smallbrother
Elder Statesman
Errors aplenty, progress slow, but progress nonetheless!
Posts: 2,269
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Post by smallbrother on May 4, 2021 20:39:15 GMT
Well the same idiot fixed it so that's a win for you in my books.
Pete.
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Post by delaplume on May 4, 2021 21:25:11 GMT
Hi Paul,
Yes, Martin Evans gives a B-2-B in 3.5" gauge as}----- 3 + 9/32" = 3.2813" ( 3.282" corrected )......Bearing in mind that 0.050" is just short of 1/16" ( 0.0625" ) I would have thought that was a wee bit too much float.....I don't know what the 3 and a half boys use in general but my gut feeling would be more towards the 0.015" to 0.020" area, given that 0.0156" is 1/64".....
Your pony truck is looking very professional......... Did you not fancy changing the design to incorporate an axlebox keep plate then ??.....as per the recent Hall thread.... now would be the time to do it and it will save someone ( maybe you or a later owner ) a lot of bother....
Keep it going !!
Alan
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Post by delaplume on May 4, 2021 21:33:41 GMT
I worked out why my hand pump has always been such hard work.... after I swapped my clacks left to right suddenly it became easier, and the axle pump blew out its glands.... turns out I'd for some reason incorporated a copper washer into the top of the clack, allowing enough clearance for the ball to semi seal itself on the opposite seat... I'm such an idiot... OOpppssssssss............no you're not !!...............Made a mistake, .........rectified it.......... learnt a lesson..........passed-on the info.........just like the rest of us !! Don't get overheated about this.......... you might end up developing the "China Syndrome"......ahem !! ( RSVP by PM is best )...
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Post by GWR 101 on May 4, 2021 22:54:18 GMT
Alan, many thanks. Yes I did consider making the axles detachable and even discussed it with one of my clubs engine makers. We agreed that the amount of metal below the slot was possibly border line for making that modification. Possibly at some future date I will make some redesigned frames and then I can make the axle assembly removable. In the mean time as I always machine my axles between centres I always incorporate centre holes so although I can't change the bearings I will be able to re machine the wheels without removing them from the trucks. Many thanks for your interest. Regards Paul
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dscott
Elder Statesman
Posts: 2,438
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Post by dscott on May 5, 2021 0:10:06 GMT
Did a big sort out between trimming and sanding the outsides of more heavy duty shelves. Then as they are MDF give them a paint of PVA all over. Stops the dust!! Then began to clear behind the Emco for the second set. MESSY. I did not realize just how much I had used it. And found this!!! Yes a direct copy from the Myford dividing head done early Summer 1982. Back when us students had some time to kill during our end of course show. With the march of technology it may make a very nice Rosebud Grate. Our latest gluing's are setting overnight. David and Lily.
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Post by GWR 101 on May 5, 2021 6:47:16 GMT
Alan, further to previous post, I have been giving this some more thought. The wheels and axles are next on the list and if I instead of making the inside face flat leave the centre boss about 0.010" proud and reduce the axle shoulder dimension by the same combined amount then I maintain the same back to back and reduce the end float by .020". Regarding the modification to the frames to enable the units to be removed. This does still not give me a means to replace the bearings, the solution here would be to make the bearings in two halves split on the horizontal centre line. Of course another solution (which I quickly dispelled) is to make the axles in two halves, as these are not part of the traction unit it is a possibility. Once again many thanks for your experienced and much appreciated input. Regards Paul
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Post by GWR 101 on May 5, 2021 11:32:57 GMT
Hmmmmm now that could be a bit of a problem, as there is not much surplus material and that is where the 1/16 edge is ? Regards Paul
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johnd
Part of the e-furniture
Posts: 282
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Post by johnd on May 5, 2021 11:34:27 GMT
Inspired by the model movement post I raided the storage shed, ordered some cheap wheels from our favourite auction site and spent a couple of hours in the workshop cutting and drilling. Tomorrow out with the mig. Then stage 2, a couple of rails for the loco elevated about 6” above chassis. Big wheels needed to go over grass.
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don9f
Statesman
Les Warnett 9F, Martin Evans “Jinty”, a part built “Austin 7” and now a part built Springbok B1.
Posts: 960
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Post by don9f on May 5, 2021 18:56:48 GMT
Hmmmmm now that could be a bit of a problem, as there is not much surplus material and that is where the 1/16 edge is ? Regards Paul Hi Paul, could you fill those blowholes with silver solder? Cheers Don
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JonL
Elder Statesman
WWSME (Wiltshire)
Posts: 2,909
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Post by JonL on May 5, 2021 21:14:27 GMT
Chemical metal?
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Post by GWR 101 on May 5, 2021 22:27:23 GMT
Thanks both, I need to get it back in the workshop and take some more precise measurements. There might be a chance I can alter the original cutting orientation that I had planned and locate them at the bottom rear of the bearing. Failing that I will probably resort to silver solder. Regards Paul
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Post by ettingtonliam on May 5, 2021 22:37:15 GMT
Soft solder would be fine for that.
