Mass 1,350 tonnes (1,490 short tons; 1,330 long tons) Length 47.3 metres (155 ft 2 in) Barrel length 32.5 metres (106 ft 8 in) L/40.6 Width 7.1 metres (23 ft 4 in) Height 11.6 metres (38 ft 1 in) Diameter 800 mm Crew 250 to assemble the gun in 3 days (54 hours), 2,500 to lay track and dig embankments. 2 flak battalions to protect the gun from air attack. Shell Armored-Piercing Shell (AP) High-Explosive Shell (HE) Caliber 80 cm (31 in) Elevation Max of 48° Rate of fire 1 round every 30–45 minutes or typically 14 rounds a day Muzzle velocity 820 m/s (2,700 ft/s) (HE) 720 m/s (2,400 ft/s) (AP) Effective firing range c. 39,000 metres (43,000 yd) Maximum firing range 47,000 metres (51,000 yd) (HE) 38,000 metres (42,000 yd) (AP)
