In 1927, Pratt & Whitney began researching twin-row radial engines. One result, the R-1830 Twin Wasp, first flew in 1931. It was one of the most efficient and reliable engines of the 1930s.

The R-1830 was in production from 1931 through 1951. Over 173,000 were produced, more than any other aircraft engine (per Pratt & Whitney).

models

• R-1830-9: 950 hp (708 kW)
• R-1830-S1B3G: 1,000 hp (745 kW)
• R-1830-S1C3G: 1,200 hp (895 kW)
• R-1830-13: 1,050 hp (783 kW)
• R-1830-24: 1,050 hp (783 kW)
• R-1830-36: 1,200 hp (895 kW)
• R-1830-65: 1,200 hp (895 kW) w/turbocharger
• R-1830-92: 1,200 hp (895 kW)

specifications

• 14 cylinder, air-cooled, two-row radial
• displacement: 1,830 cubic inches (30 litres)
• Bore x stroke: 5.5 x 5.5 inches

used by

• Seversky AT-12 Guardsman
• Consolidated B-24 Liberator
• Douglas DC-3/C-47
• Grumman F4F Wildcat
• Seversky P-35
• Curtiss P-36 Hawk
• Republic P-43 Lancer
• Consolidated PBY Catalina
• Laird-Turner RT-14 Meteor
• Douglas TBD Devastator
• Martin XB-14