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dscott
Elder Statesman
Posts: 2,438
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Post by dscott on May 5, 2021 22:54:22 GMT
Well today between showers and heavy wind sanded the last 2 shelves and painted our way out of the works. PVA is superb for MDF and can be watered down in small quantities. Some time ago I posted a set of wheels I made for someone in our Club. Well this is what they were going on. At the moment just fitted and rolling round to test. I left them quite wide and so far has not come off the track. Here with one he built earlier. And something we cobbled together. China Rail meets Cross Country with function over form and ideas lost in translation. The Loco to the right is German. David and Lily.
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mbrown
Elder Statesman
Posts: 1,719
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Post by mbrown on May 6, 2021 7:43:04 GMT
I thought I recognised the little brown diesel. The Waldeisenbahn Muskau have several like it on 600 mm gauge. I think they were an East(?) German standard design produced in large numbers.
Malcolm
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Post by GWR 101 on May 6, 2021 15:10:33 GMT
Some may remember this from yesterday :- Well I decided to machine it down to the correct thickness to see how bad it was, and found this :- So it appears I can still get two out of it. Fortunately I had a surplus piece of PB so I machined that down to get a replacement piece. Phew, all good stuff, so onward I just need to cut them up and machine the slots. Hopefully no more unpleasant surprises I never was a great fan of Swiss cheese ! Regards Paul.
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dscott
Elder Statesman
Posts: 2,438
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Post by dscott on May 6, 2021 22:50:40 GMT
4 hours away from the Workshop? Yes the first stop was Berkshire Metals of course. £100 out of the cash machine and some petrol.
Next a new mobile but was not so happy with the salesman when Lily found one for £75 outright. (He in search of contracts etc) Asked me about collecting antiques and that SIM Cards had got even smaller when the HTC came out of pocket. Card out and back in and we left. Honestly you could only visit one department at a time and you had to return to the front door and wait for another department to become free. Thoughts of a ZOOM camera and a newer computer with internal Biscuits... So sorry COOKIES. Abandoned.
Drove back past our Reading Club with 3 cars working in a bubble or huddle. Wednesdays were our workdays. Lidl and some more NIBBLES for half time rest between workshop sessions. Lily got some VERY BRIGHT PANTS!!
David and Lily.
More long nosed pliers at £1.50 couldn't resist.
AND THE MOBILE WAS SHOCKED INTO WORKING AGAIN!!!
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Post by delaplume on May 6, 2021 23:24:34 GMT
Some may remember this from yesterday :- Well I decided to machine it down to the correct thickness to see how bad it was, and found this :- So it appears I can still get two out of it. Fortunately I had a surplus piece of PB so I machined that down to get a replacement piece. Phew, all good stuff, so onward I just need to cut them up and machine the slots. Hopefully no more unpleasant surprises I never was a great fan of Swiss cheese ! Regards Paul. Hi Paul.....You could leave the back flanges off.........they don't do anything apart from maybe jam the box if too close........ Which ever version you choose to make don't forget to put some curvature on all the flange faces......This will help the boxes to tilt if needed..... Also, don't be tempted to drill the oil hole all the way through------that No.65 hole is there to regulate the flow of oil to a bare minimum....
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Post by delaplume on May 6, 2021 23:30:27 GMT
A bit of a mixed bag these last few days--------- Brasing, turning, painting, re-upholstering, applying transfers, .... the photos speak for themselves....
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Post by GWR 101 on May 7, 2021 8:55:42 GMT
Alan many thanks for your guidance always happy for a sanity check. Fortunately when I made my 3 1/2" Juliet it has a very similar configuration and bearing design except of course no pony or bogie trucks. Sadly this is probably the last steamer I will build as I explained it was started by my late father and so I feel morally obliged to get it finished and running in his memory. Progress is a lot more rapid as I now have more modern turning capacity and an excellent miller, on Juliet I was forced to use "night school" facilities once a week. I always read your posts on the Bear and look forward to seeing it at Little Hay. Regards Paul
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Post by delaplume on May 7, 2021 19:20:28 GMT
Hello everyone, The comsol flux arrived to-day so I've made a start on plugging the holes in the 57xx boiler where the top feed used to be......... Because I want our club Boiler Inspectors to be "up to speed" with what I'm doing I've broken it down into three parts.......ps, "plug" means drill and tap a thread.. 1) Prep the boiler and discuss intended repairs.......... 2) Plug the 2 smaller holes first at 2BA and comsol......... 3) Plug the 2 larger holes and comsol When they are happy with stage 3 then I'll do an initial staged pressurising up to the stated WP of 90 psi.......with the usual visual checks for leaks, bulges, deformity etc......Then it's up to 2 x WP = 180 psi .........When that's ok I'll book the official test leaving all the various plugs in place... As I wasn't available at the club last week I made a start on stage 2.....
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