Stewart S50 Name

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Stewart S50 Name

This topic has 12 replies, 6 voices, and was last updated 13 January 2022 at 18:57 by Former Member.

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13 January 2022 at 11:28 #11091
John Gray 7
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@johngray7
Where does the name come from ?
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13 January 2022 at 11:28 #580211
John Gray 7
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@johngray7
I’ve just started my first steam engine, a Stewart S50. Very early days yet, but it’s going well (I think). As with all new projects time at the lathe/mill is only a small percentage of the actual time spent….Thinking time, weighing up, call it what you like. I imagine this percentage changes with time and gained experience, il look forward to that. Anyway, one of my random thoughts the other day made me ponder where does the name come from? The Stewart 10V, I can see that the “V” would indicate that it’s a vertical build, and there were others, so probably the 10 was it’s time place so to speak. The S of S50 could indicate a stationary engine, but surely there aren’t 49 predecessor’s, are there?
13 January 2022 at 12:09 #580215
Former Member
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@formermember12892
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13 January 2022 at 12:09 #580216
Former Member
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@formermember12892
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13 January 2022 at 12:53 #580226
JasonB
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@jasonb
For a start it is Stuart not Stewart!

The S50 was the replacement for the slide valve horizontal progress and they distinguished between the slide valve and oscillating progress engines by using "S" for slide and "O" for oscillating so that is most likely where the "S" came from.

I think the 800 gas engine is the highest number off the top of my head so not sure where the 50 came from and they also have quite a few that are just names, or letters such as the Lightweight or BB.

Good history of the various engines to be found here
13 January 2022 at 15:48 #580240
Former Member
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@formermember12892
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13 January 2022 at 17:01 #580253
Peter Cook 6
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@petercook6
Posted by John Gray 7 on 13/01/2022 11:28:39:

…time at the lathe/mill is only a small percentage of the actual time spent….Thinking time, weighing up, call it what you like. I imagine this percentage changes with time and gained experience,

sorry Nope – Not in my experience. Time and experience getting the mill and lathe to do what you want grows far faster than the creative thinking and planning – you are always thinking of new things – so over time mill and lathe time shrinks as a percentage of the project.

However on the bright side total project time shrinks so you get more projects done.
13 January 2022 at 17:42 #580256
John Gray 7
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@johngray7
Thanks for the replies. Seems likely then that the S was more to do with the slide valve construction and not indicating a stationary engine. Interesting info on the link about the Stuart engines, and apologies to anyone offended by my spelling issues.
13 January 2022 at 17:47 #580257
Former Member
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@formermember12892
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13 January 2022 at 17:49 #580258
Dave Halford
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@davehalford22513
These were originally supplied ready machined just needing a screwdriver, a spanner and pliers
13 January 2022 at 17:56 #580259
Former Member
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@formermember12892
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13 January 2022 at 18:52 #580263
Zan
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@zan
Just a guess but 50 parts/components?
13 January 2022 at 18:57 #580264
Former Member
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@formermember12892
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