Tupolev ANT-30
In 1933–1934, the VVS announced a requirement for a 2-engine multirole aircraft of the 'air cruiser' class, building upon the concepts incorporated in the R-6 and MI-3.According to the draft, the ANT-30 was to be carried out according to the scheme of an all-metal twin-engine aircraft with a smooth skin and normal tail.When considering possible projects, special attention was paid to the effectiveness of offensive and defensive small arms and cannon weapons.A firing point with two ShKAS machine guns was located in the anterior ascending domed installation; In the fuselage cargo compartment in the "cruiser" version, there was an additional fuel tank; The total bomb load reached 1000 kg.But all the works were gradually curtailed at the end of 1933 - at the beginning of 1934, at this point the technical readiness of the ANT-30 was estimated at 16%.