DREV setback simulator : design and performance / by C. Bélanger and G.R. Walker. : DR52-9/6-1982E-PDF

"A laboratory machine has been designed, fabricated and put into operation at DREV to simulate the collapsing of a base cavity as the filling of a shell is setback under the high axial acceleration of gun launch. The simulator design followed the recommendations made in a theoretical study by Pasman. Its overall construction is described, including a specimen mounting assembly developed to prevent all leakage of the composition under test. Initial tests simulated a 105-mm shell with accelerations up to 25,000 times the normal acceleration of gravity, loaded with Composition A-3, cast TNT, Composition B and a castable plastic-bonded explosive, with air cavities of 2.5, 1.5 or 1.0 mm height. The explosive was ignited in each instance even though pressures never exceeded about one-third of that found necessary to achieve ignition of Composition B in Picatinny-type simulators. [...]"--abstract (page i).

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