The Polikarpov Ivanov was a 1930s prototype Soviet ground attack monoplane designed by Polikarpov for a soviet government procurement competition codenamed Ivanov.
[1] The Ivanov was an all-metal low-wing monoplane with a retractable conventional landing gear and powered by a 830 hp (619 kW) Shevtsov M-62 radial engine.
[1] It was fitted with four wing-mounted ShKAS machine guns with a moveable turret-mounted Berezin UBT fitted at the rear of the cockpit area.
The Ivanov was found to need better flying qualities and with the competing Kharkov R-10 already in production the second prototype was not completed and the programme was abandoned.
[1] Data from The Osprey Encyclopedia of Russian Aircraft 1875–1995[2]General characteristics Performance Armament