Tank, Cruiser, Ram | |
---|---|
Type | Cruiser tank |
Place of origin | Canada |
Service history | |
Used by | Canada, Netherlands |
Wars | Second World War |
Production history | |
Designed | 1941 |
Manufacturer | Montreal Locomotive Works |
Produced | November 1941 – July 1943 |
No. built | 2,032 |
Specifications (Ram Mk II) | |
Mass | 65,000 lb (29 t) |
Length | 19 ft (5.8 m) |
Width | 9 ft 10 in (3.00 m) |
Height | 8 ft 9 in (2.67 m) |
Crew | 5 (Commander, gunner, loader, driver, co-driver/hull gunner) |
Armour | 25–87 mm |
Main armament | QF 6 pdr Mk III 92 rounds |
Secondary armament | 3 × .30 in (7.62 mm) machineguns (Ram I 4,715 rounds, Ram II 4,440 rounds. [1] ) |
Engine | Continental R-975 9-cyl radial gasoline engine 400 (298 kW) |
Power/weight | 12.3 hp/ton |
Transmission | Borg-Warner clutch, controlled differential |
Suspension | Vertical volute spring |
Operational range | 232 km (144 mi) |
Maximum speed | 25 mph (40 km/h) |
The Tank, Cruiser, Ram was a cruiser tank designed and built by Canada in the Second World War, based on the U.S. M3 Medium tank chassis. Due to standardization on the American Sherman tank for frontline units, it was used exclusively for training purposes and was never used in combat as a gun tank. The chassis was used for several other combat roles however, such as a flamethrower tank, observation post and armoured personnel carrier.
Even before the loss of the majority of the United Kingdom's tank force in France in 1940 after Dunkirk, it was recognised that tank production in the UK at the start of the war was insufficient and capacity in the US was taken for British needs. [2] So it was necessary that if Canada was to equip with tanks they would have to be manufactured locally. [3] In June 1940 the Canadian Pacific Railway's Angus Shops in Montreal, as the only large firm with spare capacity, had received a contract to produce 300 partially fitted out Valentine tanks for the British; this was followed later with one for 488 complete tanks for Canada. [4] However the Valentine was an infantry tank and Canada required a cruiser tank for its recently formed armoured division. In the end 1,420 Valentines were produced by CPR, most of which were supplied to the USSR. Although the Valentine used a number of American produced parts, its reliance on British components, difficulties in adapting its manufacture to North American methods, and other problems such as limitations to the availability of the right type of armour plate affected Valentine production. The Canadian Joint Committee on Tank Development concluded, in September 1940, that its cruiser tank should be based on a US rather than a British design. [5] This would be quicker and allow it to use components already in production for the US design. [6]
The Canadians were interested in production of the M3 Medium. However the M3 was an interim design; its main armament was in a side sponson, it was tall and under-armoured, and it was clear that it would be unsatisfactory for Canadian and British use. In early 1941 the Canadian Interdepartmental Tank Committee adopted a compromise: to develop a superior design locally but still using the M3 chassis. [7] The British Tank Mission which was involved in the modifications of the M3 for British use contributed a tank expert, L.E. Carr, to design a new hull and turret for the Canadian tank which could take a 6-pounder (57 mm) or 75mm gun while retaining the lower hull of the US M3 Medium. [8]
The new hull was cast rather than welded or riveted and lower than that of the M3. The pilot model's turret and upper hull casting was produced in the US by General Steel Castings and later they aided the set up of Canadian production. [3] Montreal Locomotive Works (MLW) was chosen to make the new Canadian M.3 Cruiser Tank (as it was then known) and was given the funding to set up the Canadian Tank Arsenal at Longue Pointe. MLW was a subsidiary of the American Locomotive Company, which had experience in producing large castings and Alco was producing cast hulls for the M3 Medium.
Canadian engineers ran into many challenges when developing the tank as Canada had never produced a tank before. Along with the lack of knowledge, it took time for Canadian factories to gear up for the production of many of the Ram's components.
Initially Canada relied heavily on United States and British materials to complete the construction of the Ram. Most critically the Ram's Continental engine and transmissions were available only in the USA and these were always in short supply. The Ram tank was developed with a turret which unlike the US M3 could traverse the main armament 360 degrees. Its fully cast armoured steel hull gave reinforced protection and, with the driver's seat repositioned to meet British requirements for right-hand drive, [3] lower height; while the U.S.-designed chassis and power train ensured its overall reliability. [9]
Although it could mount a US 75 mm gun, the preferred armament for the Ram was the QF 6 pounder which had superior armour-piercing capability. As neither the 6 pounder nor the Canadian-designed mounting for it was immediately available, early production (50 tanks) were fitted with the 40 mm QF 2-pounder gun. [8] [10]
A prototype Ram was completed in June 1941 and general production of the Ram I began in November of the same year. The Ram I and early Ram IIs were fitted with side doors in the hull and an auxiliary machine gun turret in the front. The former weakened the hull and complicated production, and the doors and the machine gun turret were discarded in later modifications. By February 1942 production had switched to the Ram II model with a 6-pounder gun and continued until July 1943. In March 1942 a decision had been made to change production over to the automotively-similar M4A1 Sherman tank for all British and Canadian units. Ram production continued due to delay in starting the new M4 production lines and a reluctance to let the plant lie idle. [3] By July 1943 1,948 vehicles plus 84 artillery observation post (OP) vehicles had been completed.
