Private Douglas DC-4 N500EJ
flyer1
Image ID: 202872
Views: 2045
Operator: Private - N500EJ
Aircraft: Douglas - DC-4
Airport: Puerto Rico - Aguadilla - Raphael Hernandez (Borinquen Field) (BQN / TJBQ)
Category: Main database
Photo taken on 2009-4-21 by Angel Duran [Contact]
Camera setting: NIKON D80, 1/50s, f/3.3 at 28mm ISO 200
Photographer's remark
(15.4.2012, 18:29 CET)
A close view of the P&W R-2000 engine. The R-2000 was an enlarged version of the Pratt & Whitney R-1830 Twin Wasp, with focus on reducing the manufacturing costs and fuel requirements. The bore was increased to 5.75 inch, while it still retained the 5.5 inch stroke. This brought displacement up to 2,000 in. There were a number of detail changes from the R-1830, such as front mounted instead of rear mounted magnetos, plain bearings for the crankshaft rather than roller bearings, and 87 octane fuel (specified because there were fears wartime supplies of 100 octane might fall short, but those fears were groundless). The R-2000 produced 1,300 hp @ 2,700 rpm with 87 octane, 1,350 hp with 100 octane and 1,450 hp @ 2,800 rpm with 100/130-grade fuel.
