Trials of underwater blast from Martin-Baker Type 4 ejection seat gun--June, 1961
Rawlins, J.S.
Journal of the Royal Naval Medical Service 48: 57-62
1962
ISSN/ISBN: 0035-9033 PMID: 14490683 Document Number: 10285
Clearly the ideal method of establishing the safety of the Mk. IV seat and Type. 4 gun would be to carry out a series of free-water firings with human and animal subjects but because of the cost of the seats and the considerations discussed this is not possible. It is proposed, therefore, to make further tests with the rig, this time at Admiralty Hydro Ballistic Research Establishment, Glen Fruin, investigating the pressure pattern around the rig by means of arcs of transducers. This should show whether there is any focusing of the pressure waves. Sheep will also be exposed to blast from a Type 3 gun, for human underwater ejections have been made with this without significant injury and any injury to the sheep in this case would strongly suggest that the rig itself was making a major contribution. Lastly, a small number of free-water firings with specially strengthened Mk. Ill and Mk. 1V seats will be necessary to confirm the findings in the rig tests.
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