Pratt & Whitney R-1830

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The Pratt & Whitney R-1830 Twin Wasp was an engine widely used in American aircraft in the 1930s and 1940s. Produced by Pratt & Whitney, it was a two-row, 14 cylinder, air-cooled radial design. It displaced 1,830 cubic inches (30 L) and its bore and stroke measured 5.5 and 5.5 in (140 and 140 mm), respectively. An enlarged version (bore increased to 5.75") with reduced compression to operate on 80/87 fuel, yet with comparable power is known as the R-2000.

Contents 1 Models 2 Specifications (R-1830-86) 3 Applications 4 Related content 5 References 6 External links

[edit] Models

• R-1830-13 - 600 hp (447 kW) , 950 hp (708 kW) , 1,050 hp (783 kW)
• R-1830-1 - 800 hp (597 kW)
• R-1830-64 - 850 hp (634 kW) , 900 hp (671 kW)
• R-1830-SC-G - 900 hp (671 kW)
• R-1830-SC2-G - 900 hp (671 kW), 1,050 hp (783 kW)
• R-1830-9 - 950 hp (708 kW)
• R-1830-66 - 1,000 hp (746 kW) , 1,050 hp (783 kW) , 1,200 hp (895 kW)
• R-1830-45 - 1,050 hp (783 kW)
• R-1830-72 - 1,050 hp (783 kW)
• R-1830-S1C3-G - 1,050 hp (783 kW)
• R-1830-S6C3-G - 1,100 hp (820 kW)
• R-1830-25 - 1,100 hp (820 kW)
• R-1830-35 - 1,200 hp (895 kW) Fitted with GE B-2 turbosupercharger
• R-1830-17 - 1,200 hp (895 kW)
• R-1830-33 - 1,200 hp (895 kW)
• R-1830-41 - 1,200 hp (895 kW) Fitted with GE B-2 turbosupercharger
• R-1830-43 - 1,200 hp (895 kW)
• R-1830-49 - 1,200 hp (895 kW)
• R-1830-65 - 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-S3C4 - 1,200 hp (895 kW)
• R-1830-S3C4-G - 1,200 hp (895 kW)
• R-1830-94 - 1,350 hp (1,007 kW)

[edit] Specifications (R-1830-86)

General characteristics

• Type: 14-cylinder air-cooled two-row radial engine
• Bore: 5.5 in (140 mm)
• Stroke: 5.5 in (140 mm)
• Displacement: 1,829.4 in³ (30 L)
• Diameter: 48.19 in (1224 mm)
• Dry weight: 1,162-1,467 lb (528-667 kg)

Components

• Valvetrain: Poppet, two valves per cylinder
• Supercharger: Single stage single speed centrifugal type supercharger
• Fuel system: One Stromberg injection carburetor
• Fuel type: 91/98 octane gasoline
• Cooling system: Air-cooled

Performance

• Power output:
• 1,200 hp (895 kW) at 2700 rpm at 4900 ft (1500 m)
• 1050 hp (783 kW) at 2550 rpm at 7500 ft (2250 m)
• Specific power: 0.66 hp/in³ (29.8 kW/L)
• Specific fuel consumption: 1.0 lb/(hp·h) (0.61 kg/(kW·h))
• Power-to-weight ratio: 0.91 hp/lb (1.50 kW/kg) (average weight estimation)

[edit] Applications

 United States

• Bristol Beaufort  Australia
• Bloch MB.176  France
• CAC Boomerang  Australia
• CAC Woomera  Australia
• Burnelli CBY-3  Canada
• Consolidated B-24
• Consolidated PBY Catalina
• Consolidated PB2Y Coronado
• Consolidated PB4Y Privateer
• Curtiss P-36 Hawk
• Douglas C-47
• Douglas DB-7 (early variants only)
• Douglas TBD Devastator
• FFVS J22  Sweden
• Grumman F4F Wildcat
• Lioré et Olivier LeO 453  France
• Martin Maryland
• Republic P-43
• Saab 17  Sweden
• Saab 18  Sweden
• Short Sunderland MK V  United Kingdom
• Seversky P-35
• VL Myrsky  Finland
• Vultee P-66 Vanguard

[edit] Related content

• Pratt & Whitney Wasp series
• R-1340 Wasp
• R-985 Wasp Junior
• R-1535 Twin Wasp Junior
• R-2800 Double Wasp
• R-4360 Wasp Major

• Bristol Hercules - similar layout and output

[edit] References

Bridgman, Leonard, ed. Jane’s All The World’s Aircraft 1951-1952. London: Samson Low, Marston & Company, Ltd 1951.

[edit] External links

• http://www.pw.utc.com/vgn-ext-templating/v/index.jsp?vgnextoid=d3aef3b8f77fb010VgnVCM1000000881000aRCRD