Jolt test

A.H. Erickson, Ordn 38, 1050-52(1954), Fuze Testing Standards (Tests for fuzes include jolt test, jumble test, vibration test, 40-foot test and other tests) (These tests are described in MIL-STD-331, listed here as Ref 41)... 

Jolt Test.. It consists of assembling the test item into the end of a pivoted arm which under cam action falls by gravity thru 4 inches on a heavy bed plate, giving a considerable jolt. Each item is tested for 1750 jolts, at a std speed of 35 jars per min, in each of three positions vertically up, vertically down horizontal. All fuze expl elements shall be present in the fuze during the test. The jolt testing machine is shown on US Ordnance Corps Drawing 81-3-30. It takes 50 mins to test a sample in each of the three positions, or ca 2lA hrs for a complete test... 

The fixture containing the item rolls inside the box, receiving bumps at random. The box rotates at 35 rpm and the test consists of 3600 revolutions. It takes about 2 A hrs. The jumble test machine is shown on US. Ordnance Corps Drawing 81-3-35. The criteria for passing the test are the same as given under Jolt Test... 

Note Particular care should be exercised in handling test items after the jolt jumble tests a safety shield should be used. The articles may become armed or the expl chge may have sifted out. In these cases, a slight jar may initiate a defective fuze. The jolt test is always run first. Total time for both tests is ca 5 /i hrs... 

Jolt Test 101 is briefly described in Vol 4, p D1095-L, while its revision as Test 101.1 is given in Notice 3 (11 June... 

Environmental Testing, Aeronautical and Associated Equipment Fungus Resistance Tests Jolt Test for Use in Development of Fuzes Jumble Test for Use in Development of Fuzes 40-ft Drop Test for Use in Development of Fuzes Transportation Vibration Test for Use in Development of Fuzes... 

So why now As one of the few who are still alive and able to speak from experience about the details of that decade of testing in the 1960s, I was jolted, as were most citizens, by the events on 11 September 2001. Public fears and misapprehensions about the possible extension of such recklessness to chemical terrorism suddenly began to share the headlines. The real chemical story the story I had long wanted to tell in detail suddenly seemed to be an important one. I realized it was a remarkable story that few were still able to tell. 

Military Standard. "Fuze and Fuze Components, Environmental and Performance Tests for MIL-STD-331 (1966 1967) Class 100. Laboratory Tests - Jolt (101) Jumble (102) Forty-Foot Drop (103) Transportation Vibration (104) Temperature Humidity (105) Vacuum Steam Pressure (106) Salt Spray (Fog) (107) Waterproofness (108) Rain Test (Exposed Fuze Storage) (109) Fungus Resistance (110) Five-Foot Drop (111) Extreme Temperature Storage (112) Thermal Shock (113) Rough Handling (Packaged)... 

In making this test care should be taken that the cylinder is filled each time in exactly the same manner, the sand being poured in slowly and not packed by jolting or shaking. In practice this method has been found to be both rapid and exact (Ref 1, pp7—8 and Ref 4, pll6). This test is mentioned in Vol 3 (Ref 13, pC369) under Coal Mining Explosives, Physical Tests... 

One can think of mescaline and LSD as one pole in the psychedelic field—evoking ego-death and rebirth, visions and much else that can appear with jolting unexpectedness. Most of the tested MDA-like compounds are gathered around the opposite pole—where shocks are rare and the emphasis is on ideas and enchanced rapport with people. 

The quality of building limes is specified in [22.6]. It requires minimum values for standard mortars produced from lime putties — namely penetration and air content — and lists water demand and water retention as parameters that customers may request. It also specifies a minimum volume yield of putty per kg of quicklime. Building limes must also be sound (i.e., pass the popping, pitting and expansion tests). A workability test, based on the spread of a standard mortar on a jolting table, was specified in the 1972 edition of BS 890 [22.11], but is no longer included. 

A representative portion of dry aggregate is placed in a pyknometer, which is then filled with water. The minimum mass per test portion required is given in Table 2.13. The pyknometer is gently rolled and jolted in a tipped position to remove any entrapped air. The entrapped air can also be removed by applying a vacuum. The pyknometer is then placed in a water bath set at 22°C 3°C for 24 0.5 h. 

Jolt. In this test an end item containing explosives is attached to the end of a pivoted arm. The arm is raised to a prescribed height and allowed to drop freely. The end item strikes a leather padded anvil. The test is repeated a prescribed number of times with the end item in a number of different orientations to the anvil. 

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