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Post by andrewsleigh on Sept 3, 2009 18:20:47 GMT
hi all would anybody be able to tell me who does steam upmps, suitable for 7 1/4" locos (if anybody does)
andy
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Post by dogioio on Sept 3, 2009 18:48:27 GMT
Hi Andy Try Google Southworth steam pumps Im building one for my Sweet Pea Regards Roger
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sapper
Involved Member
Posts: 73
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Post by sapper on Sept 3, 2009 20:14:34 GMT
If you would like to build your own from scratch then have a look at this site. www.nelsonslocomotive.com/Shay/shay.htmScroll down until you find the Steam pump. This is a excellent site for anyone interested in ME. Sapper
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Post by durhambuilder on Sept 3, 2009 20:31:55 GMT
Blackgates have a few (castings) in their catalogue from the southworth range, vertical weir types in 3",6" and 12" high, and horizontal duplex at 6" long and 8" long.
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steam4ian
Elder Statesman
One good turn deserves another
Posts: 2,069
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Post by steam4ian on Sept 3, 2009 21:47:57 GMT
G'day Sapper.
Thanks for the links, that pump is neat and now I have worked out how Westinghouse air pumps work. He started with a 2" dia brass bar so the design may be a bit fiddly if you scale it down for a 5" loco or 7.25 standard gauge model.
At my club there is a design which works but is not as tidy or prototypical as that example. Basically the steam end in like a conventional engine with slide valve. The valve spindle is pushed back and forth by an arm off the piston. The neat part is that the spindle is latched at either end. The arm off the piston compresses a spring at alternate ends of the spindle AND at each end of the stroke trips the latch allowing the spindle to move the valve using the force in the respective compressed spring. The blokes with this pump swear by it not at it. It is fitted to 7.25" locos and will scale down to 5" or less, hence my interest.
Water pumps in Westinhouse compressor outline are available in Oz ready made, cost a small fortune but look good
Regards Ian
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Post by andrewsleigh on Sept 3, 2009 22:01:31 GMT
Many thanks guys!
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