MIL-DTL-45301E
also be cut transversely down to the metal base and separated circumferentially, by hand or by
using a knife, for a sufficient distance to permit a firm gripping of this free end of the tire by the
power actuated clamp. Solvents shall not be used to facilitate this initial separation or any time
during actual stripping. The tire shall be mounted on the hub and spindle assembly and positioned
in such a manner that its axis of rotation will remain parallel to the line of separation during
testing and that the applied force will be normal to the tangent of the wheel or rim at the line of
separation. With the free end of the tire firmly gripped by the machine clamp, the machine clamp
shall be started and the tire completely stripped from the metal base. If during the test the tire
begins to tear instead of separating wholly from the wheel, or rim, the machine shall be stopped
and the tire shall be cut with a knife to the metal base and the test started again. Force
measurements shall be taken and observation made throughout the test to determine the actual
adhesion value. The ambient air temperature during the test shall be between 70°F (21°C) and
110°F (43°C). Loads to be applied shall be as specified in 3.5.3.
4.9.1.3 Blowout (drum).
4.9.1.3.1 Apparatus. To determine conformance to 3.5.4, the testing apparatus shall
consist of a rotating steel wheel drum having a smooth flat-faced rim, against which one or more
test tires, individually mounted on hub and spindle assemblies permitting free tire rotation, are
radially loaded. The steel drum shall have a diameter of 67.23 in. + 0.50 in. (1707 + 12.7 mm)
(1/300 mile circumference) with a rim width providing full support to the tire under the loads
specified herein. During the test, the apparatus shall be located in an air space controlled at a
temperature of 100 + 5°F (38 + 3°C).
4.9.1.3.2 Procedure. The tire shall be mounted on the hub and spindle assembly specified
in 4.9.1.3.1, and ground if necessary, to assure a radial runout of not more than 0.031 in. (0.8
mm) total indicator reading. The tire shall be loaded radially against the drum. The drum test
load shall be determined by multiplying the value obtained from table VIII by the nominal tire
width. The tire shall then be run continuously for 6 hours at 30 mph (48 km/h), under the
following load conditions:
Time
Percentage of load as determined above
Two hours
100 percent
Two hours
110 percent
Two hours
120 percent
At the conclusion of the test operation, the tire shall be examined externally and then internally by
removal of tire from the metal base and subsequent sectioning of the tire to determine
conformance to 3.5.4.
15
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business