Originally Posted by skoul14

How commmon is the use of bottom unloading type BOBR/ BOBRN wagons in India?

By use of these Wagons , we can directly discharge material on apron feeder / other equipment but what is the limiting factor for use of these Wagons? Is avialaibilty an issue?

"How common..." and "...availability issue" are just about the same thing in my book. But deeper in: if you have to ask then either you have been looking in the wrong place or the questions answer themselves.

Whatever BOBR/BOBRN means to the average bulk handling specialist is confusing at best. Whatever. If they can reliably discharge material downwards it just boils down to how big are the lumps and what is the drop. Limiting factors are nothing to do with the rolling stock in question(s).

As usual we are presented with one line questions looking for chapter and verse answers. Nobody can give advice on this topic without knowing the material; its lump spectrum; the drop height and rather importantly the receiving device. In the meantime it should be possible to find out how many such cars are available by asking the appropriate Indian rail service providers since you do not appear prepared to manufacture your own.

Always ready to help a good cause! ■

Originally Posted by skoul14

How common is the use of bottom unloading type BOBR/ BOBRN wagons in India?

By use of these wagons, we can directly discharge material on apron feeder/other equipment

but what is the limiting factor for use of these Wagons? Is avialaibilty an issue?

Originally Posted by johngateley

"How common..." and "...availability issue" are just about the same thing in my book. But deeper in: if you have to ask then either you have been looking in the wrong place or the questions answer themselves.

Whatever BOBR/BOBRN means to the average bulk handling specialist is confusing at best. Whatever. If they can reliably discharge material downwards it just boils down to how big are the lumps and what is the drop. Limiting factors are nothing to do with the rolling stock in question(s).

As usual we are presented with one line questions looking for chapter and verse answers. Nobody can give advice on this topic without knowing the material; its lump spectrum; the drop height and rather importantly the receiving device. In the meantime it should be possible to find out how many such cars are available by asking the appropriate Indian rail service providers since you do not appear prepared to manufacture your own.

Always ready to help a good cause!

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Adding further to Johns excellent examination of the subject:

It sounds as if you know little of the subject and are examining the

profitability of an enterprise involving the movement of Asian coals.

You have to help us to help us help you!!

The Railway agency in India will be the best source of this information as

they are the ones that regulate the construction standards with regard to the

loaded and light weight of these cars.

Do not expect a free answer for a blanket question that requires the retaining of

a qualified, licensed, insured and government regulated engineering concern. ■

Hello,

For formal information, better you contact Indian railways concerned department, may be RDSO.

Following is the information, as I have inferred from the requirement of installations for wagon tipplers, installation for bottom discharge wagons and general observations.

1) Bulk material is mostly transported by BOX type wagons, which can be unloaded by wagon tipplers. The material so transported can not be pilfered because gravity does not assist such thing, rather gravity is opposing it; to unload material from aforesaid wagons.

Such transport is also accident-proof, because material can not spill along rail track of common use, by mistake or mischief. This is essential for safety of on-going passenger trains and goods trains.

2) The bottom discharge wagons are mostly used for transport of material in captive zone i.e. for power station at mine head, etc. If used along general track, any flow-out from bottom (due to mechanical failure, mistake or sabotage) can be hazardous to public and can cause accident for the subsequent trains. Also retrieving / cleaning such material along track will be very inconvenient activity, creating serious disturbance to railway traffic.

However, I have seen bottom discharge wagons being used by railway for transporting ballast needed for strengthening the rail track as a regular upkeep or repair work after flood or for laying new tracks, because in such cases they have no other option. The mechanised unloading from BOX type wagons is impossible at such odd places. It is obvious that railway will be taking particular care while transporting their material by bottom discharge wagons.

Well, specific information from concerned people (railway or plant engineers who have dealt with the railway about the choice of wagons), is welcome.

It is possible that in some countries, the bulk material transport by bottom discharge wagons could be more, because it is less of technical and more of perception and other reasons.

Regards,

Ishwar G. Mulani

Author of Book: ‘Engineering Science And Application Design For Belt Conveyors’. Conveyor design basis ISO (thereby book is helpful to design conveyors as per national standards of most of the countries across world). New print Nov., 2012.

Author of Book: ‘Belt Feeder Design And Hopper Bin Silo’

Advisor / Consultant for Bulk Material Handling System & Issues.

Pune, India. Tel.: 0091 (0)20 25871916

Email: conveyor.ishwar.mulani@gmail.com

Website: www.conveyor.ishwarmulani.com ■

....of this section of the forum please try to speak English and explain what is meant by....

Originally Posted by skoul14

How commmon is the use of bottom unloading type BOBR/ BOBRN wagons in India? ..

While you're at it also translate RDSO! Otherwise please address your questions to a more appropriate website which has a more partisan focus (Even those do try to use an understandable form of English.) There is an excellent German section hereabouts because the experts there are rather able to handle their own affairs and after all these forums originated from Germany. If some participants have difficulty with the German language that should not be taken as an excuse to pollute the English language.

Thank you. ■

Originally Posted by Roland Heilmann

Dear English Readers,

RDSO is the Research Design and Standards Organisation, a research and development organisation under the Ministry of Railways of India.

BOBR means Bogie Open Bottom Rapid discharge railway wagon.

BOBRN is BOBR with pNeumatic door opening actuators.

Doesn't seem German to me ;-)

Regards

R.

Hi Roland,

Thanks on behalf of most anglophiles. Reference to the German forums was made because the forums have a German origin and therefore perfectly entitled to use your language. My grouse is that acronyms are the downfall of most languages. Are we really expected to know the workings of the Ministry of Railways of India? MRI stands for a large bus operator in Indonesia. BOBR - now what has the bogie got to do with the open bottom rapid: especially if the assumed intended objective 'discharge' is missing?

No, it doesn't seem German to me either. Greek yes, Double Dutch maybe but German no.

PS. Is there a German equivalent of anglophile? ■

Originally Posted by johngateley

Hi Roland,

Thanks on behalf of most anglophiles. Reference to the German forums was made because the forums have a German origin and therefore perfectly entitled to use your language. My grouse is that acronyms are the downfall of most languages. Are we really expected to know the workings of the Ministry of Railways of India? MRI stands for a large bus operator in Indonesia. BOBR - now what has the bogie got to do with the open bottom rapid: especially if the assumed intended objective 'discharge' is missing?

No, it doesn't seem German to me either. Greek yes, Double Dutch maybe but German no.

PS. Is there a German equivalent of anglophile?

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I should be insulted John but I wont be because we have know each other too long HAHA.

A bogie is equivalent to a railroad truck being two three or four axles in the case of diesel electric locomotives like the old DD40X Union Pacific freight locomotives.

I think he means the numerous belly dump doors on open top hopper cars. ■