Pratt & Whitney R-1690 Hornet

The Pratt & Whitney R-1690 Hornet was a widely used American aircraft engine. Developed by Pratt & Whitney, 2,944 were produced from 1926 through 1942. It first flew in 1927. It was a single-row, 9-cylinder air-cooled radial design. Displacement was 1,690 cubic inches (27.7 L). It was built under license in Italy as the Fiat A.59. In Germany, the BMW 132 was a developed version of this engine. The R-1860 Hornet B was an enlarged version produced from 1929.

Variants

 * R-1690-3: 525 hp
 * R-1690-5: 525 hp
 * R-1690-11: 775 hp
 * R-1690-13: 625 hp
 * R-1690-S5D1G: 700 hp
 * R-1690-52: 750 hp
 * R-1690-SDG:
 * R-1690-S1EG: 750 hp
 * R-1690-S2EG:
 * R-1690-25: 850 hp
 * R-1690-S1C3G: 1,050 hp
 * Fiat A.59 R.: License built in Italy with reduction gearing.
 * Fiat A.59 R.C.: License built in Italy with reduction gearing and supercharger.
 * BMW Hornet:License production of the Hornet in Germany, independently developed as the BMW 132.

Applications
• Bach Air Yacht

• Bellanca 31-40

• Boeing 80

• Boeing Model 95

• Boeing Model 299

• Burnelli UB-14

• Douglas O-38

• Focke-Wulf Fw 200 V1

• Gee Bee Model R-2 (1933)

• Gee Bee R 1/2 Super Sportster

• Granville-Miller-de Lackner R-6H "Q.E.D."

• Junkers Ju 52

• Junkers Ju 86

• Junkers W 34

• Keystone B-3

• Lockheed Model 14 Super Electra (L-14H)

• Lockheed Lodestar (C-56A, C-56B, C-56C, C-56D, C-56E, C-59/Mk 1a)

• Martin BM

• Martin XB-14

• Vought O2U Corsair

• Sikorsky S-40A

• Sikorsky S-42

• Sikorsky S-43

• Wedell-Williams Model 44

Engines on display

 * There is a R-1690 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, CT.