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| | The Royal Air Force - History Section (Site not responding. Last check: 2007-10-29) |
 | | Avro's chief designer, Roy Chadwick, designer of the Manchester, Lancaster and Lincoln bombers, started work even before issue of B14/46, when it was realised the a jet powered bomber would be needed. |
 | | The Vulcan in its initial form was powered by four Avon R.A.3 engines of only 6,500lbs thrust, as the planned Bristol Olympus engines of 9,750lbs were not ready. |
 | | Vulcans entered service with No.230 OCU at Waddington on 20 Jul 1956, and the first squadron, No.83, was declared operational on 11 Jul 1957. |
| www.raf.mod.uk /history/vforce3.html (600 words) |
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