Warner Scarab
The Warner Scarab is an American seven-cylinder radial aircraft engine, that was manufactured by the Warner Aircraft Corporation of Detroit, Michigan in 1928 through to the early 1930s. In military service the engine was designated R-420.
Variants
- Super Scarab SS-50/R-500
- Super Scarab SS-50A/R-550
Junior
A scaled-down five-cylinder version of the engine was produced as the Warner Scarab Junior.
Applications
Amongst the many uses for the Scarab, the engine was fitted to the Cessna Airmaster and the Fairchild 24 (UC61 or Argus). Notably, in 1942, it was put into use powering the Sikorsky R-4, the first helicopter to be put into production.
Many of these reliable engines soldier on today, many still powering the aircraft to which they were originally mounted. They are also in demand as realistically sized, though far more powerful, replacement powerplants for many replica or restored World War I era airplanes which were originally fitted with rotary engines.
Application list
Specifications (Scarab 50)
Data from FAA Type Certificate Data Sheet (TCDS).[1]
General characteristics
- Type: Seven-cylinder, air-cooled, radial piston engine
- Bore: 4.25 in (108 mm)
- Stroke: 4.25 in (108 mm)
- Displacement: 422 cu in (6.92 L)
- Length: 14 in (35.5 cm)
- Height: 36.5 in (93 cm)
- Dry weight: 292 lb (132.5 kg)
Components
- Valvetrain: 1 inlet and 1 exhaust valve per cylinder
- Fuel system: 2 Stromberg carburetors
- Fuel type: 67 octane Avgas
- Cooling system: Air-cooled
Performance
See also
- Related development
- Comparable engines
- Related lists
References
External links
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Junior · Scarab (R-420) · Scarab Jr · Super Scarab (R-500 and R-550)
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