Downloaded from https://www.everyspec.com MIL-STD-81OC b. The test item shall be mounted on the end of the test car in direct ! contact with the floor and adequately blocked and secured to prevent any longitudinal,vertical, or lateral movement. Metal banding. or wire, of sufficient size or strength shall be used to provide additional tiedown strength. Then blockings and tiedowps shall be inspected after each impact. If damaged or loosened, they shall be repaired prior to the next impact. However, tiedown attachments that are built-in parts of the test item shall not be altered or repaired during the test.
Positions of the equipment with respect to the test car and whether or not packaging is necessary shall be specified. If loading and tiedowns are not specified, all loading and tiedowns shall be in accordance with recommended practices of the Association of American Railroads. c. Impact the test car into the two loaded cars. d. Impact shall be made in progressive steps with impacts 8, 9, and 10 miles per hour. The speed just prior to impact shall be measured by electronic or electrical means. 3.9 Related shock tests 3.9.1 High impact. Unless otherwise specified, ballistic shock tests and high impact tests shall be performed in accordance with MIL-S-901. 3.9.2 Shipboard equipment.
Shock tests for shipboard equipment shall be performed in accordance with MIL-S-901. 3.9.3 Rough handling for packaged items. Tests for shipping and.handling shall be performed in accordance with MIL-P-116 or FED-STO-1O1. 3.9.4 Fuzes and fuze components. Shock tests for safety and operation of fuzes and fuze components shall be performed in accordancwwith MIL-STD-331. 3.10 Combined temperature and shock tests. Tests shall be performed at room ambient conditions unless a high or low. temperature shock test is required, in which case the temperature extremes shall be as specified. 4. SUMMARY. The following details shall be as ,specifiedin the equipment spec-on or test plan: a.
Pretest data required (see General Requirements,3.2). b. Procedure number. c. Shock pulse.selection, specify shape, peak value, and duration (see 3.1). 516.”2-7 METHOD 516.2