Volkswagen Schwimmwagen

The Schwimmwagen used the engine and mechanicals of the VW Type 86 four-wheel drive prototype of the Kübelwagen, also used for the Type 87 four-wheel drive 'Kübel/KDF' Command Car (Kommandeurswagen), which in turn were based on those of the civilian KDF-Wagen. Erwin Komenda, Ferdinand Porsche's first car-body designer, was forced to develop an all-new unitized bodytub structure, since the flat floorpan chassis of the existing VW vehicles was unsuited to smooth movement through water. Komenda patented his ideas for the swimming car at the German Patent office.

The initial Schwimmwagen, Type 128 prototype, was based on the full-length Kübelwagen wheelbase of 2.40 m (7 ft 10 in). Pre-production units of the 128, fitted with custom welded bodytubs, demonstrated that this construction was too weak for off-road use. It had insufficient torsional rigidity, and easily suffered hull-ruptures at the front cross-member, as well as in the wheel-wells. This was unacceptable for an amphibious vehicle. The large-scale production models (Type 166) had a reduced wheelbase of 2.00 m (6 ft 7 in) which resolved these issues.

Schwimmwagens were produced by the Volkswagen factory at Stadt des KdF-Wagens bei Fallersleben and Porsche's facilities in Stuttgart; with the bodies (or rather hulls) produced by Ambi Budd in Berlin. 15,584 Type 166 Schwimmwagen were produced from 1941 through 1944; 14,276 at Fallersleben and 1,308 by Porsche; the VW 166 is the most-produced amphibious car in history.^[2] The Schwimmwagen Registry lists 189 examples currently in existence of which 13 have survived without restoration work.^[3]

All Schwimmwagens were four-wheel drive in first gear (and reverse gears on some models) only and had ZF self-locking differentials on the front and rear axles. As with the Kübelwagen, the Schwimmwagen had rear portal axles, which provided increased ground clearance, while at the same time reducing drive-line torque stresses with their gear reduction at the wheels. The Schwimmwagen had a top speed of 80 km/h (50 mph) on land.

When crossing a body of water a screw propeller could be lowered down from the rear deck/engine cover. When in place a simple coupling provided drive straight from an extension of the engine's crankshaft. This meant that screw propulsion always drove forward. The Schwimmwagen had a top speed of 10 km/h (6 mph) in the water. For reversing in the water there was the choice of using the standard equipment paddle or running the land drive in reverse, allowing the wheel-rotation to slowly take the vehicle back. The front wheels doubled up as rudders, so steering was done with the steering wheel both on land and on water. The Schwimmwagen could also be steered by the passengers using the paddle(s).

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  Hermann Göring with a Schwimmwagen at Carinhall
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  German officers in a Schwimmwagen in France in 1944
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  Schwimmwagen at the Imperial War Museum Duxford
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  Schwimmwagen interior
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  Type 166 Schwimmwagen
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  Schwimmwagen at the Army Museum Dresden
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  Detail of Schwimmwagen propeller
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  Schwimmwagen
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  A Schwimmwagen loaded with two Panzerfaust 60 anti-tank weapons