Downloaded from https://www.everyspec.com MIL-STD-810C The lifted edge of the chassis is just below the point ( c. of perfect balance. Let the chassis drop back f:eely tothe horizontal bench top. Repeat, using other practical edges of the same horizontal face as pivot points, I for a total of four drops. Step 2 - Repeat step 1, with the test item resting on other faces until it has been dropped for a total of four times on each face on which the test item could be placed practic- ably during servicing. The test item shall not be opera- ting during the test.
At the conclusion of the test, the test item shall be operated and inspected and results ob- tained in accordance with General Requirements, 3.2. 3.8 Procedure VI, rail impact test. This procedure shall be used to determine the effect that impact, due to shipping by rail will have on equipment. If an item can be shipped in two orientations, it shall be impacted once in each direction of each orientation at speeds of 8, 9, and 10 miles per hour f5 percent (total of 12 impacts). If an item can be shipped only in one orientation, it shall be impacted twice in each direction of that orientation at speeds of 8, 9, and 10 miles per hour (a total of 12 impacts). 3.8.1 Apparatus.
The following equipment will be necessary to perform this test: b. A prime mover for moving the cars. a. Three ordinary railroad cars, with standard.draft gear couplings,.” c. A calibrated means to determine that the speed at the time of impact is 8, 9, 10 mph, within *5.percent. d. / Accelerometers and associated c~.rcuitryto measure.the impact shock, and equipment response, if these measurements are spe~ified. / a. Two cars will act as buffer cars and bey.l’~cated on a level section of track. The airbrakes shall be set in the emergency applicationposition on both cars. The total buffer load excluding car weights shall be 140,000 pounds minimum.
3.8.2 Performance of test METHOD 516.2 516.2-6