Slovakia’s Joint-Stock Company Konstrukta Defence has showcased the new 8×8 variant of its Eva 155/52 mm calibre self-propelled gun-howitzer, which is also known by its export designation of Truck Mounted Gun (TMG).
The latest 8×8 TMG – which is jointly developed by Konstrukta Defence and Czech firms Czechoslovak Group (CSG) and Tatra Trucks from 2017 – is a redesign of the previous 6×6 TMG which was unveiled in 2015.
The vehicle measures 11.5 m long, 2.7 m wide, and 3.28 m tall with the ordnance stowed for transport. The 28-tonne vehicle, which is air-transportable by large tactical airlifters such as the Airbus A400M and Ilyushin IL-76, is operated by a crew of three. It preserves the gun assembly and ordnance fitted to the 6×6 TMG, but adopts a longer 8×8 chassis which is equipped with an auxiliary power unit (APU) as well as a newly designed armoured cab.
The new variant is based on the four-axle Tatra T815-7 8×8.1R and powered by the Euro 3-compliant Tatra T3C-928.90 turbo-charged air-cooled diesel engine with a maximum power output 300 kW at 1,800 rpm, which the company claims to offer improved mobility in challenging terrain.
Field endurance has been improved with a 30 kW APU unit based on the Lombardini 11LD626-3 engine. Half of the power generated by the APU is used for hydraulic system while the remainder powers the ordnance charges the vehicle’s accumulator batteries.
The 155/52 mm calibre ordnance has a 23-litre chamber and can be elevated from -3.5° to +75° and traversed ±60° in the azimuth. The ordnance generates a muzzle velocity of 935 m/s and can achieve a maximum firing range of 41.4 km with high-explosive extended range base-bleed (HE ER-BB) ammunition. It can also fire most NATO-standard 155 mm ammunition that are up to 1,000 mm long.
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