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Benz & Cie of Mannheim, Germany, manufactured nearly 6,500 Benz BZ 4S engines between 1914 and 1918. The engine followed the usual German practice of having a separate water-cooled cylinder bolted to the crank case by long studs. The studs passed through the crank chamber top half and secured the crank shaft bearings between the top and bottom halves of the crank case.

The BZ 4S powered various German reconnaissance, bomber, and infantry patrol aircraft, including the Ago C.II, C.IV, and C.VII; A.E.G. J.I and J.II; Albatros J.I and C.VII; D.F.W. C.V; Halberstadt C.V; and Junkers J.I.

 Display Status

This object is on display in Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.

Boeing Aviation Hangar
Object Details
Date 1914 Country of Origin Germany Type PROPULSION-Reciprocating & Rotary Manufacturer Benz
 Physical Description Type: Reciprocating, In-line, 6 cylinders, liquid cooled Power rating: 205 kW (275 hp) at 1,500 rpm Displacement: 18.8 L (1,149 cu in.) Bore and Stroke: 145 mm (5.71 in.) x 190 mm (7.48 in.) Weight: 385 kg (848 lb) Dimensions Length 149.9 cm (59.0 in.), Width 53.1 cm (20.9 in.), Height 131.3 cm (51.7 in.)
 Inventory Number A19670100000 Credit Line Found in collection Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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