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Leyland L60 gin set with one of the raised radiators on display at Bovington Tank Museum
Chieftain Tank Engine
The Leyland L60 is a 19 liter (1,200 cu in) vertical six-cylinder inverted piston two-stroke multi-fuel diesel engine developed by Leyland Motors for the late 1950s/early 1960s Chieftain main battle tank (MBT) . ). Gin was also used in the Vickers MBT and its Indian-made derivative Vijayanta.
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In 1954, the tank was known at the time as "Medium Gun Tank No. 2", later called "FV4201" and the service name was "Chieftain" Rolls-Royce diesel V8, but during the Chieftain era. . design phase NATO introduced a policy in 1957 requiring all armored fighting vehicles to have multiple fuel capacities.
This made the Rolls-Royce engine an unsuitable option and therefore a new engine with this capability was needed.
Leyland Motors, under the direction of the Combat Vehicles Research and Design Establishment (FVRDE) in Chertsey, was asked to develop an inverted piston two-stroke diesel of a similar design previously produced by Napier.
This configuration has the advantages of simple design, low parts count, low payload and good cold start characteristics, in addition to being suitable for multi-fuel use. Until then, Rolls-Royce, part of the Napier aero-gine company, provided technical support to Leyland, while Napier itself remained a subsidiary of Glish Electric.
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Both Tilling-Steves and Leyland produced single-cylinder prototype racing cars for the Tank Demon project, and by 1959 the full race build was the Leyland 60 or L60, with the first race being run that year.
One of the reasons for choosing the unusual configuration of the L60 was to achieve the most compact powerplant possible, which allows the car to be kept as low as possible, which is a requirement of the Chieftain design philosophy. recumbent driver position.
Using a two-stroke cycle, the 19-liter diesel engine is expected to have the same power output as the 600-horsepower 27-liter gasoline Meteor tank.
At the same time, it takes up less space in the bridle room. The scavenging required on a large two-stroke diesel to evacuate the cylinders of exhaust gases was accomplished by a Roots blower.
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The Chieftain's L60 engine and cooling system was converted into an integrated generator package that could be changed "in the field" using the crane of a custom-built FV434 armored repair vehicle, and a complete one-off generator conversion was performed. half, up to 2 hours.
The requirement for an easily replaceable gin set was a result of the British Army's analysis of earlier tank battles, and future tank engagements would last no longer than two hours, and was therefore the most demanding requirement expected for any breed of tank during the war. . It only works at full power for the total time, and so it's useful to remove it from the vehicle after a fight and replace it with a new demon in a minimal amount of time.
This also allows Ticks to be used in properly equipped REME workshops rather than 'in the field' where gender can be changed between machines and workshops as needed.
Early production L60 units produced 585 hp at 2,100 rpm, down from 600 hp, and suffered from reliability issues. These problems were exacerbated by insufficient reserves at the outset and insufficient reserves of float at the time of the President's introduction.
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The L60's reliability problems would have been worse without the removable genset, which usually allows the car to be restarted with a modified genset within hours of breaking. A constant source of problems was the failure of the cylinder liner seal, which caused coolant to leak into the cylinder bore. Fan drive belts overdrive the fan bearing slots in the crankcase, causing them to crack. Reliability has improved over time with modifications and upgrade programs such as the Sundance program that improved power output. Sundance took place in five main stages from 1976-1979. Prior to Sundance, he was responsible for selecting codenames Dark Morning, High Noon, and Fleetfoot Guinea Pig Development. Western movie fan. The Sundance program was the subject of parliamentary questions in the House of Commons in 1978. With most of the L60's previous reliability and power issues finally resolved, the car's availability has risen to 80%. In the 1990s, the availability levels of the Gulf War Chieftain AARV and CHAVRE surpassed the Challger 1 tank that replaced the Chieftain at the time.
After a series of modifications to the machines in service as part of various modernization programs, the final production tanks produced 750 hp (560 kW).
Initially, trainee drivers were forced to downshift because they were unfamiliar with the different exhaust note and power range of a two-stroke engine compared to a four-stroke engine, and as a result, the correct torque required for a given driving task. ri faced difficulties in selecting a gear. climbing into rows and getting into the wrong gear caused great difficulty, and when the Chieftain Mk 1 was first introduced, some drivers had difficulty fitting the vehicle onto Thornycroft Antar tanker trailers.
In 1975, all British Chieftains were upgraded to Chieftain Mark 5 standard as part of the 'Totem Pole' programme, which involved fitting all cars with the 750bhp L60 Mark 8A. The Chieftain Mk 2 vehicles received the Mark 6 designation in a "totem pole" upgrade. Mk 3 vehicles became Mk 7 and Mk 3/3 vehicles became Mk 8.
Chieftain Prototype 1
A three-way differential epicyclic gearbox providing "regenerative" control, a derivative of the system first used on the Churchill tank. The gearbox was semi-automatic foot and had six forward and two reverse gears. Like Gine, it is designed to be easily replaceable. The TN12 was originally designed for the discontinued FV300 series of light tanks. A smaller version of the TN12 was used in the TN15 CVR(T) series of cars.
This article needs additional citations for validation. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Leyland L60" – news · newspaper · books · scholar · JSTOR (February 2021 ) (Learn how and why to remove this template message)Your bid or registration is pending auctioneer confirmation. Check your email account for more information.
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You are bidding on a Leyland L60 750 HP main tank engine direct from MOD. It was a training aid and was used to train recruits at the REME training base, etc. It may not be complete and may or may not be tested.
It would be ideal as a museum or collector's piece or for use in workshops or technical colleges. Delivered as seen and in used condition..
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