Long-range Escort Fighter
DIS. In the spring of 1945, the design bureau of plant No. 482 began designing a long-range escort fighter (DIS) based on the recently tested Pe-2I dive bomber. Note that both pilots, the pilot and the navigator were in the same cockpit and sat back to back with the possibility of turning the latter.
Armament. A characteristic feature of this aircraft was a very powerful offensive weaponry. In the nose of the fuselage, two (one) B-20 cannons were installed, fixed in a stationary position, and at the bottom of the hull, in a thickening made on the Pe-2I for the suspension of a protruding one-ton bomb, two more cannons of 37 mm caliber, or 45 mm and even two 57 mm guns. For ammunition, respectively, 250 shells, 200 shells and, finally, 175 shells each, it was determined quite enough space in the aircraft body. The mass of a second salvo ranged from 12.3 kg to 17.8 kg. The navigator had one more short-barreled cannon installed on the turret by M.E. Berezina BT-20 for protection from the rear hemisphere.
Construction. All-metal, like all previous "Pawns", especially like the Pe-2I. The innovations were anti-icers on all important components of the aircraft. Due to the tips, the wingspan was slightly increased. The engines were installed in the same places, but with a radically changed cooling system. So, water radiators were placed in the developed wing center section. The oil coolers, along with the air intakes of the carburetors, were spaced out on the outer sides of the engines to the extent limited by the propellers. Engines VK-107 differed from VK-105 in two upper rows of exhaust pipes. Four rows of exhausts were required by the minders due to the extreme increase in the temperature regimes of the VK-107 compared to the VK-105 engine.