Cavalier tank

Last updated

Tank, Cruiser, Mk VII Cavalier (A24)
Type Cruiser tank
Place of origin United Kingdom
Service history
In service1942–1945
Used byUnited Kingdom, Free France
WarsSecond World War
Production history
DesignerNuffield Mechanization & Aero Limited
Designed1941
Manufacturer Nuffield Mechanization & Aero Limited
Produced1942
No. built500
Specifications
Mass27 long tons (27 tonnes)
Length20 ft 10 in (6.35 m)
Width9 ft 6 in (2.90 m)
Height8 ft (2.44 m)
Crew5 (Commander, gunner, loader, driver, co-driver)

Armour 20–76 mm (0.79–2.99 in)
Main
armament
QF 6 pounder, 64 rounds
Secondary
armament
2 x 7.92 mm Besa machine gun, 4,950 rounds
Engine Nuffield Liberty petrol
410 horsepower (310 kW)
Power/weight14.9 hp (11.2 kW) / tonne
SuspensionImproved Christie
Operational
range
165 mi (266 km)
Maximum speed 24 mph (39 km/h)
off road 14 mph (23 km/h)

The Tank, Cruiser, Mk VII Cavalier (A24) was an interim design of British cruiser tank during the Second World War.

Contents

It was derived as a follow on from the Nuffield's A15 Crusader tank as it was expected to enter production in 1942. A parallel effort under Leyland Motors and Birmingham Railway Carriage and Wagon Company to the same specification resulted in the A27 Cromwell and Centaur tanks which was accepted for service in preference to the Cavalier.

Development

Early Development

Development of the Cavalier initially started as development of the Cromwell tank. In mid-1940, the British were considering which tank should follow on from the new cruiser tanks then being developed. A specification was drawn up by the Directorate of Tanks and Transport which included the 57 mm QF 6 pounder gun. This led to General Staff specification A23 for a cruiser version of the A22 Churchill tank from Vauxhall, and A24 from Nuffield Mechanization & Aero Limited based upon their Crusader tank design. Birmingham Railway Carriage and Wagon Company (BRC&W) also submitted a design based on the Crusader. [1]

The Nuffield design used an uprated -410 hp (310 kW)- Liberty engine which was expected to give a top speed of 24 mph (39 km/h). Armour would be from 63 to 70 mm (2.5 to 2.8 in) at the front, and the 6 pounder gun would be in a turret on a 60-inch (1.5 m) turret ring.

The Tank Board meeting in January 1941 decided that as the tank needed to be in production by early 1942 it should be based upon an existing design to avoid the need for prototypes. Six tanks of the A24 Nuffield design were ordered that month, and the tank was given the name "Cromwell".

Separation from Cromwell

Rolls-Royce's design team, working with Leyland's engineers, produced the Meteor engine from their Merlin aero-engine. This gave a higher output than the Liberty for a similar size. Initially intended to be fitted to the A24, the new engine was not acceptable to Nuffield. [2] [ page needed ]

Working with Rolls-Royce and Leyland, BRC&W were able to produce a prototype of their version of the Cromwell design using the Meteor. This spawned a new specification for Cromwell, A27, using a new Leyland transmission. Leyland later had doubts about the Meteor and wanted to manufacture the Liberty instead, splitting the Cromwell programme further into A24, A27L, and A27M (the latter two denoting Liberty and Meteor engines)

The General staff specifications now covered three tanks: A24 "Cromwell I" from Nuffield, A27L (Liberty engine) "Cromwell II" from Leyland and A27M (Meteor engine) "Cromwell III".

To avoid confusion Cromwell I was renamed "Cavalier". The Cromwell II become "Centaur" and the Cromwell III remained as the "Cromwell". [3]

Production and design efforts separated from A27, and Cavalier became a separate tank.

Production

At the end of 1941, it was decided production of the Nuffield design would be by Nuffield and Ruston and Hornsby. The schedule had already slipped due to work on other projects and work to fit the 6-pounder to the Crusader tank. The first tank began trials in March 1942. Production versions of the Cromwell delivered first, and provided greater performance than the Cavalier. [2] [ page needed ] Cavalier was judged unsatisfactory and the Nuffield order was reduced to 500 tanks. It never entered front-line service.

