 {| |} the pratt & whitney r-1340 wasp was an aircraft engine of the reciprocating type that was widely used in american aircraft from the 1920s onward. it was the pratt & whitney aircraft company's first engine, and the first of the famed wasp series.gunston 1989, p.114. it was a single-row, nine-cylinder, air-cooled, radial design, and displaced 1,344 cubic inches (22&nbsp;l); bore and stroke were both 5.75&nbsp;in (146&nbsp;mm). a total of 34,966 engines were produced.pratt&whitney r-1340 page retrieved: 25 october 2008 as well as numerous types of fixed-wing aircraft, it was used to power helicopters, the agusta-bell ab.102 and the sikorsky h-19, and a class of airship, the k-class blimp. ==variants== ;r-1340-7: ,  ;r-1340-8:  ;r-1340-9: ,  ;r-1340-16:  ;r-1340-17:  ;r-1340-19:  ;r-1340-19f:  ;r-1340-21g:  ;r-1340-22:  ;r-1340-23:  ;r-1340-30:  ;r-1340-31:  ;r-1340-33:  ;r-1340-48:  ;r-1340-49:  ;r-1340-an1: ,  ;r-1340-an2: , 3:2 geared prop shaft ;r-1340-b:  ;r-1340-d:  ;r-1340-s1d1: ;r-1340-s1h1-g:,  ;r-1340-s3h1: ;r-1340-t1d1: ==applications==  {{columns-list|2| * agusta-bell ab.102 * air tractor at-301 * air tractor at-401 * ayres thrush * bach air yacht * boeing model 40a * boeing 247 * boeing f3b * boeing f4b * boeing p-12 * [[bo
Aircraft_piston_engines_1920a1929 Pratt_&_Whitney_aircraft_engines Radial_engines