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Posted: Mon May 12, 2008 3:19 pm Post subject: Stuart Score - fourth run
A week yesterday, I tried my new Maccsteam burner in my Stuart Score plant, and it all worked rather better than it had done before, although I still think that I need more steam to produce as much electricity as I need.
Joined: 23 Jun 2007 Posts: 2176 Location: Vienna, Austria
Posted: Mon May 12, 2008 6:25 pm Post subject:
... great video, James! Gosh, the Stuart is one great machine - puts all of mine well in their place ... I really like the new firebox door! _________________ Says Tom
... keine Wunder sind vollbracht.
No miracles ... yet.
... great video, James! Gosh, the Stuart is one great machine - puts all of mine well in their place ... I really like the new firebox door!
I'm glad that you like it: the door was my father's design, actually - it is very useful, though, at not wasting heat. I shall paint it black this week, hopefully. _________________ James E. Petts
Joined: 27 Oct 2006 Posts: 5098 Location: Pensford Somerset
Posted: Sat May 17, 2008 9:25 pm Post subject:
Not a generating plant this time. I mean more of a portable power plant that can be belted up to anything.
I have designed a generating plant using my 504 boiler and 2 D10s direct drive to stepper motors. But after seeing your experiance with the Score and the 504 boiler it wouldnt keep up with steam demand _________________ www.steamyjim.piczo.com www.whitchurchlightrailway.piczo.com
Not a generating plant this time. I mean more of a portable power plant that can be belted up to anything.
Ahh, I see what you mean! That should be interesting - I should love to see a video and/or pictures of it!
Quote:
I have designed a generating plant using my 504 boiler and 2 D10s direct drive to stepper motors. But after seeing your experiance with the Score and the 504 boiler it wouldnt keep up with steam demand
Ahh, yes: the 504 can only just about cope with the Score (which is a horizontal D10), and then not at maximum speed, so two D10s will be too much for it. You could try a Stuart HB6, which is quite a large and powerful boiler, although it is also rather expensive.
Would you not be better off with one larger engine, rather than two smaller engines? A Stuart Sirius, for instance, is a 1" bore x 1" stroke engine (larger than the D10's 3/4" x 3/4"), and its enclosed crankcase makes it more suitable for high speed running. Note that that model is only available as unmachined castings, however. Alternatively, the Stuart no. 9, a large single cylinder engine, would run well from the HB6, and would easily drive, say, a car alternator.
Incidentally, stepper motors are not really what you want for any significant application, since, although they generate much voltage, they cannot tolerate a high current drain. I am using a fairly large motor originally designed for model boats, which can easily cope with a 3 ampere current (if it is given enough mechanical power, of course!).
Joined: 27 Oct 2006 Posts: 5098 Location: Pensford Somerset
Posted: Sat May 17, 2008 9:46 pm Post subject:
jamespetts wrote:
steamyjim wrote:
Not a generating plant this time. I mean more of a portable power plant that can be belted up to anything.
Ahh, I see what you mean! That should be interesting - I should love to see a video and/or pictures of it!
Quote:
I have designed a generating plant using my 504 boiler and 2 D10s direct drive to stepper motors. But after seeing your experiance with the Score and the 504 boiler it wouldnt keep up with steam demand
Ahh, yes: the 504 can only just about cope with the Score (which is a horizontal D10), and then not at maximum speed, so two D10s will be too much for it. You could try a Stuart HB6, which is quite a large and powerful boiler, although it is also rather expensive.
Would you not be better off with one larger engine, rather than two smaller engines? A Stuart Sirius, for instance, is a 1" bore x 1" stroke engine (larger than the D10's 3/4" x 3/4"), and its enclosed crankcase makes it more suitable for high speed running. Note that that model is only available as unmachined castings, however. Alternatively, the Stuart no. 9, a large single cylinder engine, would run well from the HB6, and would easily drive, say, a car alternator.
Incidentally, stepper motors are not really what you want for any significant application, since, although they generate much voltage, they cannot tolerate a high current drain. I am using a fairly large motor originally designed for model boats, which can easily cope with a 3 ampere current (if it is given enough mechanical power, of course!).
I have a unmachined set of castings for a NO 9 with boiler feed pump and govener that my grandad had about 40 years ago so i shall look into that!
Do! The governor should be useful, as, if you use one, you will not need a voltage regulator, the use of which reduces efficiency. _________________ James E. Petts
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Gosh, the Stuart is one great machine - puts all of mine well in their place ... I really like the new firebox door! 
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