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| | RAF History - Bomber Command 60th Anniversary |
 | | When it became clear to Avro's Chief Designer, Roy Chadwick, in 1938 that the new Rolls Royce Vulture engines intended for the Manchester were suffering from a lack of development, the company set about revising the design to include an additional pair of engines, preferably the well-proven Merlin. |
 | | In September 1940, a contract was signed with Avro for two prototype aircraft, the first of which was to fly within four months. |
 | | Throughout the remainder of 1942, the transition to Lancasters in Bomber Command was relatively slow, but the increase in the total tonnage of bombs in operations was increasing rapidly because of the ability of the Lancaster to carry bombs greater than the 4,000lb High Capacity (the only aircraft that could do so). |
| www.raf.mod.uk /bombercommand/lancaster.html (937 words) |
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