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Q. What does the term "multiple unit" or "MU" mean, and what is an EMU or DMU?

There are two senses of the phrase "multiple unit" to be distinguished. Two or more regular locomotives may be coupled together for greater hauling capacity. In such a cases the locos are said to be operating as multiple units, or to be "MU'ed together" (US terminology: "lash-up").

This is not to be confused with the terms electric multiple unit (EMU) or diesel multiple unit (DMU) which refer to cars used for (mostly suburban) train services which have multiple prime movers (either electric motors or diesel engines) for each car. I.e., the same car that carries passengers also has the motive power, as opposed to the normal situation where the passengers are in coaches that are not self-propelling and a locomotive hauls the train.
 
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RISING SUN said:
By the looks 2nd pic looks like DMU. I dont know how are you saying that they will change their diesel locos with EMUs which stands for electric multiple units. We have DMUs in Delhi,Mumbai in lesser no of routes which are very efficient but that routes are not main routes. Pakistan should go for 10-12 car DMU sets.
Click to expand...

No it is an EMU
BEML rolls out India’s First Stainless Steel EMU! « MRVC Mania – MRVC rakes & more!

RISING SUN said:
By the looks 2nd pic looks like DMU. I dont know how are you saying that they will change their diesel locos with EMUs which stands for electric multiple units. We have DMUs in Delhi,Mumbai in lesser no of routes which are very efficient but that routes are not main routes. Pakistan should go for 10-12 car DMU sets.
Click to expand...

11wspec2.jpg
 
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gslv mk3 said:
No it is an EMU
BEML rolls out India’s First Stainless Steel EMU! « MRVC Mania – MRVC rakes & more!



11wspec2.jpg
Click to expand...
My bad,sorry. I wanted to say same but in hurry I said looks like DMU instead of EMU. If you read whole post you will get the sense.

1 of my favorite DMUs here.
http://www.irfca.org/gallery/Suburban/DMU/rajdhani_livery_dmu_delhi_jn_dec03_vikas.jpg.html

Controls
http://www.irfca.org/gallery/Suburban/DMU/Interior_of_a_DEMU_at_the_ajmer_carriage_workshop_the_DEMU_was_stationed_there_for_repainting_photography_was_prohibited_but_i_m.html
http://www.irfca.org/gallery/Suburban/DMU/Other_side_of_the_DEMU_interior.jpg.html
 
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IRFCA - The Indian Railways Fan Club Photo Gallery - Picture_107s.jpg
IRFCA - The Indian Railways Fan Club Photo Gallery - S_Video_2004_01_29_18_06_04h_1.jpg
IRFCA - The Indian Railways Fan Club Photo Gallery - dmu002.jpg
IRFCA - The Indian Railways Fan Club Photo Gallery - IMG_0165.jpg

http://www.irfca.org/gallery/Suburban/DMU/DSCN0218.jpg.html
http://www.irfca.org/gallery/Suburban/DMU/2004_0104Image0026.jpg.html
http://www.irfca.org/gallery/Suburban/DMU/demu.jpg.html
http://www.irfca.org/gallery/Suburban/DMU/DSCN2411.jpg.html
http://www.irfca.org/gallery/Suburban/DMU/DHMU_SC.jpg.html
http://www.irfca.org/gallery/Suburban/DMU/a8e0.jpg.html
 
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A new aerodynamically shaped DEMU model from ICF has been brought into service on the SCR (Bhimavaram - Narsapur - Vijayawada). The leading driving motor cars of these 8-car rakes have a distinctive appearance with a large sloping oval windshield in one piece and can accommodate 54 passengers; the rear motor car accommodates 72. The other six trailer cars of a rake accommodate 84 seated passengers and 240 standing passengers each.
 
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High-Power DMU (High Horsepower DMU): Newer DMU models (the High Powered DMU or HPDMU units, with a 1400hp V-16 engine (Cummins KV-16)) were introduced in 1999 by ICF and are now in regular use at several places. The HPDMUs are coupled in 4-car units (one power car + three trailer cars) as opposed to the 3-car rakes (power car + two trailer cars) for the lower-powered DMUs, and have pneumatic secondary suspension. Acceleration is improved, at 0.54m/s2. A 4-car unit carries 1092 passengers.

The HPDMUs were used around Bangalore at first, and some suburban services around Chennai (Beach - Kanchipuram). Some sections on NR have also been considered. The first HPDMU units underwent trials at Whitefield near Bangalore in 2000. One HPDMU rake was later in trial operation between Madras and Sulurpet, while another could be seen running in trials between Madras and Arakkonam. Note: Sometimes these are referred to by the acronyms HHPDMU or HHPDEMU (" High Horse-power DMU/DEMU"). The max. speed for most of these DMU/DEMU/DHMU vehicles is 105km/h.

The HPDMUs have been seen with road numbers in the 14xxx and 15xxx ranges. SCR's new aerodynamic DEMU coaches have 150xx numbers for power cars and 154xx for trailer cars [4/05].
 
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Class S11 India made Loco used in Srilanka:
 
Last edited by a moderator:
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I have a question:

These engines that India is offering to Pakistan; were they manufactured in India??

The reason I'm asking is because I read in one of the news articles recently that the locomotives India is offering was bought from an American company several decades ago & that company closed 26 years ago over quality concerns.

Is this True?
 
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Baazi said:
I have a question:

These engines that India is offering to Pakistan; were they manufactured in India??

The reason I'm asking is because I read in one of the news articles recently that the locomotives India is offering was bought from an American company several decades ago & that company closed 26 years ago over quality concerns.

Is this True?
Click to expand...
Indian railways back in 50s and 60s imported GM,ALCO made locos(diesel).

After the closure of Alco's Schenectady works, locomotives to Alco designs continued to be manufactured in Canada by Montreal Locomotive Works, and in Australia by A. E. Goodwin. In addition, Alco-derived locomotives form the major chunk of diesel power on the Indian Railways. Many thousands of locomotives with Alco lineage are in regular mainline use everywhere in India and around 100 new locos are added every year.
Click to expand...

American Locomotive Company - Wikipedia, the free encyclopedia

Locomotives in India - Wikipedia, the free encyclopedia
 
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