155 mm 52 cal. TMG EVA is an artillery weapon system with automatic loading system, capable to provide effective fire by direct or indirect targeting. During the development course a special care has been taken to apply the maximum heritage portion of well proven subassemblies of ZUZANA 2 version.
155 mm TMG EVA is characterized by high mobility as it is a lighter version of the howitzer. Its other characteristics are the protection of the crew against infantry weapons, far-distant range of fire, quick preparation and high accuracy of fire, a rapid transition from the marching position to the firing position and also the ability to carry out multiple round simultaneous impact – the firing by salvo mode of fire – MRSI.
Three-man crew is located in an air-conditioned driver’s cabin. Backup workplace is situated on the weapon superstructure. Driver´s cabin is light armoured. For action in contaminated area, the cabin is equipped by effective filtration and ventilation unit. The cabin protects the crew against NBC weapons, small arms, as well as mounted weapons and ammunition fragments.
The weapon superstructure is equipped with automatic loading mechanism with conveyers of 12 pieces of projectiles and 12 pieces of charges, feeders and loading system – allowing the MRSI fire, 5 rounds in the first minute and 9 rounds in 2 minutes. For firing ammunition stored in conveyors is not necessary to get out of the cabin, all the activity is controlled by the commander from the chassis cabin. Another 12 projectiles and 12 powder charges are carried there in hermetical packing on the truck chassis.
EVA chassis 8×8 or alternatively 6×6 – the TATRA concept featuring the middle support tube with swinging half-axle and the engine in the front part. The chassis features the armoured cabin and the central tire inflation or deflation.
The automation is arranged by using the mechanisms sensing and auto-adjusting the position of barrel and ammunition conveyers, fully automatic loading system, automation of data transfer between the master system and object.
The main principe of the FCS software is the central management of technical resources and monitoring of their activities. Other features of the software result from the fact that the tasks for which the input data are collected on the cannon must be solved directly in the on-board computer. These are mainly tasks of topographic, ballistic and technical training, but mainly the calculation of elements of shooting.