"Malka" The 2S7 Pion (GABTU index - object 216) is a Soviet 203 mm high-power self-propelled gun. скачать в хорошем качестве

"Malka" The 2S7 Pion (GABTU index - object 216) is a Soviet 203 mm high-power self-propelled gun.

The 2S7 Pion (GABTU index - object 216) is a Soviet 203 mm high-power self-propelled gun. It was developed at the Kirov Plant in Leningrad. The chief designer of the chassis was Nikolai Popov, the 203 mm 2A44 rifled gun was Georgy Sergeev. 2S7 "Pion" is designed to suppress rear, destroy critical facilities and nuclear attack facilities in tactical depth at a distance of up to 47 km. After modernization received a new index 2S7M "Malka" (upgraded chassis - 216M with a diesel V-84B, guidance and loader systems), in the literature meets the name "Pion-M". The main armament is the 203 mm 2A44 gun with a maximum rate of fire of 1.5 rounds per minute (up to 2.5 rounds per minute on the upgraded version). The barrel of the gun is a loose tube connected to the breech block. In the breech casing there is a piston bolt. The barrel and the recoilers are housed in the cradle of the swinging part. The swinging part is fixed to the upper machine, which is mounted on an axle and secured with bows. The recoil prevention devices consist of a hydraulic recoil brake and two pneumatic rammers, positioned symmetrically in relation to the barrel's channel. This arrangement makes it possible to hold reliably the recoil parts of the gun in an extreme position until the shot is fired at any angle of vertical aiming. The recoil length at the firing range is up to 1400 mm. The sector type elevating and swiveling mechanisms provide pointing within the range from 0° to +60° vertically and from -15° to +15° horizontally. The pointing can be carried out either by hydraulic actuators fed from the pumping station of the ACS 2S7 or by means of manual actuators. The pneumatic balancing mechanism is used to compensate the moment of unbalance of the gun's swinging part. To facilitate the work of the crew members the SAU is equipped with the charging mechanism which ensures the supply of rounds to the loading line and their delivery to the gun's chamber The hinged baseplate at the stern of the hull transmits the shot forces to the ground providing the SAU with more stability. At the No.3 charge the "Pion" could direct fire without a bipod. The transported ammunition of the Pion variant is 4 rounds (8 for the upgraded version), the main ammunition of 40 rounds is carried in the transport vehicle attached to the SAU. The main ammunition includes 3OF43 high-explosive shells, as well as 3O-14 cluster rounds, concrete and nuclear ammunition. Additionally the 2S7 SAU is equipped with a 12.7 mm NSVT machine gun and 9K32 "Strela-2" man-portable anti-aircraft missile systems. The undercarriage of the 2S7 is based on the T-80 main tank and consists of seven pairs of twin rubber track rollers and six pairs of single track rollers. There are guide wheels in the rear of the vehicle and drive wheels in the front. In the firing position the guide wheels are lowered to the ground to give the SAU greater resistance to firing loads. Lowering and raising is done with the help of two hydraulic cylinders attached to the wheels' axles. Suspension 2S7 - individual torsion with hydraulic shock absorbers Preparation of the firing position was carried out with the help of the opener at the rear of the SAU. Two hydraulic jacks were used to raise and lower the opener. In addition, the 2S7 gun was equipped with a 24 hp diesel generator 9R4-6U2. The diesel generator was designed to run the main pump of the SAU hydraulic system while the machine was stationary, when the engine was turned off.