Originally Posted by
megan
Are you absolutely certain of their provenance Dave? The reason I ask is of the following (FAA TCDS),
Optional Engines DC-3C
Interchangeable with the S1C3G engines. Ratings are same as S1C3G. 100 min. grade fuel must be used unless carburetor setting is revised to permit use of 91 grade fuel. All must have 16:9 reduction gearing:
R-1830-49, R-1830-57, R-1830-82, R-1830-96, R-1830-92
Interchangeable with the S4C4G engine at identical ratings. Ignition timing must be modified to 20° for 91 grade fuel. All must have 16:9 reduction gearing:
S3C4G, R-1830-90C, R-1830-65, R-1830-43, R-1830-90D, R-1830-67, R-1830-43A
So the engine designation would not necessarily point to the aircrafts ancestry. Of course the British may do things differently, and is the reason for asking Dave
True, but if an aircraft is designated as a DC-3C, then that means
by definition that it started life as a C-47 or R4D.
TC A-669 (the first of your links) specifically identifies (P9) the following MSN ranges (all originally C-47Bs, I think) as applicable to the DC-3C-R-1890-90C:
20599-20898
25524-27223
32527-33626
34134-34135
34137-34144
34146-34167
34169-34190
34192-34211
34213-34233
34235-34249
34251-34263
34265-34277
34279-34290
34292-34304
34306-34317
34319-34409
though it doesn't necessarily mean that every MSN in those ranges was converted.