Editing Blockbuster bomb (section)

===2,000 lb HC===
Design of a 2,000 lb to meet requirements of similar size to existing 1900 lb GP bomb was by Vickers with parachute arrangements by the RAF; this was at the same time Woolwich was designing the 4000 lb bomb. Actual case construction was by Great Western Railway Company. Live tests began at start of 1941; a few were used operationally in late 1941 with parachute dropping and delay timer. The parachute requirement was dropped and from early 1942 they were used with conventional tail. Improved Mark II and Mark III (with different fuse positions) followed in 1943. Actual weight was {{convert|1,723|lb|abbr=on}} for Mark II and III with 71% charge to weight filling of 60/40 or 50/50 Amatol, RDX/TNT 60/40, or Torpex 2.<ref name=Boyd2000>{{cite web |url=http://www.wwiiequipment.com/index.php?option=com_content&view=article&id=106:2000lb-high-capacity-bomb&catid=43:bombs&Itemid=60 |title=2,000lb High Capacity Bomb |last=Boyd |first=David |work=WWII Equipment |access-date=21 February 2021 |date=1 January 2009 }}</ref>