What is Schwerer Gustav?
{{Infobox Weapon |image= DoraVSScarab.svg |caption= Schwerer Gustav (black) compared to an [[OTR-21 Tochka|SS-21]] SRBM launcher (red) |origin= {{flag|Nazi Germany}} |type=[[Railway gun|Super-Heavy Railway Gun]] <!-- Type selection --> |is_ranged= |is_bladed= |is_explosive= |is_artillery=yes |is_vehicle= |is_missile= |is_UK= <!-- Service history --> |service= 1941–1945 |used_by= [[Wehrmacht]] |wars= [[World War II]] <!-- Production history --> |designer= [[Krupp]] |design_date= 1934 |manufacturer= [[Krupp]] |unit_cost= 7 million [[German Reichsmark|Reichsmark]] |production_date= 1941 |number= 2 |variants= <!-- General specifications --> |spec_label= |weight= {{convert|1,350|t|ST LT|lk=on}} |length={{convert|47.3|m|ftin}} |part_length={{convert|32.5|m|ftin}} L/40.6 |width={{convert|7.1|m|ftin}} |height={{convert|11.6|m|ftin}} |diameter= |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. <!-- Ranged weapon specifications --> |cartridge= |caliber={{convert|800|mm}} |action= |rate= 1 round every 30 to 45 minutes or typically 14 rounds a day |velocity={{convert|820|m/s|ft/s|abbr=on}} (HE)<br>{{convert|720|m/s|ft/s|abbr=on}} (AP) |Muzzle_Energy= 1.734x10^9 Ft/lbs |range= about {{convert|39,000|m|yd}} |max_range={{convert|48,000|m|yd}} (HE)<br />{{convert|38,000|m|yd}} (AP) |feed= |sights= <!-- Artillery specifications --> |breech= |recoil= |carriage= |elevation= Max of 48° |traverse= <!-- Explosive specifications --> |filling= |filling_weight= |detonation= |yield= }} '''Schwerer Gustav''' (English: ''Heavy Gustaf, or Great Gustaf'') and '''Dora''' were the names of two huge [[World War II]] [[Germany|German]] '''80&nbsp;cm K (E)''' [[railway gun|railway]] [[siege gun]]s. The two guns were developed in the late 1930s by [[Krupp]], the famous German arms manufacturer. Their purpose was to destroy heavy fortifications, especially in the French [[Maginot Line]]. The guns weighed nearly 1,350 [[tonnes]], and could fire