Weight, 134,000 pounds. Length of gun, 528 inches. Weight of projectile,
2,000 pounds. Travel of projectile in bore, 432.4 inches (24.02
calibers). Weight of charge, 310 pounds of smokeless powder. Muzzle
velocity, 2,000-foot seconds. Muzzle energy, 55,500-foot tons. Greatest
diameter of gun, 45 inches. Its breech mechanism was opened and closed
by one man in nine seconds. It was also opened without great effort by a
boy twelve years of age.