buried in the wing itself. Clustering them in a nacelle offered several advantages over individual nacelles, as it reduced overall drag and minimized interference drag, but had the major operational disadvantage that an uncontained fire in one engine could disable its neighbor as well. Early jet engines were not reliable, so this was a significant risk. Ilyushin chose to put the TR-1 engines ahead and below the wing leading edge on short horizontal pylons. This gave them the beneficial effect of acting as anti-flutter weights and proved to be more efficient aerodynamically than underwing nacelles. This also facilitated engine changes and maintenance by making them more accessible to the ground crews. Neither the thin wing nor the engine nacelles offered any place to store the main landing gear so the fuselage was designed as a flattened oval to give them as wide a track as possible. This also provided plenty of room for the of fuel stored in three bags, one each ahead, above and behind the bomb bay. This could carry up to of bombs. The stepless fuselage nose was largely glazed and came to a rounded point (similar to the noses of the Boeing B-29 Superfortress, Heinkel He 111 and Arado Ar 234) to reduce drag. The Il-22 had a crew of five, two pilots in the nose, the bombardier-navigator in front of them in the tip of the nose, the dorsal gunner/radio operator immediately behind the pilots and the rear turret gunner behind the tail. A Nudelman-Suranov NS-23 autocannon with 150 rounds was fixed on the lower starboard side of the nose; it was fired by the pilot who had a primitive ring sight to use for aiming. The dorsal turret mounted two Berezin B-20E guns with 400 rounds per gun and was capable of 360° of traverse, with special microswitches preventing the gunner from firing into the bomber's tail. The turret was remotely controlled by the radio operator and was powered by electric motors for both traverse and elevation. The gunner and his gunsight used a small observation blister at the rear of the main crew compartment to lay the guns on their target. The sight automatically compensated for parallax between the gunner and the turret as well as the required amount of target lead and the shell's ballistics. The remote-control system offered several advantages including a smaller turret that had less drag, the guns could