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Page#    1672 FAQs  <<prev  next>>
Oct 08 (10:51)

Entry# 2295     
What are the factors (both technical and operational) that affect the average speed of passenger and goods trains?

★  General Travel
Oct 08 (10:50)
Blog Post# 4737991-0     
KarthikCG^~   Added by: KarthikCG^~  Oct 08 (10:51)
Question: What are the factors (both technical and operational) that affect the average speed of passenger and goods trains?

Answer: A train runs a 100 km line at 50 kmph. If we neglect accelerating and decelerating time, we have time of the journey 2 hrs. But if the train must stop somewhere en route for to give way to another train (eg. on a single track line) , it must stop for 6 minutes (0.1 hrs). Then (again neglecting accelerating and decelerating time) we have real speed 100/2.1=47.62 kmph. Increasing the top
speed twice to 100 kmph changes the theoretical time to 1 hr and real time to 1.1 hrs so the real speed is 100/1.1 = 90.91 km - not twice as much.
In the real world we may have more stops, longer stops but also top speed not improved so much, some tracks that cannot be upgraded to high speeds (too steep slopes, too tight bends etc.). Then, much of the higher top speed is "eaten" by the remaining factors.

Answered by: Przemyslaw Kowalik from Lublin University of Technology

Sep 29 (14:12)

Entry# 2294     
11 Digit Wagon Numbering System

★  Info Update
Sep 29 (13:21)
Blog Post# 4728267-0     
tanu1995^~   Added by: tanu1995^~  Sep 29 (14:12)
What is 11 Digit Wagon Numbering System?

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Sep 28 (23:00)
Coach Construction/Seating Arrangements

Entry# 2293     
What is Coach Numbering?

★★  Info Update
Sep 28 (22:01)
Blog Post# 4727913-0     
tanu1995^~   Added by: tanu1995^~  Sep 28 (23:00)
Let us know about The Coach Numbering ☺

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Sep 28 (16:51)
Coach Construction/Seating Arrangements

Entry# 2292     
Classification of Coach in Indian Railways

★  Info Update
Sep 28 (14:16)
Blog Post# 4727480-0     
tanu1995^~   Added by: tanu1995^~  Sep 28 (16:51)
Classification of Coach in Indian Railways 🙂

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Sep 24 (17:00)

Entry# 2283     
Which were the earliest diesel locomotives in the Indian subcontinent?

★  Info Update
Sep 24 (16:55)
Blog Post# 4724197-0     
Amogh^~   Added by: Amogh^~  Sep 24 (17:00)
Which were the earliest diesel locomotives in the Indian subcontinent?

In 1915, a 2'6" gauge diesel loco was supplied to the India Office by Avonside (Bristol). This is presumed to have worked on some tea plantation in Assam.

1921, a 2'0" gauge 0-4-0 diesel loco built by Baugleys of Burton-on-Trent was delivered to Bengal.

In 1923, two diesel locos built by Ruton Proctor of Lincoln were used on the Barsi Light Railway.

In 1929, a 2'0" gauge 0-4-0 diesel loco was supplied by Maffei (Germany) to C K Andrew, London, for delivery to India. Their ultimate use and disposition in India is not known.

Two 420hp (or 350hp?) dual-cab BG diesel shunters from William Beardmore (with electrical components from GEC) were used by the North-Western Railway (now in Pakistan) in 1930.

In 1934, an Armstrong-Whitworth diesel-electric railcar was delivered to NWR for use on the 2'6" Kalka-Simla.

In 1935, two 1200hp BG diesel-electric locos with 8-cylinder Armstrong-Sulzer engines, built by Armstrong-Whitworth, were obtained by NWR for trials on the Karachi-Lahore line in preparation for a proposed new Karachi-Bombay route. They had a 1A-C-2 wheel arrangement. None of these experiments proved successful and the locos were in all cases withdrawn very soon.

Ceylon Government Railways obtained one diesel-electric shunter and two diesel-electric mixed traffic locos in 1934 from Armstrong Whitworth. The two mixed traffic locos were actually made for the Indian State Railways (as they were then known) but turned out to be of too low a power for their requirements and were sold to CGR. These proved unsuitable and were sent to Argentina in 1937, and ultimately scrapped soon thereafter.

Between 1930 and 1940, various Indian industrial concerns obtained 14 diesel locos. Bagnall in conjunction with Duetz supplied a 4-speed 22-25hp diesel loco (Duetz PM 2117 design) in 1934 to Bundla Beta Tea Co., Assam for the Pengarie-Digboi trolley line. It had a top speed of about 15km/h. In 1936, BBCI obtained one diesel-electric shunter from Armstrong-Whitworth which survived into the 1950's. In 1940, the Jamnagar and Dwarka Railway obtained one MG diesel from Brookville (USA).

In the mid-1930s, the Nizam's State Railways obtained a few diesel railcars from Ganz. These were in use until the 1950s or so. Ganz supplied NWR in 1939-40 with some diesel railcars as well. Some of these were allocated to India when NWR assets were split following the partition of British India.

In 1944-45, the USATC supplied 15 GE-built BG Bo-Bo diesel locos with Caterpillar engines to WR. These were mid-cab machines with short and narrow hoods on either side. Several of these were working until about 1990, when they were withdrawn and scrapped. One is preserved at the Diesel Loco Works, Varanasi.

In 1949, a few MG diesel-mechanical locos built by Fowler were imported by IR for use in the arid regions of Saurashtra. One of these is preserved at the National Rail Museum, New Delhi. In 1955, 20 'DY' diesels by North British were imported for use, also in Saurashtra (MG). The locos of the second batch were reclassified as YDM-1's.

Source: IRFCA
Page#    1672 FAQs  <<prev  next>>

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