Pratt & Whitney R-2180-E Twin Wasp E

R-2180-E Twin Wasp E
	A Saab Scandia powered by two P&W R-2180 Twin Wasp E engines
Type	Radial engine
National origin	United States
Manufacturer	Pratt & Whitney
First run	1945[citation needed]
Major applications	Saab 90 Scandia
Developed from	Pratt & Whitney R-2800 ; Pratt & Whitney R-4360

The Pratt & Whitney R-2180-E Twin Wasp E was a radial aircraft engine developed in the United States by Pratt & Whitney. It had two rows of seven cylinders each. Its only production application was on the post-World War II Saab 90 Scandia airliner.

Design and development

The R-2180-E is effectively a fourteen-cylinder simplification of the twenty-eight cylinder R-4360 Wasp Major engine; its cylinders are the same size and displacement as those of the Wasp Major.^[1]

The R-2180-E Twin Wasp E was available in a "power-egg" installation certificated in 1945 for use as an engine upgrade for the Douglas DC-4.^[2]

Applications

Specifications (R-2180-E1)

Data from Aviation Week^[4]

General characteristics

Type: 14-cylinder, supercharged, air-cooled, twin-row radial engine
Bore: 5.75 in. (146 mm)
Stroke: 6.00 in. (152 mm)
Displacement: 2,181 in³ (35.7 L)
Length: 76.20 in (1.94 m)
Diameter: 54 in (1.37 m)
Dry weight: 1,870 lb (850 kg)

Components

Fuel system: Stromberg AR-48C1
Fuel type: 100/130 octane
Cooling system: Air-cooled

Performance

Power output:
- Take-off without water injection: 1,650 hp (1,230 kW)
- Take-off with water injection: 1,800 hp (1,300 kW)
- Max continuous: 1,400 hp (1,000 kW)
- Normal: 1,300 hp (970 kW)
Compression ratio: 7:1

References

Citations

^ "World Encyclopedia of Aero Engines - 5th edition" by Bill Gunston, Sutton Publishing, 2006, P.164
^ "World Encyclopedia of Aero Engines - 5th edition" by Bill Gunston, Sutton Publishing, 2006, P.164
^ Harding, Stephen (1997). U.S. Army Aircraft Since 1947. Atglen, PA, USA: Schiffer Publishing Ltd. pp. 202. ISBN 076430190X. LCCN 96-69996.
^ Stone 1948, p. 22.

Bibliography

Baldry, Dennis; Chant, Chris; Stroud, John (1980). Gunston, Bill (ed.). The Illustrated Encyclopedia of Propeller Airliners. London: Phoebus Publishing. ISBN 0-7112-0062-9.
Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.
Stone, Irving (October 22, 1948). "Latest Piston Powerplant: R-2180". Aviation Week. Vol. 49, no. 21. Albany, New York: McGraw-Hill. pp. 21–22.
White, Graeme (2006). R-4360: Pratt & Whitney's Major Miracle. North Branch, Minnesota: Specialty Press. ISBN 978-1-58007-097-3.

External links

[1] "World Encyclopedia of Aero Engines - 5th edition" by Bill Gunston, Sutton Publishing, 2006, P.164

[2] "World Encyclopedia of Aero Engines - 5th edition" by Bill Gunston, Sutton Publishing, 2006, P.164

[Harding-3] Harding, Stephen (1997). U.S. Army Aircraft Since 1947. Atglen, PA, USA: Schiffer Publishing Ltd. pp. 202. ISBN 076430190X. LCCN 96-69996.

[FOOTNOTEStone194822-4] Stone 1948, p. 22.

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