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. 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:
;R-1690-5:
;R-1690-11:
;R-1690-13:
;R-1690-S5D1G:
;R-1690-52:
;R-1690-SDG:
;R-1690-S1EG:
;R-1690-S2EG:
;R-1690-25:
;R-1690-S1C3G:
;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.

Engines on display