Pratt & Whitney R-1830 Twin Wasp

The R -1830 Twin Wasp is an air cooled aircraft engine with 14 cylinders of the U.S. manufacturer Pratt & Whitney, and was the first double radial engine ( 2 x 7 cylinder ) from the Wasp engine number of the company. The series production ran from 1932 until 1951. Crafted with 173 618 copies of the R -1830 is the most produced aircraft engine.

Description

The four-stroke engine has a total displacement of 30.2 liters (equivalent to 1830 cubic inches, as reflected in the name is ). It was designed square, which means that his stroke and his hole was the same (5.5 inches corresponds to 139.7 mm). The first run, and the first flight took place in 1931. From 1942 to 2000 cubic inches an enlarged version was produced as a P & W R -2000.

In order to achieve a maximum power of 1000 HP, the R -1830 Twin Wasp needed aviation fuel with the highest octane number ( Avgas 100). It has been used in aircraft, such as the Consolidated B -24 " Liberator ", the Martin A-22 " Maryland ", the Douglas DC-3 or in their military versions, the Consolidated PBY " Catalina ", the Consolidated PB2Y " Coronado " and the Grumman F4F " Wildcat " as well as in British aircraft such as the Short Sunderland S. 25 and the Bristol Beaufort.

There were different stages of development:

  • R 1830-64 - 900 hp ( 671 kW)
  • R -1830 - 86-1200 hp ( 895 kW)
  • R- 1830- 90C - 1350 hp ( 990 kW)

Technical data (R -1830 -86)

  • Type: Air-cooled 14 -cylinder four-stroke radial engine with supercharging
  • Bore: 5.5 inches ( 139.7 mm)
  • Stroke: 5.5 inches ( 139.7 mm)
  • Capacity: 1830 cubic inches ( 30.2 liters)
  • Compression: 6,1:1 and 6,5:1 ( depending on version)
  • Mass: 528-667 kg
  • Power: 1350 hp ( 895 kW) at 2400 rpm
  • Maximum speed: 2700/min
  • Power to weight ratio: 0.49 kg / hp ( at 667 kg Mass )
  • Construction period: 1932-1951

Variations

  • R -1830 13 - 600 hp ( 447 kW), 950 hp ( 708 kW), 1050 hp ( 783 kW)
  • R -1830 - 64-850 hp ( 634 kW), 900 hp ( 671 kW)
  • R -1830 - 9-950 hp ( 708 kW)
  • R -1830 - 66-1000 hp ( 746 kW), 1050 hp ( 783 kW ), 1200 hp ( 895 kW)
  • R -1830 - 72-1050 hp ( 783 kW)
  • R- 1830- S1C3 -G - 1050 hp ( 783 kW)
  • R- 1830- S6C3 -G - 1100 hp ( 820 kW)
  • R -1830 17 - 1200 hp ( 895 kW)
  • R -1830 21 - 1200 hp ( 895 kW)
  • R -1830 - 36-1200 hp ( 895 kW)
  • R -1830 33 - 1200 hp ( 895 kW)
  • R -1830 41 - 1200 hp ( 895 kW) equipped with a General Electric B-2 turbocharger
  • R -1830 - 43-1200 hp ( 895 kW)
  • R -1830 - 49-1200 hp ( 895 kW)
  • R -1830 - 65-1200 hp ( 895 kW)
  • R -1830 - 76-1200 hp ( 895 kW)
  • R -1830 - 82-1200 hp ( 895 kW)
  • R -1830 - 86-1200 hp ( 895 kW)
  • R -1830 - 88-1200 hp ( 895 kW)
  • R -1830 - 90-1200 hp ( 895 kW)
  • R -1830 -90 B - 1200 hp ( 895 kW)
  • R -1830 - 92-1200 hp ( 895 kW)
  • R- 1830- S3C4 - 1200 hp ( 895 kW)
  • R- 1830- S3C4 -G - 1200 hp ( 895 kW)
  • R -1830 - 94-1350 hp ( 1007 kW)

Others

Like most radial engines have this engine has a relatively large loss of oil and oil consumption. The oil loss is because with the engine, the oil drains into the lower cylinder and then drips through the exhaust valves. In operation, an oil consumption between four and twelve liters per engine flight hour and is nothing unusual.

Grumman F4F Wildcat
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