Pratt & Whitney R-1830 Twin Wasp

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R-1830 Twin Wasp
R-1830 IWM.JPG
R-1830 on display at the Imperial War Museum Duxford
Type Radial engine
National origin United States
Manufacturer Pratt & Whitney
First run 1932
Major applications Consolidated B-24 Liberator
Douglas C-47 Skytrain
Grumman F4F Wildcat
Consolidated PBY Catalina
Number built 173,618 [1]
Variants Pratt & Whitney R-2000 Twin Wasp

The Pratt & Whitney R-1830 Twin Wasp was an American aircraft engine widely used in the 1930s and 1940s. Produced by Pratt & Whitney, it was a two-row, 14-cylinder, air-cooled radial design. It displaced 1,830 cu in (30.0 L) and its bore and stroke were both 5.5 in (140 mm). A total of 173,618 R-1830 engines was built,[1] and from their use in two of the most-produced aircraft ever built, the B-24 bomber and DC-3 transport, more Twin Wasps may have been built than any other aviation piston engine in history. A "bored-out" version (to a 5.75 inch/146 mm cylinder bore) with a slightly higher power rating and other slight changes in detail design was produced as the R-2000.

Variants[edit]

  • R-1830-1: 800 hp (597 kW)
  • R-1830-9: 850 hp (634 kW), 950 hp (708 kW)
  • R-1830-11: 800 hp (597 kW)
  • R-1830-13: 900 hp (671 kW), 950 hp (708 kW), 1,050 hp (783 kW)
  • R-1830-17: 1,200 hp (895 kW)
  • R-1830-21: 1,200 hp (895 kW)
  • R-1830-25: 1,100 hp (820 kW)
  • R-1830-33: 1,200 hp (895 kW)
  • R-1830-35: 1,200 hp (895 kW) Fitted with GE B-2 turbosupercharger
  • R-1830-41: 1,200 hp (895 kW) Fitted with GE B-2 turbosupercharger
  • R-1830-43: 1,200 hp (895 kW)
  • R-1830-45: 1,050 hp (783 kW)
  • R-1830-49: 1,200 hp (895 kW)
  • R-1830-64: 850 hp (634 kW), 900 hp (671 kW)
  • R-1830-65: 1,200 hp (895 kW)
  • R-1830-66: 1,000 hp (746 kW), 1,050 hp (783 kW), 1,200 hp (895 kW)
  • R-1830-72: 1,050 hp (783 kW)
  • R-1830-76: 1,200 hp (895 kW)
  • R-1830-82: 1,200 hp (895 kW)
  • R-1830-86: 1,200 hp (895 kW)
  • R-1830-88: 1,200 hp (895 kW)
  • R-1830-90: 1,200 hp (895 kW)
  • R-1830-90-B: 1,200 hp (895 kW)
  • R-1830-92: 1,200 hp (895 kW)
  • R-1830-94: 1,350 hp (1,007 kW)
  • R-1830-S1C3-G: 1,050 hp (783 kW), 1,200 hp (895 kW)
  • R-1830-S3C4: 1,200 hp (895 kW)
  • R-1830-S3C4-G: 1,200 hp (895 kW)
  • R-1830-S6C3-G: 1,100 hp (820 kW)
  • R-1830-SC-G: 900 hp (671 kW)
  • R-1830-SC2-G: 900 hp (671 kW), 1,050 hp (783 kW)
  • R-1830-SC3-G: 1,065 hp (749 kW) same engine built in Sweden as STWC-3G by SFA company for Swedish J 22, B 17 and B 18.

Applications[edit]

R-1830 mounted on the left wing of an ex-military Douglas C-47
RAF Dakota's Twin Wasp out for servicing

Engines on display[edit]

Specifications (R-1830-S1C-G)[edit]

Pratt & Whitney R-1830 "Twin Wasp" (sectioned)

Data from [3]

General characteristics

  • Type: Fourteen-cylinder two-row supercharged air-cooled radial engine
  • Bore: 5.5 in (139.7 mm)
  • Stroke: 5.5 in (139.7 mm)
  • Displacement: 1,829.4 in³ (30 l)
  • Length: 59.06 in (1,500 mm)
  • Diameter: 48.03 in (1,220 mm)
  • Dry weight: 1,250 lb (567 kg)

Components

Performance

See also[edit]

Related development
Comparable engines
Related lists

References[edit]

  • Angelucci, Enzo (1988, Revised Edition 2006). Complete Book of World War II Combat Aircraft. VMB Publishers. ISBN 978-88-540-0829-8. 
  • Bridgman, Leonard, ed. Jane's All The World's Aircraft 1951–1952. London: Samson Low, Marston & Company, Ltd 1951.

External links[edit]