (see 4.9.2).
3.4.3 Foam. The foam shall completely fill the assembly and giving it the desired
performance capabilities (see 4.6.2 and 4.9.1).
3.4.3.1 Weight of foam. The average weight of foam compound required to inflate each
size and type of tire shall be established and the maximum variation from this established weight
shall not be greater than + 10 percent (see 4.9.1).
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