Quote:
Originally posted by tankbarrell
The Shermans had the R975, originally the C-1, superceded by the C-4. They were both built as tank engines though using some aircraft parts. The C-4 was an improved model with many changes.
The M3 Lee/Grants had the R975 EC2 which was an aircraft engine modified to fit in tanks.
The M3 Stuarts had a seven cylinder Continental W-670 of 250 hp. This is essentially a Boeing PT17 engine, again modified for tank use. 
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Hi Mr. Tankbarrell..
You obviously know your radials and tanks..The startup proceedure I wrote out was for the Ram tank which also has the R975 EC2....also super charged...
I believe that the start up proccedure would be similar to the other models.......
Hopefully between the lot of us we can help out so Nigel won't cook his kilt...