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Lady Stephanie

starting project

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john carruthers23/09/2015 08:06:15
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As a winter project I'm starting a Lady Stephanie six column pumping engine from A.J.Reeves.
Anyone done one? anything to watch out for?
I haven't seen the drawings yet but what other materials will I require?
Is it worth making governor gears or using stock items? (I have used a pair from an old hand drill before).

David Clark 123/09/2015 10:25:44
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I think this has been published as a series. Not sure if it was Model Engineer. Popular science or popular mechanics rings a bell. This would have been the UK version published probably in the 1970s. I remember a beam engine in one of the last two mentioned.

Roderick Jenkins23/09/2015 18:15:39
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Serialised in Engineering in Miniature in 1981.

Rod

Neil Wyatt23/09/2015 21:12:15
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I've been half way through one since about 2004.

Some of the ones I've seen simplify the entablature, which is a shame.

My flywheel was badly dished, I've got one laser cut as a replacement.

Neil

john carruthers25/09/2015 13:13:17
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Sorry for the tardy reply, had a login problem.

Thanks for your comments. The castings arrived within 24 hours of order.
I've been giving the drawings 'a good coat of looking at' and started on the entablature.
I shall go through the drawings rationalising the mixture of dimensions, mm, inch fractions and decimal inch fractions :-/



TBC.....

Neil Wyatt25/09/2015 14:13:35
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Read Tubal Cain's book on engineering drawing and see how many of his own rules he broke with Lady Steph!

Bob Unitt 125/09/2015 18:50:14
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I started one of these in (I think) 1992. One of these days I'll get round to finishing it...

See http://www.bobunitt.me.uk/steph/steph.htm

 

Edited By JasonB on 25/09/2015 19:56:43

john carruthers27/09/2015 10:17:15
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cast draw.jpgent beam.jpg

Thanks Bob, I saw your video when I was researching the project.

Progress so far; filed up and drilled the entablature and beam. I would like to centre the beam bosses on the holes. I can't swing it so I'll make a little annular cutter.

The flywheel had some horrible hard chills, sparks flying off in places. Still got to clean up the spokes, might get a carbide burr as even my best files won't touch them.

flyw.jpg

Edited By john carruthers on 27/09/2015 10:18:29

Roderick Jenkins27/09/2015 13:38:47
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Posted by Neil Wyatt on 25/09/2015 14:13:35:

Read Tubal Cain's book on engineering drawing and see how many of his own rules he broke with Lady Steph!

or maybe the EIM illustrator converting them into the house style? Apparantly it can happen in even the best regulated magazines wink

Rod

Neil Wyatt27/09/2015 13:52:14
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The sheets are his own drawings, they match his style. I haven't found errors, just matters of style (and lack of projection symbols).

Neil

Bob Unitt 127/09/2015 16:49:22
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You may find this of use, john - it's an index I made to all the Lady Stephanie construction articles.

steph_index.jpg

john carruthers28/09/2015 07:36:13
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Thank you Bob, yes I will look them up. It seems as good an order of operations as any as well.
I'm still gathering materials. I'd like to do as much as I can in brass.

john carruthers01/10/2015 08:31:54
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I've acquired a diamond file and tidied up the flywheel, just needs reaming now and a keyway cut.

Has anyone ever worked out what one of these costs in materials, tooling and time? must run into thousands?




Neil Wyatt01/10/2015 10:34:57
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Materials aren't a huge cost, it's a pretty small engine really.

Time is the biggest investment, a lot of fiddly bits.

Neil

Ian S C02/10/2015 11:29:38
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Time and tooling are the big money, I don't know the charge out rates are in a UK engineering shop, but 50 pounds an hour might not be too much, no wonder every one (well a number) on here want things to go faster.

Ian S C

john carruthers03/10/2015 15:35:50
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Crank done (loctite and 1.5mm pins) and the flywheel.crank and flywheel

john carruthers10/10/2015 16:22:20
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crank bearingsbeam fittedGood progress today, made the beam pins and bearings, finished the crank bearings, machined the steam chest except the 4 flange holes - have to make a drill jig for them so all fit the same.

steam chest

john carruthers11/10/2015 14:35:22
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cyl st chest.jpgGetting there, one piece at a time; cylinder bored a thou under size to allow for honing, and the steam passages drilled.

cyl st chest (1).jpg

john carruthers26/10/2015 14:28:39
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Steady progress....


plates columns.jpg

Neil Wyatt26/10/2015 18:23:31
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Cripes, you're past me already... and I've only be going at it for about 10 or 12 years...

Neil

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