The Yakovlev Yak-26, OKB designation Yak-123, was a Soviet tactical supersonic bomber aircraft flown at the Tushino air show on 24 June 1956. The model did not enter service. Design and development The Yak-123-1 prototype was developed from the subsonic Yak-25, and in parallel with the Yak-27 aircraft family, with the main goal of operating at supersonic speed. Although the Yak-123 kept the Yak-25's layout, it had a more streamlined and longer fuselage with a glazed nose for a navigator-bombardier, replacing the Yak-25's radome. The engines were upgraded to the much more powerful RD-9AK afterburning turbojets and the wings modified. The Nudelman N-37 cannon was replaced with two NR-23 23 mm guns. The next prototype, designated Yak-26-3, had a tail barbette with two more such guns, but it was removed altogether after testing. An internal weapons bay was added for of bombs, including the nuclear RDS-4 Tatyana. Additional bombs could be carried on underwing pylons. Engines were upgraded to RD-9F. Although these designs showed potential for a supersonic bomber, they did not feature a radar, limiting their usefulness, and suffered from insufficient stability at high velocities, being prone to aileron reversals. This led to a refinement of the design, resulting in the preproduction-series Yak-26. Although flown at the Tushino air show on 24 June 1956, only ten were produced, and the type did not enter service. Operators Soviet Air Force Specifications (Yak-26) See also References External links Yak-26 at Ugolok Neba (in Russian) Yak-26 from Legion.wplus.net 1950s Soviet bomber aircraft Mid-wing aircraft Twinjets Aircraft first flown in 1956