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Aviation of World War II |
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Tu-2PExperimental AircraftTupolev![]()
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By the summer of 1948, OKBL-46 of the Ministry of Armaments under the leadership of E.V. Charnko, the Ch-21P automatic aircraft gun of 57/76 mm caliber was created. To test it, the Tu-2 bomber base in OKB-30 A.P. Golubkov created an experimental aircraft for the installation of two such guns. The aircraft, designated Tu-2P, was intended to determine the effectiveness of the use of this weapon when firing at air and ground targets, as well as the behavior of the machine in the air. Cannons with electro-pneumatic control of firing and reloading were installed parallel to the building horizontal of the fuselage. In this case, the barrels of the guns passed under the floor of the front cockpit. For shooting, they provided an ASP-1N sight, fixed on a telescopic rod. The muzzle velocity of the cannon projectile, depending on the caliber (57 or 76 mm), was 1087 or 920 m / s, respectively, with a high-explosive fragmentation projectile (OFZT) weighing 2.485 and 4.735 kg. Rate of fire ≈ 80 and 70 rounds per minute, respectively. The cartridges weighed 6.5 and 9 kg, respectively. The ammunition load of the guns did not exceed 15 rounds per barrel.
Factory flight tests of the Tu-2P took place from January 18, 1949 and continued until the end of September 1949 and did not reveal any anomalies in the aircraft's behavior. Tests showed no deformation of the airframe after firing. The Tu-2P was approved for state tests in early December 1949, while the main gun 4-21P remained in prototypes. Bibliography![]()
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