These guns were 66 feet (20 m) long—50 times their 16-inch (410 mm) bore, or 50 calibers, from breechface to muzzle. Each gun weighed about 239,000 pounds (108,000 kg) without the breech, or 267,900 pounds (121,517 kg) with the breech.[1] They fired projectiles weighing from 1,900 to 2,700 pounds (850 to 1,200 kg) at a maximum speed of 2,690 feet per second (820 m/s) with a range of up to 24 miles (39 km). At maximum range the projectile spent almost 1½ minutes in flight.[1] Each turret required a crew of 94 men to operate.[1] Each turret cost US$1.4 million, but this figure did not take into account the cost of the guns themselves.[1]