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Old 25-02-18, 11:11 PM   #31
nickh
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(snip) boils after about 20 mins
Looking to add a small tank or rad, don't you just love the random collection of threads model engineers seem to use - top water connection is 3/8" x 24 TPI i.e. UNF while the bottom looks to be 5/16" x 32 TPI which I think is an ME thread!

NHH
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Old 25-02-18, 11:31 PM   #32
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As in Newcomen?

Sort of, but instead of steam being condensed it is the hot products of combustion cooling which produces the low pressure.

NHH
That's the one, I've seen a replica of one at my local museum (Black Country living museum)

Stuart.
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Old 25-02-18, 11:41 PM   #33
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Somewhere I really must visit.

NHH
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Old 25-02-18, 11:48 PM   #34
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Great place; you need more than a day.
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Old 04-04-18, 12:08 PM   #35
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Looking to add a small tank or rad, don't you just love the random collection of threads model engineers seem to use - top water connection is 3/8" x 24 TPI i.e. UNF while the bottom looks to be 5/16" x 32 TPI which I think is an ME thread.

NHH
Or Schrader valve apparently.

EDIT; Or not - most sources quote Schrader thread as 0.305 x 32 TPI, i.e. 7 1/2 thou smaller diameter!



NHH

Last edited by nickh; 04-04-18 at 04:04 PM.
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Old 09-10-18, 09:06 PM   #36
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Found a suitable tank so soldered in a couple of fittings, made up adaptors for top and bottom threads. Just the nipples to solder on to top pipe and hopefully it'll all hold water.

NHH
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Old 28-10-18, 10:15 PM   #37
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Does hold water and had a good run of over 45 minutes without boiling.




NHH

Last edited by nickh; 28-10-18 at 10:30 PM. Reason: add vidio
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