B-B Diesel Hydraulic
Above: DD11 class leader DD11 1 in Japanese service.
This Japanese diesel hydraulic switcher/shunter was a gift from Japanese Unions to Vietnam Railways in 1977. The locomotive was the second of 3 locomotives numbered 1-3. A further 6 numbered 4-9 were built with some differences in 1957. The locomotive was built in 1954 as part of Japans postwar dieselization program. Whether the locomotive was ever actually used in Vietnam and if so for how long is not known. The only photos in Vietnam show it rusting away. It seems a rather sad way to treat a gift. If Vietnam ever gets a railway museum it would make an excellent exhibit but would need a lot of restoration work.That's assuming it still exists of course.
Above: DD11 2 in Japanese service. This is the machine that was donated to Vietnam.
Above: This is how it looked several years ago. Whether it still exists is not known.
Steam Locomotives generally used the traditional French classification system. A steam locomotive with a 2-8-2 wheel arrangement is classified as 141 class, a locomotive with 4-6-2 wheel arrangement is classified as 231 class etc. Pretty straight forward, except what did if two classes had a 2-8-2 wheel arrangement I'm not sure. It didn't happen so wasn't a problem?
Diesel locomotives have a completely dfferent clasification system.
All diesel classes start with the letter 'D' (for diesel?) then a number which I believe is related to the locomotives power output. The third character defines Electric' (E) or hydraulic (H).
e.g. D5H class = Diesel + 500 hp + hydraulic.
Again, what happens if two classes are the same I don't know.
I am still investigating pre 1975 classifications. Some are the same e.g. 141 steam class, and some are different e.g. 'BB' class instead of D9E.
Railways in Vietnam
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