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Chatlier water cylinder brake
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 Posted: Tue Jun 7th, 2016 03:03 pm
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Herb Kephart
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Recently, I acquired a bunch of Baldwin Locomotive works magazines/booklets. Not a complete set, they are from the mid-teens to 1930, and each seems to have a ''theme''. They were probably sent to prospective, or actual customers-- the ones that I have seem to have come from G. F. Endicott, Mechanical Engineer, Northern Pacific RY. Co.

The January '28 edition, covers ''Motive Power Development on the Denver & Rio Grande Western RR''

It would seem that most, if not all locos of theirs up to the C-28 (2-8-0) and T-18 (4-6-0) were fitted with the '' Chatelier cylinder water brake'' -- including the 1873 Fairlie, from England. Never hearing of this, I did a search, and came up with this interesting piece---http://www.trainweb.org/utahrails/drgw/waterbrake.html
Running 1½ steam (4-8-4) I have sometimes substituted a wisp of throttle with a couple notches of reverse, for otherwise inadequate brakes, coming into a station, for example, and a steam car (MUCH more difficult to operate than a loco) can be stopped in an emergency the same way--IF this action doesn't tear the wood spokes out of the rear wheels--which will cause stoppage in a far less elegant manor. A ''safety valve'' with a loco is that the drivers will slip backwards--that is if you don't blow a cylinder head off.

In any event--I found the link, interesting--a few of you might also.


Herb





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 Posted: Tue Jun 7th, 2016 10:52 pm
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Salada
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Was this stuff published on April 1st by any chance ?

It sounds highly unlikely to me, though I can see how in theory it could work by trying to absorb the kinetic energy of the train by using the steam cylinders as compressors. It is an early attempt at exactly what modern dynamic braking does (where the diesel-electric loco electrics are "reversed" so as to generate current that is then dumped into a heat sink). 

Any attempt at making a realistically useful brake application by trying to absorb a useful amount of kinetic energy from a train weighing many hundreds of tons, or more, without a simultaneous proper Westinghouse application, would cause severe mechanical damage to the loco & could derail the leading cars.

Maybe I could try it some time ?  -- No way !!.

Regards,            Michael

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 Posted: Wed Jun 8th, 2016 01:33 am
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W C Greene
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Does the name Rube Goldberg appear anywhere?

Troublemaker



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 Posted: Wed Jun 8th, 2016 06:50 am
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Helmut
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No way for Rube Goldberg. At a time it was widely used. And the Riggenbach brake used on rack and mountain locos, is in principle the same - using compressed air instead

Last edited on Wed Jun 8th, 2016 06:53 am by Helmut



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 Posted: Wed Jun 8th, 2016 06:14 pm
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Herb Kephart
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No Rube Goldberg. No April first. No BS. And yes, I was sober when I read it.  Should be more effective with water flashing into higher pressure steam, than with compressed air--but air would be much more controllable and less prone to damage, than water, I would think. Had to work for a while, or the RR wouldn't be installing, or specifying the things. Like compounding (in this country), thought not worth the maintenance, etc.

Helmut--thanks for concurring !


Herb



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 Posted: Wed Jun 8th, 2016 09:28 pm
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Salada
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Amazing what you can learn courtesy of FR. Thanks to Herb & Helmut but I still wouldn't fancy using it myself.

Regards,               Michael

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 Posted: Thu Jun 9th, 2016 07:13 am
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Helmut
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IIRC, M. Henri-Louis le Chatelier was a famous professor of chemistry ( and railway buff ) and the "Le Chatelier-Braun" principle of chemistry is named after him - the latter being one of his more successful findings.



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 Posted: Wed Sep 7th, 2016 03:03 pm
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Nice Guy Eddie
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Any one know if that dog with the cigar speaks English ?

Have a bone Bud !

I checked out this Thread & it's fine to add NEW Posts to it



What the hell is a water brake anyway ?

:f:

Eddie



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 Posted: Thu Sep 8th, 2016 12:30 am
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W C Greene
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Well, Eddie...it's a brake made of water! You silly boy...

WCG



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 Posted: Thu Sep 8th, 2016 02:56 pm
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Herb Kephart
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Adding a whole lot of water to a working steam engine will BRAKE the cylinder heads from hydraulic lock.

Understand now?


Herb



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