Rotter impact test

Rotter Impact Test. British test designed by Dr Rotter of Research Dept, Woolwich,... 

In the Rotter impact test, the explosive samples are subjected to... 

Rotter Impact Test. See Fl(Figure of Insensitiveness) and also under Impact Teats... 

Rotter Impact Test. See under Impact, Initiation of Explosion By in Vol 7,137-L ff... 

The mallet test provides data required to classify explosives into three categories. When combined with the FI of the explosive from the Rotter impact test, the mallet test yields the categories ... 

In the Rotter impact test, the explosive samples are subjected to impact by a heavy weight, i.e. 5 kg, from different heights. The percentage of samples which ignite at a given height is noted. 

Examples of equipment for mechanical shock or impact testing are the BAM Fallhammer, the Rotter test, the thirty kilogram Fallhammer test, and the Bureau of Mines Impact Apparatus [45]. The latter is shown in Figure 2.31. 

The Rotter procedure and its modification, as described, give no information as to the nature of the reaction that is taking place in the expl, but show only that a certain amount of decomposition has occurred. An impact test is used as a guide to industrial handling practices and it is useful to know if gas is produced by a deton or a burn. A material that bums is likely to be safer than one that detonates. In 1954... 

R. Pape, 5 The Significance of the Figure of Insensitm-ness obtained from Impact Tests on the Rotter Machine , ERDE Tech Memo No 14/M/54(1954) 4) H.N. Mortlock... 

Explosive substances can therefore be classified into three main groups using the results of the impact and friction sensitivity tests. These classes are very sensitive , sensitive and comparatively insensitive . By using the results of the tests carried out on the Rotter Impact Machine, explosive materials can be categorized into these three classifications as shown in Figure 4.2. 

N 13.59%. Two mildly expl isomers were prepd by nitrating the corresponding diols cis-Cyclohexane - 1,2-diol Dinitrate, prismatic rods (from hot ligroin), mp 24.5 25°, nQ 1.4790 at 21° impact test value with 2 kg wt (Rotter machine) 60 cm vs 100 cm for TNT fumes at 170° Bergmann-Junk test 0.67 mg NO evolved/ lg sample in 20 hrs at 106°... 

To test these theoretical predictions a number of initiation experiments using both a modified version of the NOL large scale gap test and also the Rotter drop weight impact test have been conducted. The experimental details of these tests have been described in a previous publication (Ref 22). 

Brief mention of impact machines is made under Physical Tests in Vol 1, p XVII. Because there are many literature references to the following impact machines, and not because they are inherently better than any others, we will now describe the following Explosives Research Laboratory (ERL), Rotter, Bureau of Mines (BOM) Picatinny Arsenal (PicnArsn)... 

FI Test (Figure of Insensitiveness Test)(Brit). An Impact Sensitiveness Test devised about 1908 by Dr G. Rotter at the British Government Research Establishment, Woolwich Arsenal. Important changes were introduced in the method in 1966 by Mortlock and Wilby (Ref 4). The original method and the modifications are described... 

Both the US B of M and PA Impact Uadbinea have been used at Picatlnny Arsenal for the testing of liquid ezpls, with a modification in sample handling required only in the case of the BM appaiatus(Refs 12a St 16) Dr Rotter of the Research Dept, Woolwich, England, designed an apparatus and a method of teatiogfRefs 3 St 6), which is claimed to be more accurate than other known methods. This is now an official British test and the value obtained is known as FlfPigure of Insensitiveness) (qv)... 

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