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Post by flyingfox on Jan 11, 2017 17:00:53 GMT
Greetings, out of interest, what is the diameter of modern electric & diesel locomotive wheels?
they seem to do plenty of revs?
regards Brian
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Post by flyingfox on Jan 11, 2017 16:58:04 GMT
Greetings, they also make a 500 Kg version of this lifting table, and I know they are widely used by model engineers. A long time ago, I wrote an article in Model Engineer showing how to extend the length of the table, and I use the 500Kg version for my A3, 7 1/4 gauge.
Regards Brian
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Post by flyingfox on Dec 12, 2016 7:31:48 GMT
Greetings Tony, its always interesting to see development work like this going on. any ideas to reduce the load on slide vales is well worth following.
I am also interested in the driving method for the valve, and am concerned that an offset drive as you have shown, might allow the valve to twist under load. I wondered if a "buckle" type drive would stop this, and allow you more room for the balancing arrangement?
I have always found the simplex valve events to be good in actual use.
regards Brian
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Post by flyingfox on Dec 1, 2016 16:57:08 GMT
Hi John, I have found that the most successful brake shoes to use was a set of bicycle brake blocks. they are cheap, easy to fit, and work well. regards Brian
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Post by flyingfox on Nov 1, 2016 17:34:15 GMT
Hi Greg, screwdown regulator every time.
regards Brian B
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Post by flyingfox on Oct 30, 2016 17:47:41 GMT
Hi Greg, good to hear from you. I think that if the curves in the wet header feed pipe were a gentle radius you would be able to wriggle them in. I went for the single superheater flue to make it simpler in the smokebox, there is not much room inside it, even with a split smokebox. The loco was built starting in Aug 1980, and finished in 53 weeks, including the boiler, wish I could build them that quick now. It steams well, and ran faultlessly, until the second IMLEC I entered in when a superheater blew. It has run many miles in various countries, and i found that its 77lb weight manageable, as well as giving a good ride. I am just starting a doubled up version for 71/4 gauge. used 3/32 for the inner firebox wrapper, but made the stay pitch as shown.
regards Brian B
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Post by flyingfox on Oct 29, 2016 16:38:58 GMT
Hi Greg, hope you will be as satisfied with your Jubliee, as I was with mine.
How about making the regulator body as you suggest, 5/8 dia, then silver soldering the exit pipe into it, with its kink, arranged so that it fits directly into the bush, lining up square to the bush, which could be screwed on, but I know the O ring seal is easier, and i would recommended this method. If the pipe were soffened, then it could be slightly bent to get the correct alignment
Also, I would suggest that the single superheater flue, used with a radiant stainless steel superheater is the way to go.
regards Brian Baker
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Post by flyingfox on Aug 11, 2016 17:11:38 GMT
greetings, I have used loctite 572, best described as liquid PTFE.
it seals well, and can be unscrewed easily. I think it was designed for screw pipe sealing.
regards
Brian
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Post by flyingfox on Jul 15, 2016 16:35:59 GMT
Greetings, I looked at your video, and my first thought was that the left hand side did not seem to be pumping very much. Although i liked your test setup, you had no means of testing the pressure of the output. i suggest that first off, you apply a finger to each outlet in turn, when the discharge pressure should push the oil past you finger, however hard you try to stop it. You could also connect a pressure gauge to the outlet, when one or two turns of the pump should generate enough pressure to wreck the gauge, so be very careful doing this test. Use an old pressure gauge, i keep one for this job. If the pump cannot deliver at a high enough pressure, then it will not overcome the steam pressure in your locomotive's system. regards BB
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Post by flyingfox on Jun 19, 2016 7:16:55 GMT
Greetings, you could try putting your thumb over the outlet pipe and operated the pump, which should push oil past, however tightly you push it. I have used this type of lubricator, with out problems, but I used a check valve in line as well. Regards Brian
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Post by flyingfox on May 21, 2016 19:14:18 GMT
Just back from this splendid show, plenty to see, and with a few minor tweaks to signage, will be come a great event. Much easier to access from Norfolk, and driving through Doncaster straight forward. show was well attended, with one or two new traders as well as the old favorites.
