Ilyushin Il - 30 The Ilyushin Il - 30 was a Soviet turbojet - powered tactical bomber designed as a higher - performance , swept wing version of the Ilyushin Il - 28 in the late 1940s . Its thin wing and engine nacelles necessitated the use of tandem landing gear , the first Soviet aircraft to do so . It was apparently canceled before the prototype made its first flight , although sources disagree on this . Development . The Il - 30 was a follow - on to the Il - 28 , although design began on 21 June 1948 , before the Il - 28 had flown . It was designed to meet a requirement for a jet bomber that could carry to a range of with a maximum speed no less than . The design took that of the Il - 28 as a starting point , but had thin , mid - mounted swept wings with a 35° sweep angle chosen to allow the aircraft to reach its required speed . It was intended to be powered by two new Lyulka TR - 3 axial - flow turbojet engines with 45 . 1 kN ( 10 , 140 lbf ) thrust each in wing - mounted nacelles . Both the fuselage and the nacelles were area ruled . The thin wing and the 2° anhedral necessary to cure the excessive lateral stability meant limited the amount of fuel that could be carried and tip tanks were required to meet the range requirement . The slim engine nacelles did not allow the main landing gear to be stowed there as was done in the Il - 28 . The solution was to house them within the fuselage — the first bicycle landing gear on a Soviet aircraft — with small , twin - wheeled , outriggers mounted underneath the nacelles to stabilize the aircraft on the ground . The aircraft had a crew of four , the pilot , a bombardier , and two gunners . The pilot , bombardier and the dorsal gunner shared one pressurized compartment that was subdivided into the cockpit and the bombardier ' s position in the extensively glazed nose . The dorsal gunner was placed back - to - back with the pilot underneath the canopy and the tail gunner had his own separate pressurized compartment at the rear of the aircraft . Defensive armament was six Nudelman - Rikhter NR - 23 cannon , two fixed forward and one pair each in the Il - V - 12 dorsal turret immediately behind the cockpit and the Il - K6 tail turret . Maximum bomb load was The initial results were favorable , and a full - scale mockup was formally reviewed in March 1949 . The prototype was completed by August 1949 , but an incident involving the rival swept - wing Tupolev Tu - 82 that broke an engine mount during a low - altitude flight led to delays as additional tests were demanded to determine the strength of the wings before the first flight was made . By the following year , the Il - 30 program had lost momentum as the Ilyushin OKB was ordered to concentrate its resources on facilitating the service introduction of the Il - 28 . It was formally terminated by government order on 20 August 1950 , and the prototype was eventually scrapped at the beginning of the 1960s . Aviation historian Bill Gunston quotes a maiden flight date of 9 September 1949 , but Vaclav Nemecek says 1951 . Although the Il - 30 never actually flew , it was the subject of much ( misinformed ) speculation in the West . Some of the common misconceptions were that it had a ventral gun mount and that it was the first Soviet bomber to attain the speed of .