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Railgarion ki Devi, Nanda Devi AC ko pranaam - Sunaina Malhotra

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Tue Nov 19 13:53:22 IST
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What is a DEMU

Info Update
Oct 18 (19:02)
Blog Post# 4462260-0     
Guest: 6cd3d7ac   Added by: ░▒▓█►─═ 𝓥 𝕂 ═─◄█▓▒^~  Oct 18 (19:04)
Briefly about DEMU:
*DEMU is a self-propelled electric vehicle/coach used for urban transport.
*The lighter Coaches faster speeds and higher load carrying capability have made DEMUs very economic and passenger popular.
*It is economical for short rake information (3-car/ 6-car, 9 –car rake).
is also advantageous for running train in either direction without changing the loco position.
*This is almost similar to EMU. In EMU the source of power is overhead electricity, whereas in case of DEMU the source of power is the diesel engine.
*In 1994- 1995 they are first introduced in Indian Railways.
The benefits obtained from DEMUs are:
 Fast and frequent service
 No need for reversal at the terminals as it can be driven from either end
 High acceleration
 Ergonomically designed coaches
 Low capital and maintenance cost
 Efficient use of rolling stock
In Indian Railways DEMUs are available both of 700 HP and 1400 HP. In addition, 9 units of DHMUs (Diesel Hydraulic Multiple Units) are also operating in SC Railways.
☆Operating Parameters of 700 HP DEMU:
•Track Gauge : 1676 mm (broad)
•Composition of unit : 1 DPC – 1 TC + 1 DTC
(DPC: Driving Power Car, TC : Trailer Car, DTC: Driving Trailer Car)
•Passenger Capacity : DPC – 79, TC/DTC – 108
•Estimated Service weight : 188 Tones
•Maximum Axle Load : 17 T (DPC), 15 T (TC/DTC)
•Wheel Arrangement : BO-Bo
•Wheel dia : 952(New), 877 mm (Fully worn), 914.5 mm (Half worn)
•Effective traction power output : 610 HP
•Transmission : Electric AC/DC
•Max operating speed : 100 KMPH
•Clearance above rail level : Minimum of 102 mm with Coaches fully Loaded and wheels fully worn
Source: PDF from Goggle.
History of Laying of tracks in Mumbai Western

★  Info Update
Oct 12 (17:12)
Blog Post# 4456348-0     
Guest: 6cd3b011   Added by: 【C】【N】【B】 【W】【A】【P】【7】^~  Oct 12 (23:03)
History of Laying of tracks in Mumbai Western Division:
Churchgate - Surat (Down & Up line)
• Surat to Valsad in 1861
• Valsad to Grant Road in 1864
• Grant Road
to Charni Road in 1868
• Charni Road to Marine Lines in 1869
• Marine Lines to Church Gate in 1870
• Churchgate to Colaba in 1896 (Closed on 31.12.1930)
Churchgate - Borivali (Down & Up Local line)
• Borivali to Grant Road in 1954
• Grant Road to Churchgate in 1974
Mumbai Central - Borivali (Fifth line)
• Mumbai Central to Bandra Terminus in 1993
• Santacruz to Borivali in 2002
Quadrupling of section between Borivali - Virar
• Vasai road – Virar in 2004
• Borivali - Vasai road in 2007
Udhna - Jalgaon (Single Line Section)
• Udhna to Vyara in 1898
• Vyara to Nardana in 1899
• Nardana to Jalgaon in 1900
• Udhna Bye-Pass line in 2004
Bilimora - Waghai (Narrow Gauge)
• Bilimora – Waghai in 1937
Source: One of the PDF in Google.(Picture Attached)
Oct 08 (10:13)

