NS C39-8

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Posts: 53
Joined: Sun Feb 26, 2012 6:07 pm

NS C39-8

Post by es80ac » Sun Jul 31, 2016 9:08 pm

I understand all NS C39-8 and C39-8E has been retired. Is there any significant difference between C39-8E and C40-8? Seems like there are some negative comments regarding C39-8 from a few people, anybody know why that is the case?

Allen Hazen
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Joined: Fri Mar 12, 2004 10:14 pm
Location: Edmonton, Canada (formerly Melbourne, Australia)

Re: NS C39-8

Post by Allen Hazen » Sun Jul 31, 2016 11:46 pm

I ***think*** (my memory was always fallible and isn't getting any better with age, and C-39-8E production was twenty-nine years ago!) that the change from C-39-8E to C-40-8 involved a new turbocharger, not just a change in the control software. But check with someone else before betting money on that!

There is one visual difference: the C39-8E had the air reservoirs in the conventional location (mount crosswise on the frame, one before and one after the fuel tank), whereas the C-40 made the change to having them mounted in an indentation on the side of the fuel tank on the right side.

Neither is a really MAJOR major difference. Given the overall similarities, however, perhaps the C-40 amounted to a refined and thoroughly debugged version of the C39-8E: maybe the C39-8E got blamed for what were in effect teething troubles for the design? (But that is sheer speculation on my part with nothing to back it up.)

Engineer Spike
Posts: 1920
Joined: Tue Mar 16, 2004 3:24 pm

Re: NS C39-8

Post by Engineer Spike » Thu Oct 13, 2016 1:11 pm

It's surprising that NS didn't rebuild them. Look at all the used Chevys they got All the SD60, which were fodder for the SD60E program, and the SD90 MAC program.

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