RMweb Gold 46444 Posted March 25, 2020 RMweb Gold Share Posted March 25, 2020 Lovely snaps CK and glad work progressing on the the 74xx. Talking of which my copy of Railway Bylines dropped through the letter box this morning. There's a lovely article on Dolyhir Station on the Kington-New Radnor line with some nice snaps of 7420 toying with a wagon and brake van. The atmosphere in the photographs reminded me of what you have portrayed in Bethesda Sidings. Thanks, Mark 1 Link to post Share on other sites More sharing options...
Calidore Posted March 25, 2020 Share Posted March 25, 2020 3 hours ago, Captain Kernow said: The hills behind Plantagenet give some idea of the gradients all locos working back up the light railway face, when they leave Bethesda yard: This is one of the most convincing scene-to-backscene transitions I've seen, CK, lovely stuff. Thanks for sharing. Adam 2 1 Link to post Share on other sites More sharing options...
RMweb Gold Popular Post Captain Kernow Posted March 28, 2020 Author RMweb Gold Popular Post Share Posted March 28, 2020 Further progress on the 74XX chassis as of yesterday: Today I fitted the twin-beam compensation and finally had the wheels and axles sitting on the compensation system, as they are designed to do: 19 12 Link to post Share on other sites More sharing options...
RMweb Gold Brinkly Posted March 28, 2020 RMweb Gold Share Posted March 28, 2020 Very nice Tim. Certainly an improvement on the Bachmann chassis. Best wishes, Nick. 1 1 Link to post Share on other sites More sharing options...
bgman Posted March 28, 2020 Share Posted March 28, 2020 3 hours ago, Brinkly said: Very nice Tim. Certainly an improvement on the Bachmann chassis. Best wishes, Nick. Agreed, strangely enough I made a similar comment earlier which seems to have disappeared ? Anyone having similar problems ? Either way looking very good matey. 1 1 Link to post Share on other sites More sharing options...
RMweb Gold Brinkly Posted March 28, 2020 RMweb Gold Share Posted March 28, 2020 6 minutes ago, bgman said: Agreed, strangely enough I made a similar comment earlier which seems to have disappeared ? Anyone having similar problems ? Either way looking very good matey. Posting is taking a little longer to show up than normal; I've hit 'submit reply' and its taken a good minute for the comment to appear and the 'saving' button to disappear - I just put it down to the internet at my end! 1 Link to post Share on other sites More sharing options...
RMweb Gold Brinkly Posted March 28, 2020 RMweb Gold Share Posted March 28, 2020 9 minutes ago, bgman said: Agreed, strangely enough I made a similar comment earlier which seems to have disappeared ? Anyone having similar problems ? Either way looking very good matey. You posted on Tim's other thread. Mystery solved, my dear Hastings! 1 2 Link to post Share on other sites More sharing options...
bgman Posted March 29, 2020 Share Posted March 29, 2020 9 hours ago, Brinkly said: You posted on Tim's other thread. Mystery solved, my dear Hastings! But I didn't post it in Hastings and I've never been there. W.I.Showerehere 2 1 1 Link to post Share on other sites More sharing options...
RMweb Gold Popular Post Captain Kernow Posted March 31, 2020 Author RMweb Gold Popular Post Share Posted March 31, 2020 Waiting for a transfer goods off the light railway: 26 1 Link to post Share on other sites More sharing options...
RMweb Gold Captain Kernow Posted April 1, 2020 Author RMweb Gold Share Posted April 1, 2020 This afternoon I had one of my other panniers carefully shunting the 74XX around the yard, to ensure that I had set the correct number of spacer washers on the chassis, prior to installing the brake gear. 4 1 2 1 Link to post Share on other sites More sharing options...
bgman Posted April 1, 2020 Share Posted April 1, 2020 45 minutes ago, Captain Kernow said: This afternoon I had one of my other panniers carefully shunting the 74XX around the yard, to ensure that I had set the correct number of spacer washers on the chassis, prior to installing the brake gear. It's a method I tend to use too, hope it behaves itself and you have a perfect running chassis. 1 Link to post Share on other sites More sharing options...
RMweb Gold Captain Kernow Posted April 1, 2020 Author RMweb Gold Share Posted April 1, 2020 1 minute ago, bgman said: It's a method I tend to use too, hope it behaves itself and you have a perfect running chassis. Thanks, all seems well at the moment, but unfortunately Ben Ashforth wasn't around this afternoon, so there are no photos. 1 Link to post Share on other sites More sharing options...
RMweb Gold Popular Post Captain Kernow Posted April 4, 2020 Author RMweb Gold Popular Post Share Posted April 4, 2020 Further work on the 74XX chassis involves putting the brake gear together: Thanks to very clever design by High Level, the brake gear is designed to be removable for painting, maintenance etc.: 18 5 Link to post Share on other sites More sharing options...
