This armored ground attack aircraft was presented at State Trials in 1948, as a heavier 'supplement' type to the IL-10 (already in service) and IL-10M (ready for production). IL-20 differed from any other aircraft built before by its pilot's cockpit, located above the engine at extreme nose and provided unrestricted forward view. Engine and pilot's cockpit had common armour 'shell'. Landing gear (including the tail wheel) - retractable.
Four vertically movable 23mm NS-23 cannons were installed in the wing out of propeller arc. IL-20 could carry 1190kg of bombs on external hardpoints (up to 500kg each) and unguided RS family rockets.
Gunner-operator occupied separate cockpit. He operated a remotely-controlled turret with single NS-23 cannon. Defensive weapons included DAG-10 dispenser for 10 aircraft grenades AG-2.
Flight tests proved good performance of the aircraft (similar to those of lighter IL-10M, thanks to more powerful engine). But age of piston engine aircraft was fading, and IL-20 was not accepted for series production.
Specification
ENGINE 1 x AM-47F, 2700kW
WEIGHTS
Take-off weight 9820 kg 21650 lb
Empty weight 7500 kg 16535 lb
DIMENSIONS
Wingspan 17.0 m 56 ft 9 in
Length 12.59 m 41 ft 4 in
Wing area 44.0 m2 473.61 sq ft
PERFORMANCE
Max. speed 515 km/h 320 mph
Ceiling 7750 m 25450 ft
Range 1180 km 733 miles
ARMAMENT 3-5 x 23mm cannon, 1190kg of bombs
Shows sight view during attack compaired to IL-2/-10
All info taken from aviastar.org