Entry# 2211     
Eloco from Ballari for 56502 and 57273^~

Oct 08 (09:54)
Blog Post# 4451710-12     
HOG WAM4 WAP1~   Added by: Eloco from Ballari for 56502 and 57273^~  Oct 08 (10:16)
1) Naming diesel locomotives based on their power output, started only in 2002. Prior to that, the last digit in the locomotive class name represented the chronological order of the introduction of the locomotive. In 2002, the naming scheme was changed to represent the output power. But the WDP1 loco and all the shunters were exempt from the naming scheme. Since the WDM6 and the WDM7 are mainly used as shunters, they were not renamed.
For example, WDM1 was a BG, mixed-use diesel loco, and the first mainline diesel loco introcduced, hence the suffix '1' at the end. Similarly, WDM2 was the second, WDM3 (NOT the present day WDM3A, WDM3 were a different class of locos homed only at Gooty in SCR)
the third, WDM4 the fourth and so on.
In that sequence, WDM6 was the 6th mixed-use mainline diesel locomotive. It was designed in the early 1980's, long before the naming scheme was changed. So it was named thus.
2) It is rated at 1350HP. They were constructed by using the YDM4 (the main metre gauge diesel loco) powerpack on BG bogies.
3) They were intended to haul short commuter trains in suburban areas along with light shunting. Hence the WDM class. However, MEMU's and DEMU's quickly came around and did the job better than these locos. So these just handle shunting jobs now.
There are quite a few 6000+ HP diesel locos in the world. Both EMD and GE produced 6000+ HP locomotives for a long time and they were operated in the US. China too has operated high powered diesel locos.
History of Indian Railways electrification

★  Info Update
Oct 07 (10:46)
Blog Post# 4451563-0     
Eloco from Ballari for 56502 and 57273^~   Added by: Eloco from Ballari for 56502 and 57273^~  Oct 07 (10:51)
History of Electrification in Indian Railways:-
The first electric train ran in India with the inauguration of services between Bombay VT and Kurla Harbour on 3rd Feb 1925 on ex-GIP Railway system. The section was electrified on 1500 Volt DC. Electric traction was subsequently extended on Central Railway upto Igatpuri on Northeast line and Pune on Southeast line where heavy gradients on the Western Ghats compelled introduction of electric traction. 1500 Volt DC traction was introduced on the Suburban section of Western Railway between Colaba and Borivili on 05.01.1928 and between Madras Beach and Tambaram of Southern Railway on 15.11.1931.Thus, before dawn of Independence, India had 388 KM of DC electrification.
the post Independence era, the work of electrification of Howrah - Burdwan section of Eastern Railway taken up on 3000 Volt DC during the Period of 1st Five year Plan was completed in 1958. As a result of the extensive research and trials in Europe, particularly in French Railways (SNCF), 25 kV AC system of traction emerged as an economical system of Electrification. Indian Railways decided in 1957 to adopt 25 kV AC system of electrification as a standard with SNCF as their consultant in the initial stages.
The first section to be electrified on 25 kV AC system was Raj Kharswan - Dongoposi of South Eastern Railway in the year 1960. with a view to provide continuity of traction system. Howrah - Burdwan section of Eastern Railway and Madras Beach - Tambaram section of Southern Railway were converted to 25 kV AC system by 1968.
Source: CORE website
Oct 06 (22:50)

Entry# 2208     
New rules for appointment of Monitors in various Monitor Forums.

Oct 06 (22:40)
Blog Post# 4451208-1     
moderator*^~   Added by: Somanko^~  Oct 06 (22:50)
1. For TL Monitor, you need to have at least about 200- 300 Confirmed Timeline Entries. Thereafter, if the TLM community accepts you, you will be appointed.
2. For PNR Monitor, you need to have about 1000 Correct PNR Predictions with good accuracy.
For News Monitor, you need to have at least about 50 News postings, and show an interest in posting more News items, tagging/editing existing News items, etc.
4. For Forum Monitor, although it is the most powerful group, most members (including relatively new members) are given one chance to prove that they can handle the responsibility with integrity. FMs are appointed for 3 week rotations, after which they must take at least a 2 week break, before being considered for another rotation. If their previous FM tenure was fine without violation of any rules, they are usually reappointed for successive 3-week rotations.
5. For FAQ Monitor, you need to show an interest in adding relevant FAQ questions to existing blogs. Currently, FAQ Monitors are usually the least important, but in the near future, many new features will make this group more prominent.
Page#    1612 FAQs  next>>

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