_tank.jpg){kind=link}
Overview and variants
The Tank, Mark V was a major 1918 development of the British heavy tank. It retained the rhomboidal tracks and side-sponson weapons of its predecessors, but its Ricardo engine and Wilson epicyclic steering represented a more consequential change than the familiar exterior suggests. The vehicle entered combat during the final year of the First World War and continued in several postwar settings. Sources
The family requires precise names. A base Mark V, a stretched Mark V* and a further-developed Mark V** are not interchangeable subjects, even when a short caption drops the stars. Male and Female identify principal weapon configurations, while Composite or Hermaphrodite refers to a mixed arrangement. A named individual vehicle is not automatically another manufacturing variant. Sources
The account covers the wider family, but its base-tank figures are separate from the specifications and production of the stretched designs. The same principle applies to captured vehicles, later conversions and restored museum examples. Sources
Development and manufacturing transition
Earlier British heavy tanks imposed a complicated division of work on the people steering them. Improving that arrangement was a central development problem, alongside the demand for more power and better reliability. The Mark V combined a more powerful Ricardo engine with Wilson's epicyclic system so that the driver could control the tank without the same multi-person steering procedure required by the earlier arrangement. Sources
Accounts place the first factory completion at Metropolitan in Birmingham on 18 January 1918 and records the arrival of vehicles with the 8th Battalion during the spring. These dates concern production and issue, not the first use of a prototype or the first battle; each milestone needs its own label. Sources
The stretched Mark V* emerged in response to a further requirement for crossing wider trenches. It was not merely a nickname for any Mark V carrying infantry. Its longer body and associated weight changed the vehicle's mobility and internal arrangement. The Mark V** represents another development step, and its projected or reported technical changes cannot be silently applied backward to either the base tank or the first stretched version. Sources
Engine, steering, and crew work
The Ricardo installation is commonly rated at 150 horsepower in the cited sources. The Wilson transmission reduced the human coordination needed to turn the vehicle, but it did not turn the Mark V into an easy or comfortable machine. Operating a heavy tracked hull across broken ground still demanded attention to speed, steering, engine condition and the terrain ahead. Sources
The crew continued to share a hot and noisy fighting space with machinery. Ventilation difficulties and fumes remained significant, and attempts to improve airflow introduced trade-offs in exposure and protection. Sources
Representative base-tank figures include a crew of eight, speeds around 4.6–5 mph and a quoted range around forty-five miles, subject to source and conditions. Published maximum armor figures also differ. These values are retained as qualified research data rather than combined into a single artificially precise performance standard. Sources
Armament and configuration
The Male arrangement used a 6-pounder gun in each side sponson, with machine guns supplementing the cannon. The Female arrangement substituted machine-gun armament for those guns. This division reflected different expected targets: the gun tanks could attack harder points that machine-gun-only vehicles could not effectively engage. Sources
A Composite or Hermaphrodite carried different sponson types on its two sides. Its identity cannot be established reliably from a photograph showing only one side unless the individual vehicle or configuration is independently documented. Conversions to this arrangement also does not add to the new-build total as though they were another production run. Sources
Observation arrangements and weapon ports likewise need to be described separately; the existence of an opening does not prove that a specific gun was installed in the photograph or at every stage of service. Sources
The stretched tanks and production accounting
The Mark V* lengthened the tank by approximately six feet to improve its ability to cross broad trenches. The added volume also encouraged carriage of infantry, but Published accounts describe the severe physical conditions those passengers encountered. Extra internal space did not eliminate heat or fumes, and a troop-carrying opportunity is distinct from the purpose-built protection and accommodation of a mature personnel carrier. Sources
The longer vehicle retained the same basic engine class and paid for its increased reach with weight and handling penalties. Sources
The account commonly gives four hundred base Mark V tanks, divided between Male and Female, and distinguishes a seven-hundred-vehicle Mark V* order from 645 completions. It also retains a much smaller Mark V** completion figure with weaker certainty. These are different accounting statements. Conversions, vehicles transferred abroad and tanks appearing later in museums are not additional production merely because another record describes them. Sources
Combat and postwar service
At Hamel on 4 July 1918 the Mark V operated within a coordinated attack rather than as an isolated mechanical solution. Accounts associate the operation with sixty Mark V fighting tanks and four supply vehicles, retaining the distinction between fighting and supporting machines. Its discussion of losses also separates temporary disablement from permanent destruction. Sources
The Mark V and stretched forms then participated in the August offensives and subsequent fighting. Amiens is central to the family history, but the strength returns for different formations and marks cannot be combined into one homogeneous fleet. American 301st Heavy Tank Battalion service and more uncertain references to French use likewise need to identify the actual type and configuration. Sources
After the war, British tanks passed through changing ownership and service settings, including the conflicts in Russia. Transfers, captures and reuse could leave the same vehicle represented under multiple operator records. Changes of operator or unit markings did not constitute additional manufacture. Some national and unit totals remain unresolved. Sources
Survivors, photographs, and significance
The Mark V's significance lies partly in a less visible part of tank design: control. A machine that required fewer people to coordinate steering could make better use of its crew, even though severe environmental and mechanical limitations persisted. This places the transmission beside armor and weapons as an essential part of its historical story. Sources
The image collection spans service photographs, disabled vehicles, stretched tanks and a modern museum exhibit. These are not interchangeable illustrations. Sources
The surviving base and stretched vehicles can support detailed configuration comparisons only when their identities and modifications are established. Sources
Photographs and image credits
Background reading and references. Each photograph has its own source and credit.
_%E2%80%989199_-_H41%E2%80%99_(36197628610).jpg){kind=link}
Sources and further reading
Background reading and references. Each photograph has its own source and credit.
- The Tank Museum, "Mark V" — Development date, Ricardo engine, Wilson steering, production total, speed/range/armor notes, crew conditions
- The Tank Museum, "Mark V" collection page — Vehicle H41 data, production total, weapon, speed, armor, service notes
- The Tank Museum, "The Mark V* Tank" — Mark V* lengthening, trench-crossing rationale, order/completion totals, troop-carrying experiments
- Australian War Memorial, "The Battle of Hamel" — Hamel planning and Mark V first
- Australian War Memorial, collection record RELAWM15132 — Monash presentation model and 5th Tank Brigade commemorative context
- Imperial War Museums, "Amiens 1918" — Amiens operational context and tank role
- Imperial War Museums, object 73, "A Mark V Male Tank" — Non-embedded image lead and collection
- The Army Historical Foundation, "The Dawn of American Armor" — U.S. 301st Tank Battalion and late-war U.S. heavy tank context