Directorate of Miscellaneous Weapons Development - Projects

Projects

DMWD was responsible for a number of devices of varying practicality and success, many of which were based on solid fuel rocket propulsion. As might be expected of a small, dynamic and highly experimental group, their output encompassed both resounding successes and sublimely comical failures, notable among which were the Panjandrum rocket-propelled beach defence demolition weapon and Hajile, a rocket-powered alternative to parachutes for dropping materiel. A scheme to camouflage bodies of water, used as navigation markers by bombers, was undertook by a group named "Kentucky Minstrels". It involved spreading coal dust from a ship, ironically named "HMS Persil". The scheme failed due to the actions of wind and tide but did produce some confusion when the coal-covered waters were mistaken for tarmac in the blackout.

Its successful and important developments included the Hedgehog anti-submarine weapon and Squid anti-submarine mortar, as well as the Harvey Projector, an anti-aircraft rocket battery designed to be mountable on naval vessels and the system of degaussing used to protect ships against magnetic mines, and above all an instrumental role in developing parts of the Mulberry harbour used in the D-Day landings. Hedgehog was developed after the Lt-Col Blacker's spigot mortar weapons were shown to the DMWD by MD1 ("Churchill's Toyshop").

Several experimental weapons were trialled at Brean Down Fort, a satellite unit of HMS Birnbeck in Weston-super-Mare, North Somerset. Some of the better known weapons trialled were the seaborne Bouncing bomb designed specifically to bounce to a target such as across water to avoid torpedo nets, Anti-submarine missile AMUCK and the expendable acoustic emitter (designed to confuse noise seeking torpedoes).


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