Design

Internally, the Cavalier was subdivided by bulkheads, which also functioned as structural members. The driver and hull gunner were in the front compartment, the fighting compartment was in the centre. The bulkhead behind the fighting compartment was the firewall from the engine, a Liberty Mark IV, and the final bulkhead separated the engine from the transmission.

Mechanically, the Cavalier was similar to the preceding Crusader tank, using Wilson steering and the Liberty engine. The newer Liberty Mark IV gave more power than the one in the Crusader. The operation of the steering brakes and gear changing remained pneumatic.

Outwardly, the design of Cavalier is very similar to the related Cromwell and Centaur. Cavaliers do not have the upper air intake of Cromwell, which is optional on the Centaur. Cavalier has shorter suspension arms. Cavaliers were built with hull types A and B. Exhaust exits through the hull rear plate using Crusader style angled louvres, [4] where Cromwell and Centaur both exhaust to the vehicle top.

The Cavalier turret was a six sided boxy structure. The mantlet was internal with a large opening in the front of the turret for the gun barrel, the coaxial Besa machine gun and the aperture of the No. 39 telescopic sight. The gun was of the "free elevation" type; the gun was balanced such that it could be readily moved by the gunner. This fitted with British practice of firing on the move.

Service history

Those that were built were used in training or auxiliary armoured vehicle roles. At least 12 Cavaliers were provided to France in 1945, and were operated by the 12th Dragoon Regiment of the French 14th Infantry Division.

Variants

Cavalier OP
Produced in 1943. The gun was replaced with a dummy barrel freeing up room in the turret and hull for extra radios. It was then used as an artillery observation post.
Cavalier ARV
The turret was removed and an A-frame jib and associated equipment added for use as an armoured recovery vehicle.

Surviving vehicles

Only two vehicles are thought to have survived.

Related Research Articles

<span class="mw-page-title-main">Matilda II</span> British Army tank of World War II

The Infantry Tank Mark II, best known as the Matilda, is a British infantry tank of the Second World War.

<span class="mw-page-title-main">Valentine tank</span> British infantry tank

The Tank, Infantry, Mk III, Valentine was an infantry tank produced in the United Kingdom during World War II. More than 8,000 of the type were produced in eleven marks, plus various specialised variants, accounting for approximately a quarter of wartime British tank production. The many variants included riveted and welded construction, petrol and diesel engines and a progressive increase in armament. It was supplied in large numbers to the USSR and built under licence in Canada. It was used extensively by the British in the North African campaign. Developed by Vickers, it proved to be both strong and reliable.

<span class="mw-page-title-main">Cromwell tank</span> British WWII cruiser tank

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.

<span class="mw-page-title-main">Sentinel tank</span> Australian cruiser 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.

<span class="mw-page-title-main">Crusader tank</span> British WWII cruiser tank

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.

<span class="mw-page-title-main">Cruiser Mk II</span> British cruiser tank

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.

<span class="mw-page-title-main">Comet (tank)</span> British cruiser tank

The Comet tank or Tank, Cruiser, Comet I (A34) was a British cruiser tank that first saw use near the end of the Second World War, during the Western Allied invasion of Germany. The Comet was developed from the earlier Cromwell tank and mounted the new 17 pdr High Velocity (HV) gun, in a lower profile, partly-cast turret. This gun was effective against late-war German tanks, including the Panther at medium range, and the Tiger.

<span class="mw-page-title-main">Cruiser Mk VIII Challenger</span> British WWII cruiser tank

The Tank, Cruiser, Challenger (A30) was a British tank of World War II. It mounted the QF 17-pounder anti-tank gun on a chassis derived from the Cromwell tank to add anti-tank firepower to the cruiser tank units. The design compromises made in fitting the large gun onto the Cromwell chassis resulted in a tank with a powerful weapon and reduced armour. However, the extemporised 17-pounder Sherman Firefly conversion of the US-supplied Sherman proved easier to produce and, with delays in production, only 200 Challengers were built. The Challenger was able to keep up with the fast Cromwell tank and was used with them.

<span class="mw-page-title-main">Cruiser tank</span> Tank

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.

