最大口徑的火砲
800mm 火車砲
http://homepage3.nifty.com/tompei/favorite_ground.htm 80cm列車砲 - Wikipedia
https://www.youtube.com/watch?v=fyFKbLGGCVY&hd=1https://www.youtube.com/watch?v=Hf3fgfHoTOchttp://highpowerrocketry.blogspot.tw/2011/06/schwerer-gustav-and-dora-railway-siege.htmlSpecifications:
Weight 1,350 tonnes
Length 47.3 metres
Barrel length 32.5 metres (106 ft 8 in)
Width 7.1 metres (23 ft 4 in)
Height 11.6 metres (38 ft 1 in)
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
Caliber 800 millimetres (31 in)
Elevation Max of 48°
Rate of fire 1 round every 30 to 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 range about 39,000 metres (43,000 yd)
Maximum range 48,000 metres (52,000 yd) (HE) 38,000 metres (42,000 yd) (AP)
Schwerer Gustav
古斯塔夫超重型鐵道炮
https://en.wikipedia.org/wiki/Schwerer_Gustav