Giles Posted June 5, 2017 Author Share Posted June 5, 2017 (edited) I had one failure at RAILEX , and that was the Bagnall, whose pickups were unreliable, and now isn't running well at all...... I'm making a new chassis, by laser cutting templates in MDF, and then pantograph milling them out will my little modified Proxxon pantograph engraver, but actually, I've decided to make a complete new loco, and I'll make new coupling rods for the original Bagnall I've started building one of my Wrightlines Bagnalls to sit on this chassis. It means that the only part of the kit for the chassis I get to use will be the cylinder castings, as I can't bring myself use the solid pretend expansion link/motion bracket supplied for use with the Dapol chassis. I'm also going to try to make this integration controlled, but this rather depends on whether the motor gearbox and other bits I've ordered prove suitable. I've ordered a 6v 5:1 Polulu, which i hope to then drive a 20:1 worm and gear. These are very economical power wise, and the combination should give me a maximum of about 150rpm at the wheels. Because it's intended for hard exhibition use, long battery life is a must, and i can just get a 650mAh battery into the boiler, which I'm hoping will last a full exhibition day (The mobile crane did 6 1/2 hours with an identical battery, with motors running constantly, whereas this will run more intermittantly. I don't know the history of the Wrightlines Bagnall, but to me, it looks like it might be Roy Link's workmanship- not wishing to cause anyone any offence - certainly the quality is very good.... Edited June 5, 2017 by Giles 10 Link to post Share on other sites More sharing options...
Giles Posted June 10, 2017 Author Share Posted June 10, 2017 I bought set of Romford 20:1 gear and worm, shortened the worm, and bored it out to 3mm, giving this is the result. The (5:1) motor gearbox plus worm is 36mm long, 10 x 12mm, and gives 100:1 total reduction. 7 Link to post Share on other sites More sharing options...
thrustanparry Posted June 12, 2017 Share Posted June 12, 2017 (edited) Hi Giles, This is very timely - I have a couple of Roy's original Bagnalls I would like to try this on - I hope you don't mind me tagging along and letting you do the heavy lifting! IMG_0216 by Craig Parry, on Flickr Cheers, Craig (from Canada) Edited June 12, 2017 by thrustanparry 1 Link to post Share on other sites More sharing options...
Giles Posted June 13, 2017 Author Share Posted June 13, 2017 .....you lucky, lucky man...... no not at all! Link to post Share on other sites More sharing options...
Giles Posted June 13, 2017 Author Share Posted June 13, 2017 (edited) I should have said that I've made a new chassis by laser cutting templates in MDF, twice the size, and cutting them out using my little Proxxon pantograph engraver (adapted to light milling) Edited June 13, 2017 by Giles 2 Link to post Share on other sites More sharing options...
Giles Posted June 13, 2017 Author Share Posted June 13, 2017 With the motor held in with blutack, you can see the very simple compensation bar at the front, and also the tabs silver soldered into the front bearings, which stop them rotating. 6 Link to post Share on other sites More sharing options...
otherplanet Posted June 14, 2017 Share Posted June 14, 2017 We are doing the Farnham and District show at Aldershot, 14 and 15th Oct, and the Uckfield show in West Sussex. Do make yourself known and come and have a play! Look forward to seeing you thank you very much, I shall put them in the diary and try to get along to one. I think the last time I went to Uckfield it was on a Thumper. Link to post Share on other sites More sharing options...
Giles Posted June 15, 2017 Author Share Posted June 15, 2017 I look forward to it! Regarding the Bagnall, i may have mentioned my reluctance to use the solid cast representation of the Bagnall-Price valve gear, although that always remains an option.... I should prefer to fit Walschearts, which will have to be scratchbuilt, along with motion brackets etc.... Now I come to look at it, the cylinders on a Walschearts fitted loco are different to those fitted to a Bagnall-Price fitted loco. The main difference being the position of the valve chest. This means new cylinders as well! Will it never end...? Here's my latest lasering with the Emblazer - an expansion link in .028" nickel-silver. Well, almost..... a slight cheat.... I laser the expansion link in 2mm MDF twice full size as a template And then mill it out with my little Proxxon pantograph engraver, modified to light milling. Link to post Share on other sites More sharing options...
Giles Posted June 16, 2017 Author Share Posted June 16, 2017 (edited) I've done the new cylinders - they'll use the original castings for cylinder end covers and valve chest cover, and i need to drill them to take the valve spindle, once I've worked the position out. It was a bit of a faff bending the wrappers to the correct shape, but that was the only fiddle. The two end plates were held in the correct position for silver soldering to the back plate by using a frame spacer, shortened down to give the correct length. The wrapper was also silver soldered, and this has given a really strong unit to which I will solder the other bits. The wrapper was fitted slightly over size, and then trimmed down afterwards. Also shown are the milled Conn rods. Edited June 16, 2017 by Giles 1 Link to post Share on other sites More sharing options...
Giles Posted June 30, 2017 Author Share Posted June 30, 2017 Just to say that all these photos will disappear in the next few hours thanks to Photobucket - so copy them whilst you can. Link to post Share on other sites More sharing options...
Giles Posted June 30, 2017 Author Share Posted June 30, 2017 A test of Flickr IMG_1815 by giles favell, on Flickr 8 Link to post Share on other sites More sharing options...
