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Wright J-3/J-4/J-5 Whirlwind

The Engine  Specifications
The Lawrence J-1 and J-2 were acquired by Wright Aeronautical in 1923.  Wright's J-3 was a strengthened version of the J-2 and their J-4 (now named the Whirlwind) introduced improved cylinders.

The J-5 introduced in 1926 had completely redesigned cylinders with salt-cooled exhaust valves.  The J-5 Whirlwind achieved sudden fame when it was used to power Charles Lindbergh's "Spirit of St. Louis" to Paris in 1927.

The U.S. military designated this engine the R-790.

9 cylinder, air-cooled, radial

displacement: 788 cubic inches  (12.9 liters)
Bore x stroke: 4.5 x 5.5 inches
 Models  Used by
R-790: 225 hp (168 kW)
Consolidated PT-3/NY-1
Ryan M-1
Ryan NYP
 Related Pages
More about Wright Aeronautical

page updated 03 August 2007



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Kenneth W Shanaberger 2000 - 2010