Originally posted by yuppy4life:
I believe you are talking about Dora.
Only 1 was made and fired only 40 times before captured by the
russians.

Caliber: 800 mm
Weight of the projectile: 4 800.0 kg
Muzzle velocity: 820 meters per second
Range: 46 980 meters
ONE projectile weighs 4.8 tons?
Ouch. 