N.A.G. Conrad C.111 aircraft engine by Nationale Automobil-Gesellschaft
Object No. B2550
The is a 185 hp, 6 cylinder in-line German aero engine from First World War period known as the Conrad C.111. Made by the Nationale Automobil-Gesellschaft (NAG), these engines were typically used in the DFW C.V biplane deployed by Germany and Bulgaria for reconnaissance, bombing and training during World War I. The Conrad C.III engine was superseded by the more powerful Benz Bz.IV engine which gave better performance. This aircraft engine is part of the Museum's Barraclough Collection. Sir Henry Barraclough was Professor of Mechanical Engineering at the University of Sydney and was interested in military engineering. He made trips to Europe to acquire stationary engines for the University, and several rare and significant examples have been preserved by the Museum since they became outdated for teaching purposes. During World War I Barraclough supervised a large contingent of Australian ammunition workers in Britain, and at the end of the war he had the foresight to acquire a group of aero engines made in several countries that had been parties to the conflict. This group, which includes this N.A.G. type Conrad C.III, was later donated to the Museum and is significant as a record of the diversity of engine designs in the early days of powered flight. https://en.wikipedia.org/wiki/DFW_C.V Prepared by N.L. Svensson February 2007, edited by Judith Campbell, MAAS volunteer, February 2017
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Summary
Object Statement
Aircraft engine, N.A.G. Conrad C.111, 185 hp, upright, 6 cylinder in-line, water-cooled, WWI aero engine, serial number 13217, steel, made by Nationale Automobil-Gesellschaft, Berlin, Germany, 1919
Physical Description
Aircraft engine, N.A.G. Conrad C.111, 185 hp, upright, 6 cylinder in-line, water-cooled, WWI aero engine, serial number 13217, steel, made by Nationale Automobil-Gesellschaft, Berlin, Germany, 1919 The Conrad C.III has six upright cylinders bolted to the upper half of the crankcase. The cylinders are made of steel machined from forgings and fitted with valve pockets screwed and welded into the cylinder head. A corrugated steel water jacket covers the lower portion of the cylinder and cylinder head. Two inlet and exhaust valves in each cylinder are operated by cam actuated rockers where the cam shaft is housed under a sheet steel cover. The valve motion was controlled by springs. The camshaft was driven at half engine speed through a vertical shaft housed in the tube at the rear of the engine. This shaft also drove the magnetos and water pump. Cooling water was circulated via a centrifugal pump with the pipes evident near the lower end of the cylinders and by the exhaust valves. The pistons are also of steel with a slightly concave head. Twin carburettors are mounted to the right of the engine (when viewed from the front) with air drawn from the crankcase. Two H.L.8 type Bosch magnetos are fitted at the rear end of the engine and two Bosch 3 point spark plugs are fitted to each side of the cylinders below the valves. Specifications Height: 1280 mm Length: 1720 mm Width: 540 mm
PRODUCTION
Notes
Robert Conrad had designed a 185 hp engine at the Deutsche Motorenbau-Gesellschaft which was successfully tested in 1916 and designated the CIII (C for Conrad) by the German military. Due to insufficient capacity at the Deutsche Motorenbau-Gesellschaft, the engine was manufactured at the National Automobil-Gesellschaft (NAG). NAG then produced a 210 hp version but this was discontinued as it proved to be less reliable that the 185 hp engine. https://en.wikipedia.org/wiki/Conrad_C.III Prepared by N.L. Svensson February 2007, edited by Judith Campbell, MAAS volunteer, February 2017
HISTORY
Notes
This object was originally lent to the Museum by the University of Sydney, Department of Mechanical Engineering, in December 1943. It is part of the Barraclough collection and was donated to the Museum in July 1983.
SOURCE
Credit Line
Presented by the University of Sydney, 1983
Acquisition Date
16 August 1983
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