She is The T-10 was a Soviet heavy tank prototype developed in the 1950s. Here are its key features: *Design and Specifications* 1. *Weight*: approximately 50 tons 2. *Length*: 9.87 meters (32.4 feet) 3. *Width*: 3.67 meters (12 feet) 4. *Height*: 2.41 meters (7.9 feet) 5. *Crew*: 4 (commander, gunner, loader, driver) 6. *Armor*: 120-150 mm thick 7. *Main armament*: 122mm D-25TA cannon 8. *Secondary armament*: 2 x 14.5mm KPVT machine guns, 1 x 12.7mm DShK machine gun 9. *Engine*: V-12 diesel, 700 horsepower 10. *Top speed*: 48 km/h (30 mph) *Development and History* 1. *Development began*: 1951 2. *First prototype*: 1953 3. *Testing*: 1953-1957 4. *Production*: Cancelled due to technical issues and shifting Soviet tank doctrine 5. *Replacement*: T-55 and T-62 tanks *Variants* 1. T-10 (original prototype) 2. T-10A (improved variant with enhanced armor) 3. T-10B (upgraded variant with improved firepower) The T-10's development was plagued by technical issues, and it never entered mass production. However, its design influenced later Soviet heavy tank projects.