Grizzly I cruiser
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|Place of origin||Canada|
|In service||1943–1945 (Canada)|
|Wars||Second World War|
|Manufacturer||Montreal Locomotive Works|
|Mass||29.91 t (30 tonnes)|
|Length||19 ft (5.816 m)|
|Crew||5 (Commander, gunner, loader, driver, co-driver/hull gunner)|
|High Velocity 75 mm M3 L/40 gun|
|2 × .30-06 machine gun|
|Engine||Continental R-975 9-cyl radial gas|
400/340 hp (298/254 kW)
|Suspension||Vertical volute spring|
|Speed||24 mph (38.6 km/h)|
The Grizzly I was a Canadian-built M4A1 Sherman tank with some modifications and was fitted with Canadian Dry Pin (CDP) tracks, which did not require rubber, a scarce material in wartime Canada.
After the fall of France, it was decided the nascent Canadian armoured divisions would be equipped by tanks produced in Canada. The result was the Ram cruiser tank, based on the chassis and running gear of the US M3 Lee; Rams were produced by the Montreal Locomotive Works (MLW) from 1941 to 1943. The M3 was succeeded by the superior M4 Sherman. The Allies agreed to standardise on the M4, and MLW began producing the Grizzly in August 1943.
Grizzly production halted when it became apparent US production would be sufficient. Instead, MLW produced the Sexton self-propelled gun Mk II. The Sexton Mk II used the Grizzly chassis, with the upper hull modified to carry the Commonwealth standard QF 25 pounder gun. The Sexton was the Commonwealth counterpart to the US M7 Priest. A small batch of Grizzly medium tank was fitted with an Ordnance QF 17-pounder for training but none saw action.
The Grizzly's suspension used 17-tooth drive sprockets and CDP tracks. In comparison, the M4 used 13 tooth drive sprockets. The CDP track was lighter and simpler than the standard US tracks and did not require rubber, which was scarce since the Japanese advance into Southeast Asia and the conquest of Malaya.
- Bob Semple tank – New Zealand indigenous tank design
- Ram tank – Canadian indigenous tank design
- Schofield tank – New Zealand indigenous tank design
- Sentinel tank – Australian indigenous tank design
- Skaarup, Harold (2011). "Ironsides": Canadian Armoured Fighting Vehicle Museums and Monuments. iUniverse.com. p. 78. ISBN 978-1462034642.
- Roy Thomas. "A forgotten armoured arsenal: The Montreal Locomotive Works". Vanguard Canada.
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