Antonov An-12 Cub Crashed And Abandoned

• An-12RU
A projected JATO (Jet-Assisted Take-Off) version of the An-12, to be fitted with two jettisonable PRD-63 solid-propellant rocket boosters fitted either side of the aft fuselage.
• An-12SN
(Spetsiahl'novo Naznacheniya – special-mission) To enable the Soviet Army's T-54 main battle tank to be airlifted, Antonov designed the An-12SN with a cargo hold increased in width from 3m (9ft10in) to 3.45 m (11 ft), powered by 5,180ehp AI-20DK engines boosted by a 3,800 kg thrust (8,380lbst) Mikulin RD-9 turbojet installed at the base of the fin in place of the gunners station. The Antonov An-22 was found to be more suitable for carrying the tank so further work on the An-12SN was abandoned.