User talk:Author7780

The BT-IS
The T-34 lineage can be traced back to the Christie tank. This tank was associated with the revolutionary suspension system which was the backbone of the Russian light tank industry from 1936. The BT series was upgraded to the extent that the last BT-IS prototype, itself derived from the successful BT-7, was nearly a medium tank rather than a light scout tank. The A-20, the next tank in the line, combined the chassis and suspension of the BT-IS with a new turret and the sloped armor tested on the BT-SV (1936).

A-20, the true T-34 forerunner
The A-20 had a much larger, simpler hull than the previous BT-IS, which retained many features of the Christie tank. This allowed faster manufacturing and a new, slope sided turret was mounted. It was equipped with the standard BT 45 mm (1-77 in) quick firing, antitank and anti-personal gun. The hull was quite heavier, at about 31 tons, compared to the 25 of the BT-IS. Despite of this, it was not better armoured, was slightly slower, but had a greater range and more ammunition. Author7780 (talk) 00:50, 15 April 2023 (UTC)