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What is the basic difference between ICF & LHB coaches?  
5 Answers
Apr 18 2012 (17:05)
Coach Construction/Seating Arrangements

Entry# 1103     
Charm Totally Vanished*^~
What is the basic difference between ICF & LHB coaches?

Apr 15 2013 (17:05)
Blog Post# 560538-105     
दक्षिण मध्य रेल राही   Added by: VijayAditya*~  Apr 16 2013 (22:11)
There is absolutely no doubt in saying that ICF coaches have been the backbone to the back bone of India-The Indian Railways. They have effortlessly (not in all cases) hauled tens of billions of people relentlessly every year. To know further about ICF,LHB or even locos for that matter we need to be clear on what a few terms mean, where are those parts located and what is their use. I am sure most of us here in IRI must be familiar about them but my idea
is to share knowledge to people who don’t know about them yet. So here we go with what I think would be a detailed understanding (might go kaput too, Technical writing in freestyle is not easy):
We daily see a lot of trains zipping past at full speed, be it directly or through videos of Harris Kiran or the vast multitude of highly passionate and talented people here. Anyway, the point is when the train is moving fast, like really fast is there any stress? If there is stress where is it concentrated? And why stress needs to be relieved?
Well, technically speaking there are lot of shocks and stress acting on the train while it is moving (varies with speed, curves, gradients, Tractive effort, deceleration and other small factors), this stress is exerted on it from all three axes-vertical, longitudinal and lateral. Our idea is to successfully relieve all stresses on the coach to the rail while it is continuously in contact while in motion. But merely being in contact with the rail doesn’t mean the stresses would be relieved through the wheels to the rail. Hence the arrangement of the wheels, axles, buffers, Bolsters, Primary and secondary suspensions, Bearing arrangement and a strong frame. If the stress is not relieved or not equally distributed there are two major results.
1. Ride Index would go Higher
2. Axles may go Hot, frame may give away, more frequent IOH/POH intervals-Basically safety concern.

Apr 15 2013 (17:16)
Blog Post# 560538-106     
दक्षिण मध्य रेल राही   Added by: VijayAditya*~  Apr 16 2013 (22:12)
Oh btw, Ride index is a variable which details the comfort a human would experience while in motion. In technical terms it can be described as the function of amplitude of acceleration and frequency of oscillation. Ride index is measured on a scale of 5, 0 being the smoothest and most comfortable ride while 5 is the most horrible one. Quite a complex one at that, i tried putting some random variables and solving it but didnt really work out. Indian Railway Employees dont get paid for nothing after all.They are good at this stuff :)
the coach UnderGear arrangement should be such that all accumulated stress has to be distributed / shared. Coming to the Basic part, two wheels are connected with a rod which is the axle, so an axle has two wheels to it one at each end. Each axle has an axle joint and the primary suspension(springs at axles) is based on it which absorbs a part of the vertical shocks.
A pair of axles(4 wheels) are grouped by a frame mounted over it, this frame with two axles is together called a BOGIE. There are two such bogies under a coach which are grouped by the base of the coach, fitting exactly in the required places. The secondary suspension is also on the bogies, which again help dampen the vertical oscillations. Longitudinal shocks are absorbed by the Buffers at coach ends and the stress is transferred to the coach and finally to the rails through wheels.
So Primary and secondary suspensions take care of the Vertical Shocks while Coach end buffers absorb the longitudinal shocks and transfer them to the rail through frame..
There is however one more aspect, the lateral stress or the side-side oscillatory motion which we feel in ICF coaches which is the twist of the story, ICF coaches are not really great dampers of the Yaw Forces(side-side) which makes the RIDE INDEX of ICF coaches reaches upto 3.5

Apr 18 2012 (16:58)
Blog Post# 400464-7     
Soumitra Chawathe*^~   Added by: Charm Totally Vanished*^~  Apr 18 2012 (17:05)
ICF coaches are manufactured in India, the normal ones found in mail/express trains
LHB stands for Linke Hoffman Busch, a German Company who has granted rights to RCF through a technology transfer agreement to manufacture coaches based on their design (Alstom LHB) in India itself
Advantages of LHB:
2. Light weight
3. Less chances of accidents

Aug 23 2011 (01:07)
Blog Post# 225063-9     
D Pravin   Added by: Railfan Z*^  Dec 18 2013 (14:18)
@Pradyu విశాఖపట్టణం**: Re# 225063-8
Increased seating capacity of LHB coaches.

Aug 23 2011 (01:12)
Blog Post# 225063-11     
D Pravin   Added by: Railfan Z*^  Dec 18 2013 (14:17)
@Pradyu విశాఖపట్టణం**: Re# 225063-10
The LHB coaches are approximately 2.2m longer than the standard ICF Coaches Which Provides two additional rows for the chair cars, one additional sleeping bay for the AC sleeper coaches.
ICF coaches LHB coaches
Length over Body 21.77m 23.54m
Length over Buffers 22.28m 24.70m
Width of Body 3.245m 3.240m
Inside width 3.065m 3.120m
Windows 1.220m x 0.610m 1.180m x 0.760m
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