Pratt & Whitney R-1340 Wasp Pratt & Whitney R-985 Wasp Junior Pratt & Whitney R-1830 Twin Wasp Pratt & Whitney R-1535 Twin Wasp Junior Pratt & Whitney R-2000 Twin Wasp Pratt & Whitney R-2180-E Twin Wasp E Pratt & Whitney R-2800 Double Wasp Pratt & Whitney R-4360 Wasp Major