At the same time, the Faculty of Mechanisation and Motorisation of the Military Technical Academy named after F.E. Dzerzhinsky developed two tank models (TMM-1 and TMM-2) based on the Vickers 6-Ton tank design but with an American Hercules 95 horsepower six-cylinder water-cooled engine, improved front armour (to 15–20 mm), and a driver's position on the left side.