<span class="mw-page-title-main">Rolls-Royce Meteor</span> Reciprocating internal combustion engine

The Rolls-Royce Meteor later renamed the Rover Meteor is a British tank engine that was developed during the Second World War. It was used in British tanks up to 1964. It was a result of co-operation between Leyland Motors and Rolls-Royce who between them in 1941 had suggested that a specialised de-rated version of the Merlin aero-engine would be highly suitable for use in armoured fighting vehicles.

<span class="mw-page-title-main">Tortoise heavy assault tank</span> British assault gun design/prototype

The Tortoise heavy assault tank (A39) was a British heavy assault gun design developed during the Second World War, but never put into mass production. It was developed for the task of clearing heavily fortified areas such as the Siegfried Line and as a result favoured armour protection over mobility.

<span class="mw-page-title-main">Covenanter tank</span> British WWII cruiser tank

The Cruiser tank Mk V or A13 Mk III Covenanter was a British cruiser tank of the Second World War. The Covenanter was the first cruiser tank design to be given a name. Designed by the London, Midland and Scottish Railway as a better-armoured replacement for the Cruiser Mark IV, it was ordered into production in 1939 before pilot models were built. Problems with the design became apparent only after production was under way.

<span class="mw-page-title-main">Cruiser Mk III</span> British WWII cruiser tank

The Tank, Cruiser, Mk III, also known by its General Staff specification number A13 Mark I, was a British cruiser tank of the Second World War. It was the first British cruiser tank to use the Christie suspension system, which gave higher speeds and better cross-country performance; previous cruiser tank models had used triple wheeled bogie suspension.

<span class="mw-page-title-main">Cruiser Mk IV</span> British WWII cruiser tank

The Cruiser Tank Mk IV was a British cruiser tank of the Second World War. It followed directly on from the Tank, Cruiser, Mk III. The first Mk IVs were Mk IIIs with extra armour fitted to the turret. Later Mk IVAs were built with the complete extra armour. The tank was used in France in 1940 and in the early part of the war in North Africa, before being withdrawn from service. A fast vehicle compared to other British tanks of the early part of the war, it was probably the best tank Britain had in 1940. In total, 955 of these tanks were built.

<span class="mw-page-title-main">Excelsior tank</span> British experimental infantry tank

The Tank, Heavy Assault, A33 (Excelsior) was a British experimental heavy tank based on the Cromwell (A27) design developed in the Second World War. It was developed when there were concerns as to performance of the Churchill tank.

<span class="mw-page-title-main">Valiant tank</span> British assault tank prototype

The Tank, Infantry, Valiant (A38) was a British tank design of the Second World War that only reached the prototype stage. It was intended to meet a specification for a well-armoured, light-medium tank, for use against Japanese forces in the South-East Asia theatre. The prototype demonstrated that the design was a failure and this sole example produced was retained by the School of Tank Technology as a lesson to its students.

<span class="mw-page-title-main">Liberty L-12</span> American aircraft engine

The Liberty L-12 is an American water-cooled 45° V-12 aircraft engine displacing 1,649 cubic inches (27 L) and making 400 hp (300 kW) designed for a high power-to-weight ratio and ease of mass production. It saw wide use in aero applications, and, once marinized, in marine use both in racing and runabout boats.

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.

<span class="mw-page-title-main">Nuffield Mechanizations and Aero</span>

Nuffield Mechanizations and Aero Limited, also known as Mechanizations and Aero Ltd and Nuffield Mechanizations Ltd was Lord Nuffield's personal enterprise developing improved methods for mechanisation and mobility of the British Army and the ground section of the Royal Air Force.

References

  1. Fletcher, Great Tank Scandal, p. 33.
  2. 1 2 Fletcher & Harley (2006).
  3. Fletcher, Great Tank Scandal, p. 36.
  4. Illustrated Parts List Cavalier 1; Chilwell Ct. No. 62/346
  5. 1 2 "Surviving Centaur and Cromwell Tanks" (PDF), Surviving Panzers website, 8 July 2021, archived from the original (PDF) on 3 April 2022
  6. http://preservedtanks.com/Profile.aspx?UniqueID=2039

Sources