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152mm ShKH Dana vz.77
155mm ShKH Zuzana

The 152mm self-propelled gun/howitzer (model 77) is a self-propelled cannon howitzer on a Tatra T-815 truck chassis. It is a modern artillery weapon with automatic loading, capable of providing efficient fire support for ground forces´ activities. It is characterized by long range, high precision and high rate of fire. It is intended for fighting enemy artillery and mortars, suppression and destruction of enemy command posts, firing positions, radio equipment and manpower, destruction of both permanent defence structures and field entrenchments. It can carry out both direct (in case of need circular) and indirect fire. The howitzer is fitted with a 152mm gun, 12.7mm anti-aircraft machine-gun (model 38/46) and a RPG-7 anti-tank rocket launcher.

The Dana was developed in the late 1970s by ZTS for the Czechoslovak army, instead of purchasing the Soviet 2S3 Akatsiya. It is based on the Tatra 815 (8x8) truck, and was accepted for service in 1981. By 1994, over 750 units had been produced. Currently the vehicle is marketed by ZTS of the Slovak Republic. Further developments include a 155 mm gun, and the installation of the 155 mm gun turret on a T-72 chassis. The Dana is currently in service with the Czech Republic, Libya, Poland, Russia, and Slovakia.

The driver and commander are seated in the front cabin. The turret consists of two halves, with the gun mounted in between. Turret traverse is limited to 225 degrees to either side, due to cables. The gun has a fully automated loading system; after firing a moving belt removes the cartridge case. All the optics are located in the left half of the turret. The gunner and loader operator are on the left, the ammo handler is on the right side, which also has a DhSK on the turret roof. There are 60 projectiles in the turret and chassis.

The Zuzana 155mm Self Propelled Gun Howitzer is artillery gun for using of 155 mm ammunition, which is part of equipment of NATO states. Because of the long gun-range, cadence, accuracy fire, mechanization of service operations, system of fire control and manoeuvrability this Howitzer comes under group of the most modern guns in the world. This gun is intended for demolition of tactical, explorational and firing instruments of enemy, for destruction of constant and field defence works, tanks and another armed targets by direct fire or by blind fire. The Howitzer is equipped by system of fire control, connecting mechanism, cross-country navigation and wherewithalls for calculation of ballistics and diagnostics.

The Slovak Army currently possesses 16 Zuzana howitzers - 155mm, model 2000 - and plans to acquire more by 2010. First adopted by the Slovak Army in 1998, the weapon now employs powerful shells made by the Konstructa DEFENCE a.s. of Trencin.

Tactical and technical data for 155 mm Self Propelled Gun Howitzer ZUZANA

Provided that all operational requirements are met, the assembled 155 mm SpGH will provide the reliable operation in the following conditions:
- within the temperature limits from -30oC up to +50oC
- at the relative humidity of 98% at 25oC
- at the precipitation intensity of 300 mm.h-1
- at the dust (sand) weight concentration of 2 g.m-3
- at the vehicle inclination up to 5 deg. At any direction



BALLISTIC DATA:

Barrel:
Calibre: 155 mm
Length: 45 calibres

Projectiles:
Type: M107, ERFB-BT, ERFB-BB
Shell mass - with generator (ERFB-BB): 48.0 kg
- with no generator (ERFB-BT): 45,5 kg
- M107: 43,1 kg
Powder charge mass (maximum): 17,5 kg

Shell muzzle velocity (with maximum charge) at 15°C/50°C: 890/930 mps
Maximum all-burnt pressure (with maximum charge) at 15°C/50°C: 330/380 MPa
All-burnt pressure at the muzzle at -30°C: 93 MPa
Path of projectile: 5,946 mm
Range of fire:
- Maximum range of fire for M107/ERFB-BT/ERFB-BB 17,5/30,7/39,0 km
- Maximum range of fire (elevation 70°, charge no. 4M4A2, shell ERFB-BT): 5,3 km
Power at the muzzle at +50°C: 20,5 MJ
Charge compartment capacity with ERFB-BT: 23,64 dm3
Barrel bore cross section: 19,240 mm2



VEHICLE DATA

Chassis type: TATRA 815 VP31 29 275 8x8.1R-T with rear-mounted engine and maximum power output of 1330 Nm

Engine type: TATRA 3-930.52 supercharged, Diesel, four-stroke, multi-fuel, 12-cylinder engine with direct fuel injection

Engine lubrication system: Forced lubrication by gear pumps with oil tank on the engine
Engine cooling system: Air cooling
Mean outer turning circle diameter: 26,0 m

Axles:
- Number of axles: 4
- Wheel base: 1,650/3, 070/1,450 mm
- Ground clearance: 400 mm

Wheels:
Type and dimensions: 15-21 MP914 (T04)
Number of wheels: 8
Wheel track: 2,044/1,984 mm

Range of inflation in course of running for 40 shells carried: 150 through 525 kPa

Operational pressure of the air system: 710 through 760 kPa

Maximum travel speed on asphalt or concrete ground
At the overpressure in tyres of 525 kPa: 80 kmph

Basic fuel consumption: 65 litres per 100 km

Distance covered at basic fuel consumption (range of action): 750 km

Climbing ability: 58% (30°) maximum

Maximum fording depth (incl. fording wave): 1,4 m

Trench crossing ability: 2 m

Fuel type: Diesel oil acc.to STN 65 6506


Power supplying system:
The device is fed from power sources of the T 815 chassis.

Supplying voltage: 27 V +10%/-20%

Turret cabins: armoured with overpressure, air-conditioned

Firing height: 2,406 mm

Recoil length, maximum: 1,170 mm

Range:
- Maximum elevation with 40 pcs of ammo and supporting blocks shifted out: 70°
- Minimum elevation (depression) with 40 pcs of ammo and supporting blocks shifted out: -3°30´
- Azimuth: ±60°

Motor-assisted laying speed:
- Maximum rate of elevation: 64 mils per second
- Maximum rate of traverse: 85 mils per second
- Minimum rate of elevation: 4 mils per second
- Minimum rate of traverse: 4 mils per second

Loading: automatic mode by means of loading device and manual mode

Rate of fire:
- in automatic mode: 5 to 6 round in the 1st minute, 30 rounds in 6 minutes
- in manual mode: 1 round in 2 minutes

Number of shells carried: 40

Crew incl. driver: 4 crewmen

General dimensions:
- Maximum length: 12,970 mm
- Maximum height up to the turret ceiling: 3,010 mm
- Maximum height, incl. the machine-gun *): 3,530 mm
- Maximum width: 3,200 mm
*) Applicable for version supplied the Slovak Army

Weight:
- Barrel assy: 2,860 kg
- Elevation masses: 3,850 kg
- Traverse masses (incl. accessories and armament): 12,250 kg
- Chassis (incl. fuel, fluids, armament and accessories): 16,350 kg
- Total weight of 155 mm SpGH (incl. fuel, fluids, armament and accessories and 40 pcs of shells carried, without crewmen): 29,000 kg

152mm ShKH Dana

155mm ShKH Zuzana