B-B Diesel Hydraulic
These Romanian built locomotives were constructed from 1978 to 1980. The class originally numbered 58 but only 23 were in service in 2004. It has been suggested that they were originally painted blue and white, but photos of units in blue are extremely rare, so perhaps only early units were blue. Some units appear to have been re-engined using MTU diesel engines as the original engines wore out quicker than anticipated.. They have 'SMI MTU' painted in blue on the side just behind the No 1 driver's cab. Refurbished locomotives appear to include 307, 319, 331, 339, 346, 348
They were built at the 23rd August Works in Romania and were classified as their model LD-110-M-VN2. They are used as a mixed traffic locomotive. Their diesel engine is rated at 1100 hp
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Original Colour Scheme
The image purports to show an unidentified D11H in the original colour scheme. The photo is a bit strange. The gatekeeper doesn't appear to be wearing a uniform and a military vehicle is parked on the side of the road. As the first locomotives were delivered in 1978 this could be in the very early days of reunification.
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 they 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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