RMweb Gold Captain Kernow Posted April 11, 2020 Author RMweb Gold Share Posted April 11, 2020 At the moment, the motor and gearbox are running in on their own, now that I've fitted the flywheel to the motor. 1 Link to post Share on other sites More sharing options...
bgman Posted April 11, 2020 Share Posted April 11, 2020 Does that mean you're happy with the chassis / rods etc running freely ? Hoping the answer is a positive one ! G Link to post Share on other sites More sharing options...
RMweb Gold Captain Kernow Posted April 11, 2020 Author RMweb Gold Share Posted April 11, 2020 1 minute ago, bgman said: Does that mean you're happy with the chassis / rods etc running freely ? Hoping the answer is a positive one ! Yes, the rods were always pretty free running, but the running in has improved matters to the extent that the new 'Captain's Slow Running Test' criteria were passed, albeit on the rolling road. I have a feeling that the problem might have been the main motor worm not quite meshing sufficiently well with the first idler gear in the gearbox. This has now been rectified. I also attached the flywheel earlier. There's a lesson to be learned here, when fitting flywheels. It's a 2mm motor shaft (a Mashima 1424) and the brass flywheel didn't initially want to go on it. I then reamed the bore on the flywheel out, but only slightly. Even that was too much and the flywheel then wobbled irreconcilably on the shaft when power was applied. I had another flywheel and practiced reaming that out even more carefully on a spare motor and that was fortunately able to be a snug force fit on the 74XX motor. 1 1 Link to post Share on other sites More sharing options...
RMweb Gold Popular Post Captain Kernow Posted April 11, 2020 Author RMweb Gold Popular Post Share Posted April 11, 2020 Did a bit of test running with the 74XX on Bethesda Sidings this afternoon. The motor is wired directly to the controller, hence the 'wander lead', as I haven't fitted the pick ups yet. I've also removed the brake gear to facilitate the test running: 13 7 Link to post Share on other sites More sharing options...
bgman Posted April 11, 2020 Share Posted April 11, 2020 Super, super, super ! Nicely done matey, once again time well spent and well worth it. I'm certain it can only get better with use. Thanks for the full explanation on how you achieved this, well worth knowing. G 1 1 Link to post Share on other sites More sharing options...
RMweb Premium St Enodoc Posted April 11, 2020 RMweb Premium Share Posted April 11, 2020 9 hours ago, Captain Kernow said: Yes, the rods were always pretty free running, but the running in has improved matters to the extent that the new 'Captain's Slow Running Test' criteria were passed, albeit on the rolling road. I have a feeling that the problem might have been the main motor worm not quite meshing sufficiently well with the first idler gear in the gearbox. This has now been rectified. I also attached the flywheel earlier. There's a lesson to be learned here, when fitting flywheels. It's a 2mm motor shaft (a Mashima 1424) and the brass flywheel didn't initially want to go on it. I then reamed the bore on the flywheel out, but only slightly. Even that was too much and the flywheel then wobbled irreconcilably on the shaft when power was applied. I had another flywheel and practiced reaming that out even more carefully on a spare motor and that was fortunately able to be a snug force fit on the 74XX motor. If it's that close you could heat the flywheel in boiling water then let it shrink to fit. 1 2 Link to post Share on other sites More sharing options...
RMweb Premium St Enodoc Posted April 11, 2020 RMweb Premium Share Posted April 11, 2020 3 hours ago, bgman said: I'm certain it can only get better with use. So they say... 1 Link to post Share on other sites More sharing options...
RMweb Gold Re6/6 Posted April 12, 2020 RMweb Gold Share Posted April 12, 2020 Impressively smooth! Well done 1 Link to post Share on other sites More sharing options...
RMweb Gold Popular Post Captain Kernow Posted April 15, 2020 Author RMweb Gold Popular Post Share Posted April 15, 2020 21 Link to post Share on other sites More sharing options...
RMweb Gold Popular Post Captain Kernow Posted April 19, 2020 Author RMweb Gold Popular Post Share Posted April 19, 2020 (edited) It's almost finished, after a few extra angst-ridden sessions trying to get it to run consistently smoothly and agonising about the pick ups. Work remaining to be done on the loco body (apart from painting and weathering) largely consists of adding to top front lamp iron and reinstating the rivet detail around the cab roof area, that was lost when it was being converted to a 74XX (this will be done using Archers transfers), plus the vacuum and steam heat pipes: Edited April 19, 2020 by Captain Kernow 23 3 Link to post Share on other sites More sharing options...
RMweb Gold Captain Kernow Posted April 19, 2020 Author RMweb Gold Share Posted April 19, 2020 And here's some footage, complete with tinkly music: 9 2 Link to post Share on other sites More sharing options...
RMweb Gold Brinkly Posted April 19, 2020 RMweb Gold Share Posted April 19, 2020 Very nice Tim. Best wishes, Nick. 1 Link to post Share on other sites More sharing options...
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