Originally Posted by
WHBM
Regarding engines, I understand both P&W and Wright units were options on both the prewar DC3 and the C47. Someone can advise how interchangeable they were.
I believe a handful of DC-3s have had their Cyclones replaced by Twin Wasps (and possibly even vice versa). I suspect a bit of work is involved.
AFAIK, no C-47s were built with Wright engines.
Looking at some notes I put together a while back when answering a different question, there were 8 basic families of variants as defined by the various FAA Type Certificates:
A-607: DST (Wright Cyclone)
A-618: DC-3, C-49, C-50, C-51, R4D-2 (Cyclone/R-1820)
A-619: DC-3A (P&W Twin Wasp)
A-635: DC-3B (Cyclone)
A-647: DST-A (Twin Wasp B)
A-669: DC-3A, DC-3C, DC-3D, C-41, C-47, C-48, C-52, C-53, C-68, C-117A, R4D (Twin Wasp/R-1830)
A-671: DST-A (Twin Wasp C)
6A2: Super DC-3, C-117D, R4D-8 (Twin Wasp/R-1830)