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Austro-Daimler engines were built originally in Austria from the designs of Ferdinand Porsche, and later produced in Scotland by Arrol Johnston and William Beardmore and Son. Austro-Daimler was among the first to produce aircraft engines that attained a marked degree of success. The British, Russian, Italian, Austrian, and German armies adopted Austro-Daimler engines for airplanes and dirigibles prior to World War I, and airplanes equipped with Austro-Daimler engines set many early records.

Austro-Daimler almost exclusively made vertical four- and six-cylinder inline engines; and this Type D-35 was the only V-12 they ever made. A very rare artifact, this engine is believed to have been removed from the Ungarische Flugzeugwerke A.G. K 405 flying boat (a Hungarian license-built Brandenburg W 13) by the Naval Aircraft Factory in 1920.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date Circa 1920 Country of Origin Austria Type PROPULSION-Reciprocating & Rotary Manufacturer Austro-Daimler
 Physical Description Type: Reciprocating, 12 cylinders, V-type, Liquid-cooled Power rating: 257 kW (345 hp) at 1,400 rpm Displacement: 30.01 L (1,830.96 cu in) Bore and Stroke: 135 mm (5.31 in.) x 175 mm (6.89 in.) Weight: 509.6 kg (1,122.5 lb) Dimensions Height 91.4 cm (36 in.), Length 190.5 cm (75 in.), Width 83.8 cm (33 in.)
 Materials Steel, Aluminum, Preservative coating, Paint, Rubber, Phenolic, Ceramic, Wood
 Inventory Number A19731561000 Credit Line Transferred from the U.S. Navy, Naval Supply Center, Cheatham Annex, Williamsburg, Virginia Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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