MS14168A(AS)
TEST H Long taxi. The tire shall be landed on the flywheel rotating at a peripheral speed of 30 mph for 30,000 feet with 6,500 pounds load.
TEST I Catapult condition. The tire shall be accelerated from 0 to 80 mph within 6 seconds at a constant load of 2,000 pounds. Over a distance of 340 feet at a constant speed of 80 mph, the load shall be increased to 40,700 pounds within
0.55 second, decreased to 20,000 pounds within 0.3 second, increased to 40,700 pounds within 0.3 second, decreased to 30,000 pounds within 0.3 second, and increased to 40,700 pounds within 0.45 second. The tire shall be maintained at a load of 40,700 pounds for the remainder of the catapult distance and then unlanded.
TEST J Bruise test. The tire shall be loaded against a 1-5/8 inch diameter length of plain round bar stock or arresting gear cable with a vertical load of 60,000 pounds. After release of this load, the tire shall be subjected to the same loading condition at a location 180 degrees from the initial point of loading.
TEST K Burst test. The tire pressure shall be increased until the tire fails. The pressure, failure description, and location shall be reported in the qualification test report.
Air retention. The tire shall be inflated to a pressure of 400 psi and allowed to stand for 24 hours at which time the pressure drop due to growth shall be replaced. The tire shall then stand for an additional 24 hours at which time the pressure shall be measured and the tire inspected. The air pressure loss shall not exceed 5 percent and the tire shall not reveal any appearance and performance defects such as sidewall blisters, tread separation, etc..
Qualification test report. The qualification test report shall list the results of all qualification tests and construction details of the qualification test sample in the general form shown in figure 4 of MIL-T-5041 with dimensions listed at a rated inflation and 400 psi. A sketch of the tire profile at rated inflation and 400 psi shall be included in the report. The report shall list the manufacturer's test number.
Preparing Activity: Navy - AS
(Project 2620-N310)
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