In great secrecy, the design team set up their drawing boards in the old manor, and the Mosquito was lofted in the ballroom. A workshop disguised as a barn was built next door, and the prototype was built and taken by road to Hatfield where it took off on its maiden flight just 11 months after the design had started!
Barnes Wallis invented the aerial mine with which The Lancasters of 617sqn breached the Ruhr dams. What is not so well known is that he also designed a smaller version, two of which were fitted to specially converted Mosquito MK IV bombers of 618sqn.
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