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Pratt & Whitney Twin Hornet R-2180 E1, 2-Row, Radial 14 Engine
Designed after World War II, the Twin Wasp E Series engine incorporated the best of what had been learned over the previous two decades. Aircraft manufacturers’ plans included a Douglas DC-3 replacement and a more powerful engine for the Douglas DC-4. To further the sale of the R-2180A engine and provide a power plant easily installed in the DC-4, Pratt & Whitney designed, built, and tested this R-2180 TWE-1.
Unfortunately, because the Douglas DC-6 and Lockheed Constellation were on the horizon, it was uneconomical to convert DC-4s to a more powerful engine, and the DC-3 replacement idea was superseded by a larger airplane requirement resulting in the Martin M-202 and Convair CV-240. Only the Swedish Saab Scandia emerged as a DC-3 replacement, using the R-2180 on a limited scale.
Pratt & Whitney built seventy five R-2180 Series E engines: 64 for Scandias, 10 direct drive versions for the Piasecki XH-16 helicopters, and this TWE-1, Serial No. P410003.
Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date
Circa 1938
Country of Origin
United States of America
Type
PROPULSION-Reciprocating & Rotary
Manufacturer
Pratt & Whitney
Physical Description
Type: Reciprocating, 14 cylinders, radial, 2-rows, air-cooled
Power rating: 1,342 kW (1,800 hp) at 2,800 rpm
Displacement: 35.7 L (2,180 cu in.)
Bore and Stroke: 146 mm (5.75 in.) x 152 mm (6.0 in.)
Weight: 849 kg (1,870 lb)
Dimensions
Diameter 137.2 cm (54.00 in.), Length 193.5 cm (76.20 in.)
Materials
HAZMAT: Cadmium Plating
Steel
Aluminum
Paint
Rubber
Plastic
Copper Alloy
Nickel Plating
Phenolic Resin
Felt
Paper
Adhesive
Grease Pencil
Inventory Number
A19550073000
Credit Line
Gift of Pratt & Whitney Aircraft
Data Source
National Air and Space Museum
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