John S was too busy sharpening end mills to say hello, hope his collection tin was full.
well worth a visit.
Brian
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Post by flyingfox on Apr 16, 2016 16:29:43 GMT
Greetings, I have seen used the fine sand that is prepared to go into budgie & other small bird cages. regards Brian
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Post by flyingfox on Mar 8, 2016 7:33:49 GMT
Many thanks to you all, found what I wanted thanks to the help given. I had looked in LLAS, but obviously in the wrong place. Thank you Brian Flying Fox
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Post by flyingfox on Mar 7, 2016 17:23:16 GMT
Greetings to you all, Can anyone please advise me where this locomotive was described by Don, was it in LLAS, or ME? A volume/ page reference would help. Thank you Regards Flying Fox
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Post by flyingfox on Jan 24, 2016 17:33:28 GMT
Greetings Greg, and I have to tell you that more years ago than I care to remember, I built the same loco & it ran sweet as a nut, and still does. At one IMLEC, I ran further than any 5 in gauge loco.
Re your problem, at the risk of being very basic, but have you set the driving axle in its running position, and when you set the eccentric rod length and the return crank setting, was the axle in the same running position?
regards Brian Flying Fox
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Post by flyingfox on Jan 4, 2016 17:04:45 GMT
Greetings, I make the capacity of the tanks 2.33 pints, which means that at 3/5 ths of a pint per minute, the tanks will last about 3 mins 50 seconds.
regards Brian Flying Fox
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Post by flyingfox on Nov 17, 2015 8:19:37 GMT
Thanks for that Rob, somewhere I have a photo of it taken when the "Pontins" lot visited it as a stop gap whilst the Whitchurch track was moved & rebuilt. The main thing I remember about it was its length, and that it ran along side the river Usk regards Brian
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Post by flyingfox on Nov 16, 2015 17:09:50 GMT
Greetings to you all, One point not yet made, is that the detail of locomotive models is improving, and as we all know that means that they take longer to build, it takes longer to place 2000 odd rivets in place than to ignore them. Just compare "Highland Lassie", with "Doncaster", and you will see how much closer to scale it is, and thus they take longer to build, at a time when we all seem to have less time. I fail to see however, why all boilers have to be purchased. A boiler like Rob Roy can be built easily by a beginner, and flanged plates are not necessary either. I admit to buying a 71/4 Britannia boiler (From that nice man at southern boilers, and mighty fine it is too), but I have built, or helped to build some 30 odd boilers over the years. All hobbies are subject to change, and ours is, I think, moving to improved quality. The ME press has to remember that newbies are not experienced machinists and produce articles & designs that refect that, as well as encouraging the use of laser cut parts etc. No this not a "past it" hobby, but changing one. regards Brian Baker
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Post by flyingfox on Nov 3, 2015 17:41:15 GMT
Greetings, you need water with low Total dissolved solids (TDS). Softening the water will make little or no difference, since anything dissolved in the feedwater finishes up in your boiler, only the water is evaporated, as steam, all the rest remains behind, as you appear to have found. Collected, filtered rainwater is your best option, free, easy to collect and store, and very low TDS Regards Brian
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Post by flyingfox on Oct 30, 2015 7:58:01 GMT
Greetings,
The longest elevated track that I have ever driven on is Newport, S Wales club, which was just over 5000 feet long, but I believe that it has now been shortened a little.
Echills Wood Railway, at Kingsbury, Warwickshire is over 2 Km of 7 1/4 ground level main line, plus lots of sidings, and I have seen some where that the Derby club's track will be about the same length when their extension is finished.
Daddy of them all of course, is Train mountain, 28 miles of 7 1/2 ground level & growing longer almost by the minute.
regards
Brian
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