The official Canadian history of the war compares the Ram to the Ross rifle as examples of unsuccessful Canadian weapon designs. It states that given the Sherman's superiority, in retrospect it would probably have been better for the United States to produce more tanks, and for Canada to have focused on manufacturing more transport vehicles such as the successful Canadian Military Pattern truck designs. The Sexton self-propelled gun based on the Ram chassis, however, was very successful. [11]
As built, the Ram was never used in combat as a tank, but was used for crew training in Canada and Great Britain up to mid 1944. The observation post vehicles and Armoured Personnel Carrier, gun tractor, and munitions carrier versions of the Ram saw considerable active service in North West Europe. These tanks were mainly rebuilt by Canadian Army workshops in the United Kingdom. Conversions of Ram tanks with the Wasp II flamethrower gear were used by the 5th Canadian Armoured Brigade in the Netherlands in 1945. [12]
In 1945 the Royal Netherlands Army got permission from the Canadian government to take free possession of all Ram tanks in army dumps on Dutch territory.[ citation needed ] Those not already converted into Kangaroos were used to equip the 1st and 2nd Tank Battalion (1e en 2e Bataljon Vechtwagens), the very first Dutch tank units. These had a nominal organic strength of 53 each. However it proved to be impossible to ready enough tanks to attain this strength because the vehicles were in a very poor state of maintenance. In 1945 it was also reported that the Dutch government was negotiating the purchase of 44 Ram tanks that were stationed in England alongside the purchase of other military equipment of Canadian origin. [13] [14] [15] In 1947 the UK provided 44 Ram tanks from its stocks, that were in a better condition.[ citation needed ] Forty of these had been rebuilt with the British 75 mm gun; four were OP/Command vehicles with a dummy gun. This brought the operational total for that year to just 73, including two Mark Is.[ citation needed ] In 1950 only fifty of these were listed as present. The Ram tanks (together with the Sherman tanks of the three other tank battalions, in part simply taken without permission) were replaced by Centurion tanks leased by the U.S. Government in 1952.[ citation needed ] Some Ram tanks were used in the 1950s as static pillboxes in the IJssel Line, their hulls dug in and embedded within two feet of concrete.
One Dutch Ram tank, an OP/Command vehicle, survives at the Dutch Cavalry Museum in Amersfoort.
A Ram tank modified as a Kangaroo serves as a memorial to the 1st Canadian Armoured Carrier Regiment in Mill, Netherlands.
Ram tanks can also be seen at the Canadian War Museum (the Kangaroo version), in Worthington Park at Canadian Forces Base Borden, in front of the Beatty Street Drill Hall in Vancouver, and at the Bovington Tank Museum (both a tank [16] and a Kangaroo [17] )
A Ram Tank can also be seen outside of the Armoured Trial and Development Unit based at Bovington Camp.
In addition, a Ram was used in an attempt to produce a self-propelled QF 3.7 inch AA gun but got no further than testing. [18]
Tanks of comparable role, performance, and era
Other Commonwealth Tanks of the Second World War
The M3 Lee, officially Medium Tank, M3, was an American medium tank used during World War II. The turret was produced in two forms, one for US needs and one modified to British requirements to place the radio next to the commander. In British Commonwealth service, the tank was called by two names: tanks employing US-pattern turrets were called "Lee", named after Confederate general Robert E. Lee, while those with British-pattern turrets were known as "Grant", named after Union general Ulysses S. Grant.
The Tank, Infantry, Mk IV (A22) Churchill was a British infantry tank used in the Second World War, best known for its heavy armour, large longitudinal chassis with all-around tracks with multiple bogies, its ability to climb steep slopes, and its use as the basis of many specialist vehicles. It was one of the heaviest Allied tanks of the war.
The Cromwell tank, officially Tank, Cruiser, Mk VIII, Cromwell (A27M), was one of the series of cruiser tanks fielded by Britain in the Second World War. Named after the English Civil War–era military leader Oliver Cromwell, the Cromwell was the first tank put into service by the British to combine high speed from a powerful, reliable engine and reasonable armour. The intended dual-purpose high-velocity gun could not be fitted in the turret, so a medium-velocity dual-purpose gun was fitted instead. Further development of the Cromwell combined with a high-velocity gun led to the Comet tank.
The AC1 Sentinel was a cruiser tank designed in Australia in World War II in response to the war in Europe, and to the threat of Japan expanding the war to the Pacific or even a feared Japanese invasion of Australia. It was the first tank to be built with a hull cast as a single piece, and the only tank to be produced in quantity in Australia. The few Sentinels that were built never saw action as Australia's armoured divisions had been equipped by that time with British and American tanks.
