Strv 127

Stridsvagn 127 Puma II
Acrean Strv 127A
Type	Main Battle Tank
Place of origin	Acrea
Service history
In service	2023 (Expected)
Production history
Designer	Estocq Systèmes de Défense SARL Landrut Landsystemet GmbH Landsverk AG Kobalt-Zeiss GmbH & Co KG Thyssen AB
Designed	2015-2018
Manufacturer	Estocq Systèmes de Défense SARL Landrut Landsystemet GmbH
Produced	2018-Present
Specifications
Weight	55 tonnes
Length	7.7 metres (hull)
Width	4.0 metres
Height	2.55 metres
Crew	3
Main armament	KvK M181 120mm smoothbore gun
Secondary armament	7.62mm MG 59 Various Top-Mounted 7.62mm and 12.7mm machine guns
Engine	Thyssen MTU MFH1-80A hyperbar diesel 1193,12kw (1600 hp)
Power/weight	20.9 kw/t (28 hp/t)
Transmission	Thyssen ML500 Automatic Transmission
Suspension	Hydropneumatic suspension
Operational range	550 km
Speed	75 km/h (Road) ~55 km/h (Cross-Country)

The Stridsvagn 127 Puma II is a main battle tank developed by Estocq Systèmes de Défense SARL and Landrut Landsystemet GmbH. Primary design work and production was carried out by Estocq SARL, while Landrut provided technical assistance and tooling. Developed from the limited-production Strv 125, the Puma II is being developed as a replacement for the Strv 125, which is currently used by the armed forces of Quenmin.

Design

Armament

Originally equipped with the same M165 smoothbore cannon as the Strv 125, since 2020 the Puma II has been equipped with a modified M181 smoothbore 120mm cannon functionally identical to that used on the Strv 126. It is equipped with similar fitments to the M165, with a larger diameter magnesium sleeve further widened at the base to accommodate for a new recoil system necessary for the M181. Its compressed air fume extraction system has been improved.

The Strv 127 utilises an autloader fitted with an automatic magazine in the turret bustle, a predecessor to the the automatic magazine fitted to Landrut's proposed compact autoloader which is fitted to "V"-variant Strv 124s and the autoloader equipped on the Strv 126. The autoloader is nearly identical to that on Strv 126, retaining the same design but with a slightly smaller magazine containing 34 rounds due to the smaller turret bustle.

Mobility

The Strv 127 utilises a hyperbar system, in which the primary diesel engine's turbocharger is replaced with a gas turbine which acts both as the engine's supercharger, and also being able to function as an auxiliary power unit. Engine exhaust which is redirected to the top of the vehicle is cooled to reduce the thermal signature, and the hull design integrates other materials to reduce the engine's thermal signature.

The suspension system as originally designed technically allows independent control of each road wheel, however this capability was considered unnecessary and so the final design implemented on Strv 127 is a simplified hydropneumatic suspension system akin to the Strv 124's, and simply allows the tank to change the angle of the hull relative to the terrain. Leaning the hull forward or back to gain gun depression and elevation, or tilting the hull on sloped terrain to level the gun were features well-regarded by crews during testing and so this feature taken from the Strv 124's hyrdopneumatic suspension were maintained. Likewise, the overall height of the tank can be adjusted, although the tank is either limited in movement or forced to be stationary when not at standard ride height depending on the attitude. An automatic track tensioning system was tested and implemented on some early prototypes, however added complexity, cost, and maintenance required by this system was not considered efficient and so the same simple tensioning system of the Strv 124 was retained.