timo
E-xcellent poster
Completing 3 1/2 Rainhill .Building 5" Railmotor and waiting to start 3 1/2" King
Posts: 234
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Post by timo on Aug 4, 2019 17:30:59 GMT
More Good News!Boiler passed the shell test today. No stopping now! Congratulations!
Tim
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JonL
Elder Statesman
WWSME (Wiltshire)
Posts: 2,990
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Post by JonL on Aug 4, 2019 18:08:42 GMT
Superb! Soon be in steam...
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Post by simplyloco on Aug 4, 2019 22:24:14 GMT
Piston valve type regulator adopted. Just a little work today. This tube was supplied with the beast. Drilled 80 holes x 0.8mm in the regulator tube which gives me 50% extra cross section over the 0.25" outlet. Thanks to Chris (Coniston) for the very welcome advice regarding the regulator.  20190804_155923 by inkaboat, on Flickr It looks like I will have to shorten the tube by about 5mm and make the bronze valve sleeve lock the tube in place to stop it turning and keep every thing concentric. I hope... A PTFE ring will be held in a floating top hat arrangement.  20190804_165633 by inkaboat, on Flickr The business end where I will make the two handed lever before I work out where the piston valve goes.  20190804_170354 by inkaboat, on Flickr
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Post by simplyloco on Aug 5, 2019 16:50:58 GMT
Third time lucky on the regulator draw bar!Fiddly little b*gg*er this was, it's taken me most of the day! I was trying to avoid huge spigots and joints, and keep all things centred, so this last design just about does it for me. It looks like I will have to lengthen the top slot on the mid point to give more lateral movement though.  20190805_165413 by inkaboat, on Flickr Turning it up out of EN1A hex bar at 2500 rpm. The home made cup centre works a treat!  20190805_164653 by inkaboat, on Flickr
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Post by simplyloco on Aug 5, 2019 21:31:15 GMT
My attempt to make things a little smaller has failed: the shaft broke the first time I tried to use it! Back to the original flat bar with machined ends...  John  DSC00135 by inkaboat, on Flickr |
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Post by Cro on Aug 6, 2019 6:15:38 GMT
A great photo for the backhead layout to help and show how regulator handle should be. www.deviantart.com/2509-silverlink/art/GNR-Stirling-Single-no1-2-331376703Grandads Single is done like that and looks the part. If made to drawings which looks as though your regulator is (block in tube) leaks like a sieve under hydraulic but perfect on steam. I must get it back out for a play! Adam |
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Post by simplyloco on Aug 6, 2019 7:20:39 GMT
A great photo for the backhead layout to help and show how regulator handle should be. www.deviantart.com/2509-silverlink/art/GNR-Stirling-Single-no1-2-331376703Grandads Single is done like that and looks the part. If made to drawings which looks as though your regulator is (block in tube) leaks like a sieve under hydraulic but perfect on steam. I must get it back out for a play! Adam Thanks for your input Adam, I'll do it that way! John |
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Post by simplyloco on Aug 6, 2019 14:10:18 GMT
As drawn!The standoff looks huge, but it is exactly to the drawing, apart from my bronze handles that is...  I concur with Adam that it looks the part now. I read somewhere that an articulated joint between rod and arm is useful. Any views on this? Time for a spot of lunch! John  DSC00144 by inkaboat, on Flickr  DSC00145 by inkaboat, on Flickr
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mbrown
Elder Statesman
Posts: 1,794
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Post by mbrown on Aug 6, 2019 14:36:08 GMT
My similar pull-out regulator has the link between the end of the handle and the boiler pivoted at both ends to accommodate the arc of movement. But an alternative approach is to use a slot for the pin to the regulator rod for the same purpose. Not sure which approach Mr Stirling used....
