Downloaded from https://www.everyspec.com MIL-STD-81OC b. Forward and rear oscillations cannot be reduced. When vertical linear mode, wooden fences shall be placed on all operated in the four sides of the test item tO constrain its motion to not more than 2 inches in either direction. 4.6.13. Procedure XII. For shipboard and amphibious equipment or when a ship is the common carrier, the vibration test”shall be in accordance with type I of MIL-STD-167. 4.6.14 Procedure XIII. Transportationvibration test for system, van or shelter assemblage. 4.6.14.1 Part 1. DISCONTINUED 4.6.14.2 Part 2, bounce, system shelter assemblage 4.6.14.2.1 Purpose.
To insure that the system shelter assemblage shall be capable of withstanding the vibrations normally induced during transpor- tation. me system shelter assemblage may consist of equipment mounted in. .-, a truck or trailer, or equipment mounted in a shelter which is then mounted on a truck or trailer. transport vehicle shall be adjusted for tactical (off-road)cross-country service. The system shelter assemblage shal1 be driven five times over sections of the Munson Test Course at the Aberdeen proving Ground, Ab,erdeen, Maryland, or approved equal, in the following order and at the specified speeds: 4.6.14.2.2 Performance of test.
lhe “tirepressure of the van or shelter ) Coarse washboard (6-inchwaves spaced 72 inches apart) 5 mph Belgian block 20 mph Radial washboard (2-inch to 4-inch waves) 15 mph Two-inch washboard 10 mph Three-inch spaced bump 20 mph 5. SUMMARY. spec-on The following details shall or test plan: be as specified in the equipment a. Equipment (see 3). category, applicable table, procedtire,figure, and test curve b. Pretest data required (General Requirements, 3.2). S14.2-19 MSTHOD 514.2 D