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| jamespetts |
Stuart Score - fourth runA 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.A video of the run: (See here if embedding does not work). Photographs: The new firebox door: 
Burner re-positioned: 
Inside the firebox: 
Engine running: 
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| toxx |
... 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!
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| jamespetts |
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. |
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| steamyjim |
Seems to be running a lot better now!
Needs a bit more running in maybe? I should get my Stuarts running
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| jamespetts |
You should indeed get your Stuarts running - and video them! Stuart models really are quite special. |
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| steamyman |
great setup you've got there. 
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| Les Marsh |
Great set up and also very nice to see it running.
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| steamyjim |
I'm going to build a power plant out of one of my Stuart 10Vs and one of my no500 boilers to power workshops etc
Need a boiler feed pump though |
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| jamespetts |
Very interesting! What did you plan to use for a generator? |
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| steamyjim |
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 
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| jamespetts |
Ahh, I see what you mean! That should be interesting - I should love to see a video and/or pictures of it!
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!). |
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| steamyjim |
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! |
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| jamespetts |
Do! The governor should be useful, as, if you use one, you will not need a voltage regulator, the use of which reduces efficiency. |
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| steamyjim |
The NO9 will not work (at speeds required) with a 504 though will it 
I'd quite like to lash 2 504s together like the one on ebay recently 
I'm trying to think of what other boilers I have
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| jamespetts |
Ahh, no: a 504 is not enough. You'd need an HB6 or something of equivalent steam production capacity.
That could work, but using a single larger boiler would be easier. |
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| tmuir |
Well its taken you a few goes and a second burner but it looks like you have it just about all figured out now.
With our toy engines we just think 'Put some water in the boiler and a fire beneath and all will be good' but the more advanced models shows there is much more to it than just that. |
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| steamyjim |
Hmmmm what to do. I cant realy justify spending that much on a boiler. I shall have to wait for something to come along in that case. I might have a look through Model Engineer and other books for some plans for boilers |
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| jamespetts |
Multiple boilers could work if you can't afford a single large one, but it'd be harder to set up and run.
This might make sense, although I'm sure that you know the certification rules and that, if you wanted to run it in public, a boiler inspector might have to watch you build the thing... |
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| steamyjim |
Aye, i've had experiance with double boilers
I shall ask Cheddar Valley Steam if they have any plans for suitable boilers aswell
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| jamespetts |
Do! Very best wishes with your project! |
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| steamyjim |
Thanks! |