Martin 4-333, Inverted In-line 4 Engine
date: label: Date
content: Circa 1930
name: label: Manufacturer
content: Martin Motors Company
notes: label: Physical Description
content: Type: Reciprocating, In-line, Inverted, 4 cylinders, Air-cooled
label: Physical Description
content: Power: 89.5 kW (120 hp) at 2,100 rpm
label: Physical Description
content: Displacement: 5.47 L (333.98 cu in.)
label: Physical Description
content: Bore and Stroke: 114 mm (4.5 in.) x 133 mm (5.25 in.)
label: Physical Description
content: Weight: 120 kg (265 lb)
label: Summary
content: The Chevrolet Brothers Aircraft Company, owned by Swiss immigrants Arthur and Louis Chevrolet, well known designers of automobile engines and drivers of race cars, designed this in-line, inverted four-cylinder aircraft engine. In advertisements, Louis Chevrolet was quoted as saying "Upside down is right side up." For among the advantages of the design were improved pilot visibility and propeller ground clearance. Designated Model D-4, the engine was certificated in December 1929, and became known as the Chevrolair. A D-4 engine powered Travel Air low-wing aircraft won first place in its class at the September 1930 Cleveland National Air Races.
label: Summary
content: Subsequently, the Chevrolet Brothers Aircraft Company failed and the engine design sold to the Glenn L. Martin Company of Baltimore, Maryland. Uprated and renamed Martin 333, it was recertificated in July 1930, and powered the Martin 162A Tadpole Clipper and various Driggs aircraft.
place: label: Country of Origin
content: United States of America
setName: label: See more items in
content: National Air and Space Museum Collection
creditLine: label: Credit Line
content: Exchange with the Airpower Museum, Ottumwa, Iowa
dataSource: label: Data Source
content: National Air and Space Museum
identifier: label: Inventory Number
content: A19900256000
objectType: label: Type
content: PROPULSION-Reciprocating & Rotary
objectRights: label: Restrictions & Rights
content: CC0
physicalDescription: label: Materials
content: Aluminum, Steel, Paint, Phenolic, Rubber, Magnesium
label: Dimensions
content: Length 116. 2 cm (45.75 in.), Width 45.09 cm (17.75 in.), Height 87.00 cm (34.25 in.)