Giles Posted July 1, 2017 Author Share Posted July 1, 2017 Just in case photos disappear https://www.flickr.com/photos/154226058@N08/albums/72157682885529103 And other albums such as the Garrett and RC vehicles are there as well. Link to post Share on other sites More sharing options...
RMweb Gold PaulRhB Posted July 4, 2017 RMweb Gold Share Posted July 4, 2017 Not that I'm trying to corrupt you further but I found this site and thought, now Giles likes a challenge Scroll down to the Sentinel conversions with fine chain drives! http://dave-mills.yolasite.com/models-in-progress.php 1 Link to post Share on other sites More sharing options...
Giles Posted July 5, 2017 Author Share Posted July 5, 2017 Not that I'm trying to corrupt you further but I found this site and thought, now Giles likes a challenge Scroll down to the Sentinel conversions with fine chain drives! http://dave-mills.yolasite.com/models-in-progress.php You bad man. I've been restraining myself against those for many years. I first saw an original Foden conversion in a 1950's Model Engineer (the prototype, not a model - and I saw it in the '70's!) And it had a load of sand on the flatbed to give it adhesion. The Sentinel also has a real charm though. Neither would work on Denton Brook, given the extreme gradient,, but maybe another layout? Link to post Share on other sites More sharing options...
Giles Posted July 8, 2017 Author Share Posted July 8, 2017 (edited) Test from my website.... Edit. Good Heavens .... that worked.... It doesn't even work on mine now....! Edited July 8, 2017 by Giles Link to post Share on other sites More sharing options...
peter220950 Posted July 8, 2017 Share Posted July 8, 2017 (edited) Giles, It doesn't on my tablet just times out. The page itself looks like this. Not sure what's going on. Peter Edited July 8, 2017 by peter220950 Link to post Share on other sites More sharing options...
BG John Posted July 8, 2017 Share Posted July 8, 2017 Same for me on my Linux laptop with a big screen, although I'm only informing you once, unlike Peter, who seems so annoyed that he had to say it twice . Link to post Share on other sites More sharing options...
peter220950 Posted July 8, 2017 Share Posted July 8, 2017 Same for me on my Linux laptop with a big screen, although I'm only informing you once, unlike Peter, who seems so annoyed that he had to say it twice . No I'm not annoyed I'm just incompetent, but I did manage to edit the duplication out, who could ever be annoyed at one of Giles's posts? Peter 2 Link to post Share on other sites More sharing options...
Giles Posted July 8, 2017 Author Share Posted July 8, 2017 Ah well - sorry Gentlemen! Back to the drawing board!!!!!! much apologies....... it must have been my computer being downright clever and remembering things.... Back to Flickr. Link to post Share on other sites More sharing options...
Giles Posted July 8, 2017 Author Share Posted July 8, 2017 (edited) Pantograph Milling by giles favell, on Flickr Milling the valve gear for the Bagnall with Proxxon Pantograph. it gets very small indeed... The anchor link is only 1.0mm wide, and I had to be careful to mill it leaving one side attached so as to get clean ends, before milling the final side. Milled Link by giles favell, on Flickr One side of gear fully assembled. The pins are the small type of dress making pins (steel) that you get with new shirts (0.6mm dia) with their ends spun down in my drill with a needle file. All joints are silver soldered, which, once you get into the swing of it is easier and more reliable than soft solder, with no cleaning up. Valve Gear Bagnall by giles favell, on Flickr Edited July 8, 2017 by Giles 2 Link to post Share on other sites More sharing options...
Giles Posted July 8, 2017 Author Share Posted July 8, 2017 I also sorted the Motion Brackets, even remembering to make one right handed and one left handed. These support the expansion link, and will have to be fitted with bearing blocks for the reverser cross-shaft later. 2017-07-08_07-22-17 by giles favell, on Flickr 2 Link to post Share on other sites More sharing options...
Giles Posted July 10, 2017 Author Share Posted July 10, 2017 (edited) The motion brackets are fitted, together with bearing blocks for the reverses cross shaft. It's turned into quite a long job.... Bagnall motion brackets silver soldered on by giles favell, on Flickr I've also fitted sleeves for the valve spindles to the cylinders, together with guides. Cylinder with valve guide and sleeve by giles favell, on Flickr Only a few more bits to make for the chassus6, then paint and assemble 0-14 Bagnall chassis, cylinders and valve gear by giles favell, on Flickr Edited July 10, 2017 by Giles 7 Link to post Share on other sites More sharing options...
F-UnitMad Posted July 11, 2017 Share Posted July 11, 2017 It may be camera distortion (I hope); but the cylinder on the right in that photo looks like I made it..??!! Link to post Share on other sites More sharing options...
CME and Bottlewasher Posted July 19, 2017 Share Posted July 19, 2017 Hi Giles, Congrats on the MRJ article, it looks superb. Kindest regards, CME Link to post Share on other sites More sharing options...
Giles Posted July 20, 2017 Author Share Posted July 20, 2017 Thank you - very kind! I'm looking forward to seeing it. Sadly our local WHS has downsized and stopped selling anything remotely interesting, so it will be a while! Link to post Share on other sites More sharing options...
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