The project stems from a November 1941 request from the British the Ministry of Supply that Canada do some trials of the 40mm Bofors, on a tracked SP mount, in ice and snow conditions. The Bofors and Loyd were married at Petawawa by a couple of artifacers - the gun carriage was bolted directly to the chassis. It tested in an A/Tk role on 18 March 1942.. Reasonable results were obtained, when the vehicle was braced securely four rounds, fachieved four hits on a tank target at 600 yds. On 23 March, the vehicle was sent to the Proving Ground in Ottawa, for to test its road and cross country capabilities. On the whole, it seems to have performed satisfactorily. When the tests were completed and the vehicle disassembled on 5 June, 1942.
Canada had no requirement for tracked SP 40mm as it could not keep up with road convoys.
If these pictures were taken at Pet there may be a few others showing trials of experimnetal equipment.
Roger
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