Incidentally, for the pins I used 1/16" taper pins, taper reaming right through the hole and then taking out a tiny scrape more from the bit which needs to move against the pin. The pin is thus firm in the fork and free to move in the middle, but can be removed by a simple tap or squeeze with pliers at the narrow end. Much easier than press fits or tiny nuts and bolts.
Malcolm
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Post by ettingtonliam on Aug 6, 2019 18:50:31 GMT
On the photo of the full size engine, the regulator handle looks to be the same length on both sides, but on yours the left hand is shorter than the right hand? Maybe a slotted hole is needed in the handle either where it pivots on the support, or at the regulator rod?
Richard
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Post by simplyloco on Aug 6, 2019 20:01:41 GMT
Completed. Thanks for all the help. I'll replace the brass rivets with something more permanent. Richard, I've made the LH side shorter to give me more leverage, and to avoid hitting the gauge glass, but on working it is as smooth as silk: no slots are needed. I must have got the arcs just right  . Anyway, there isn't a fireman available to push on his side... EDIT. I hope I haven't overcooked the RHS and land up hitting the cab wall!  DSC00146 by inkaboat, on Flickr  DSC00147 by inkaboat, on Flickr
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twombo
Seasoned Member
Posts: 120 
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Post by twombo on Aug 6, 2019 20:02:23 GMT
Very attractive, with that fine double taper! I am curious about the dual handles! In full size, might this be to control the movement for smooth and accurate adjustment? A big. Handle for a job requiring strength. Working that pair of arms and shoulders !! In miniature, keeping to the classic lines?
I am seeing myself in miniature, on the footplate!
Super Job!
Mick
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Post by simplyloco on Aug 6, 2019 21:16:17 GMT
Just to be sure, I attached the turret and blower connection. More by luck than judgement, when closed, the handle stops just short of the blower pipe! I also have plenty of side clearance...phew! We'll have a go at the other end tomorrow. John  DSC00150 by inkaboat, on Flickr  DSC00149 by inkaboat, on Flickr |
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Post by simplyloco on Aug 6, 2019 21:55:57 GMT
SNIP I am curious about the dual handles! In full size, might this be to control the movement for smooth and accurate adjustment? SNIP Mick Hi Mick Apparently the dual handles were there for the fireman to lend a hand when deemed necessary... John |
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twombo
Seasoned Member
Posts: 120
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Post by twombo on Aug 7, 2019 0:16:55 GMT
Yes, John, that makes perfect sense! Driving and firing was a team sport in those days!
The “Business end” of this Locomotive is shaping into a nice place to work! Those handles look like a tricky bit of work-holding!
Mick
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twombo
Seasoned Member
Posts: 120
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Post by twombo on Aug 7, 2019 0:34:50 GMT
A quick question, please? Is the turret referred to, in some Regions, As a “ Fountain? Might this be A term I could have read in some of LBSC’s. Writings? i am starting to find some of hisWords and music in various places on the net.
So far, I have found Doris, Tich, and that “ American”. Styled. Creation of his! oh, The evans 9f book too! I love to read his Work! Leads on others are appreciated!
Best to all
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stevep
Elder Statesman
Posts: 1,073
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Post by stevep on Aug 7, 2019 7:37:57 GMT
I'm glad to see you have used a banjo connection on to the blower tube. I cannot understand why so many designs have the valve screwed on to the blower stay, with live steam then fed to the wrong side of the valve - i.e. on the gland side.
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Post by simplyloco on Aug 7, 2019 8:00:28 GMT
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Post by warspoils on Aug 7, 2019 8:51:15 GMT
Hi John thats looking good, here are a couple of pictures taken of my ancient Stirling found on a scrap yard   regards Jeff |
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Post by simplyloco on Aug 7, 2019 9:01:54 GMT
Hi John thats looking good, here are a couple of pictures taken of my ancient Stirling found on a scrap yard SNIP regards Jeff The 'Spoils of War' eh? A good find indeed. John |
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. Anyway, there isn't a fireman available to push on his side... 