Crusader, in full "Tank, Cruiser Mk VI, Crusader", also known by its General Staff number A.15, was one of the primary British cruiser tanks during the early part of the Second World War. Over 5,000 tanks were manufactured and they made important contributions to the British victories during the North African campaign. The Crusader tank would not see active service beyond Africa but the chassis of the tank was modified to create anti-aircraft, fire support, observation, communication, bulldozer and recovery vehicle variants.
The Tank, Cruiser, Mk I (A9) was a British cruiser tank of the interwar period. It was the first cruiser tank: a fast tank designed to bypass the main enemy lines and engage the enemy's lines of communication, as well as enemy tanks. The Cruiser Mk II was a more heavily armoured adaptation of the Mark I, developed at much the same time.
The Tank, Cruiser, Mk II (A10), was a cruiser tank developed alongside the A9 cruiser tank, and was intended to be a heavier, infantry tank version of that type. In practice, it was not deemed suitable for the infantry tank role and was classified as a "heavy cruiser". It served briefly in World War II.
The 25pdr SP, tracked, Sexton was a Canadian-designed self-propelled artillery vehicle of the Second World War. It was based on Canadian-built derivatives of the American M3 Lee and M4 Sherman tank chassis. Canada had set up to produce the Ram tank using the M3 chassis and Grizzly to complement US medium tank production; when Sherman production in the US expanded and supply was no longer a problem, it was decided in 1943 to switch the Canadian production lines to produce the Sexton to give the British Army a mobile artillery gun using their 87.6 mm (3.45 in) Ordnance QF 25-pounder gun-howitzer for commonality with towed guns. The Sexton could fire either HE shell or an armour-piercing shell. It found use in the Canadian, British, and other British Commonwealth armies, as well as other countries. After the war, a number of Sextons and Grizzlies were sold to Portugal, which used them into the 1980s.
The Ordnance Quick-Firing 17-pounder was a 76.2 mm (3 inch) gun developed by the United Kingdom during World War II. It was used as an anti-tank gun on its own carriage, as well as equipping a number of British tanks. Used with the APDS shot, it was capable of defeating all but the thickest armour on German tanks. It was used to "up-gun" some foreign-built vehicles in British service, notably to produce the Sherman Firefly variant of the US M4 Sherman tank, giving British tank units the ability to hold their own against their German counterparts. In the anti-tank role, it was replaced after the war by the 120 mm BAT recoilless rifle. As a tank gun, it was succeeded by the 84 mm 20 pounder.
The cruiser tank was a British tank concept of the interwar period for tanks designed as modernised armoured and mechanised cavalry, as distinguished from infantry tanks. Cruiser tanks were developed after medium tank designs of the 1930s failed to satisfy the Royal Armoured Corps. The cruiser tank concept was conceived by Giffard Le Quesne Martel, who preferred many small light tanks to swarm an opponent, instead of a few expensive and unsatisfactory medium tanks. "Light" cruiser tanks carried less armour and were correspondingly faster, whilst "heavy" cruiser tanks had more armour and were slightly slower.
The 105 mm howitzer motor carriage M7 was an American self-propelled artillery vehicle produced during World War II. It was given the service name 105 mm self propelled, Priest by the British Army, due to the pulpit-like machine gun ring, and following on from the Bishop and the contemporary Deacon self-propelled guns.
The Ordnance QF 2-pounder, or simply "2 pounder gun", was a 40 mm (1.575 in) British anti-tank gun and vehicle-mounted gun employed in the Second World War.
A Kangaroo was a Canadian armoured personnel carrier (APC) during the Second World War which was created by converting a tank chassis. Kangaroos were created as an expedient measure "in the field" by the Canadian Army, and were so successful that they were used by other Commonwealth forces, including the British Army.
This article lists British armoured fighting vehicle production during the Second World War. The United Kingdom produced 27,528 tanks and self-propelled guns from July 1939 to May 1945, as well as 26,191 armoured cars and 69,071 armoured personnel carriers.
The United States provided tens of thousands of its Medium Tank M4, also named the Sherman, to many of its Allies during the Second World War, under the terms of Lend-Lease.
The British Army made extensive use of a variety of combat vehicles during the Second World War. This article is a summary of those vehicles.
The Grizzly I was a Canadian-built M4A1 Sherman tank with relatively minor modifications, primarily to stowage and pioneer tool location and adding accommodations for a Number 19 radio set. They used the same General Steel hull castings as late Pressed Steel-built M4A1(75)s, to include both the standard hull and the later ones with the armour thickened over the ammo bins. Grizzlies were originally built with US style tracks and sprockets. It was only later that they were refitted with Canadian Dry Pin (CDP) tracks, which did not require rubber.
The history and development of tanks in the Royal Canadian Armoured Corps can be broken down into smaller categories: their origin during World War I; the interwar period; World War II; the Cold War; and the modern era.