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Pratt & Whitney Twin Wasp R-1830-92 Radial Engine

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Display Status:

This object is on display in the America by Air exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

Designed in 1930, the 14-cylinder, 597 kW (800 hp) Twin Wasp engine was first used in the Martin 130 China Clipper that inaugurated trans-Pacific commercial operations in 1935.

United Air Lines had 746 kW (1,000 hp) Twin Wasps installed in their Douglas DC-3As, which went into service in 1937. Other airlines also used Twin Wasp DC-3As, and 9,600 were built for the military as the C-47, C-53, and C-117 to become the principle transports used in World War II.

This version powered the Douglas C-47A, C-48, C-52, and C-53, all commercial or military versions of the DC-3. A total of 173,618 of all versions of the Twin Wasp engines were manufactured, including those for the World War II B-24 bomber, a number greater than any other large aircraft engine.

Collection Item Long Description:

Data Source

National Air and Space Museum

Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum

Manufacturer

Credit Line

Gift of Grumman Aerospace.

Materials

Metal

Dimensions

  • 3-D: 156.6 × 122.4cm, 664.5kg (61 5/8 × 48 3/16 in., 1464 15/16lb.)
  • Support: 121.9 × 215.9 × 121.9cm (48 × 85 × 48 in.)

Country of Origin

United States of America

Date

Circa World War II

Physical Description

  • Type: Radial, 14 cylinders, two rows, air-cooled, supercharger
  • Power rating: 895 kW (1,200 hp) at 2,700 rpm
  • Displacement: 30 L (1,828.4 cu in)
  • Bore and Stroke: 139.5 mm (5.5 in) x 139.5 mm (5.5 in)
  • Weight: 666 kg (1,467 lb)

Type

PROPULSION-Reciprocating & Rotary

Inventory Number

A19750478000