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DD or duplex drive tanks, nicknamed "Donald Duck tanks", [1] were a type of amphibious swimming tank developed by the British during the Second World War.The phrase is mostly used for the Duplex Drive variant of the M4 Sherman medium tank, that was used by the Western Allies during and after the Normandy Landings in June 1944.
A Sherman DD amphibious tank of 13th/18th Royal Hussars in action against German troops using crashed Airspeed Horsa gliders as cover near Ranville, Operation Overlord, Normandy, 10 June 1944 As the United States approached entry into World War II, armored employment was doctrinally governed by Field Manual 100–5, Operations (published May ...
In preparation for the invasion of Europe by Allied forces in 1944, an amphibious "swimming" version of the Sherman was used. Extensive work on creating mine-clearance devices to be attached to Shermans in some fashion was also conducted up until the end of the Second World War, such as the Sherman Crab mine-flail tank.
Crab: A modified Sherman tank equipped with a mine flail, a rotating cylinder of weighted chains that exploded mines in the path of the tank. DD tank (from "Duplex Drive"): An amphibious version of the Sherman created by fitting M4A1 and M4A4 with a large watertight canvas housing. This increased displacement so the tank was able to float and ...
The "Medium Tank A/T 1" was a tank with inbuilt buoyancy some 24 ft (7.3 m) long and 11 ft (3.4 m) tall. The Valentine, then the M4 Sherman medium tank were made amphibious with the addition of a rubberized canvas screen to provide additional buoyancy and propellers driven by the main
Bomb is a preserved M4 Sherman tank. It was used by the Canadian Army 27th Armoured Regiment (The Sherbrooke Fusilier Regiment) which landed in France on 6 June and fought across northwest Europe until the end of World War II.
A Canadian LST off-loads an M4 Sherman during the Allied invasion of Sicily in 1943.. A Landing Ship, Tank (LST) is a ship first developed during World War II (1939–1945) to support amphibious operations by carrying tanks, vehicles, cargo, and landing troops directly onto a low-slope beach with no docks or piers.
Tall ducts extended from the engine deck to above the turret top and they needed to stay above water. The front duct was the air intake for the engine and crew compartment, the rear duct vented the exhaust. This device saw use in many amphibious operations, it was also used on light tanks and tank destroyers. The US had similar devices for ...