murrayec Posted October 3, 2016 Share Posted October 3, 2016 I have the design of the chassis and running gear complete, but this project has been on the shelf while doing the DARTs, though I am tipping away at the bogie frame sides and here is the story so far;.... The motors will be Tenshodo Spuds with a little brass truck to carry the third axle, this affair will pivot off an etched brass side frame mount fixed to the Spud body- I've yet to make one of these to test. So with that decided! I set about working up the patterns for the bogie sides which will be cast in white metal. The photos show the main side frames cut out and part cleaned up, cut from 1mm black styrene, it's a bit softer than the white stuff. Each frame is in two bits and will be stuck together to give 3d look. The white cut-out laid on top is cut from never-tare paper which will be used for detailing the frames, and the springs are made of plastic- cast from a mould made from a M3 bolt, only half the bolt is cast for making up the springs. M3 bolt thread is a bit small and not the right scale, I might re-visit that one.... Next step is to work out the shock absorbers and mounts and all should be ready to glue up!! Eoin Quote Link to comment Share on other sites More sharing options...
Mike 84C Posted October 3, 2016 Share Posted October 3, 2016 That's looking good. Eoin Quote Link to comment Share on other sites More sharing options...
Kirley Posted October 3, 2016 Share Posted October 3, 2016 Delighted to see the progress you are making on these Eoin. Looking forward to seeing it in white metal. Quote Link to comment Share on other sites More sharing options...
DiveController Posted October 5, 2016 Share Posted October 5, 2016 Delighted to see the progress you are making on these Eoin. Looking forward to seeing it in white metal. +1 Quote Link to comment Share on other sites More sharing options...
Jimbo325ci Posted October 5, 2016 Share Posted October 5, 2016 Coming along nicely. Looking forward to the final product Quote Link to comment Share on other sites More sharing options...
murrayec Posted October 26, 2016 Author Share Posted October 26, 2016 Hi I have progressed a little further on the patterns I re-made the springs with a coarser 3mm bolt which gives a better spring look and more to scale, the shots are of the components going together- some are glued down and others not until the glue is cleaned up.... .....There is not enough hours in the day! Eoin Quote Link to comment Share on other sites More sharing options...
irishthump Posted October 26, 2016 Share Posted October 26, 2016 Jayzus, that's stunning work, Eoin! Quote Link to comment Share on other sites More sharing options...
Kirley Posted October 26, 2016 Share Posted October 26, 2016 The detail on the bogie side looks fantastic Eoin, once you are satisfied with the components is casting the next stage? Quote Link to comment Share on other sites More sharing options...
Weshty Posted October 26, 2016 Share Posted October 26, 2016 Nice. I like your approach. Flashbacks to doing the old Y33... Quote Link to comment Share on other sites More sharing options...
DiveController Posted October 26, 2016 Share Posted October 26, 2016 Jeepers! That's looking well now, Eoin=D Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 4, 2017 Author Share Posted May 4, 2017 Hi Kirley These photos are for you to see progress, I'm about to clean the bogie side patterns up and give them a paint to see if any filling is required. Then its on to making moulds and doing some test casting.... Sorry about the photo quality, the phone has gone funny n all dark Eoin Quote Link to comment Share on other sites More sharing options...
John-r Posted May 4, 2017 Share Posted May 4, 2017 Superb work, well done Eoin . Quote Link to comment Share on other sites More sharing options...
Noel Posted May 4, 2017 Share Posted May 4, 2017 Absolutely stunning Eoin. Had you considered the suitability of Black Beetle 27:1 gear ratio motor bogies for your A or C class projects? They are expensive but seem the biz. Quote Link to comment Share on other sites More sharing options...
Kirley Posted May 4, 2017 Share Posted May 4, 2017 Thanks Eoin, they are just breath-taking in detail. Roll on the casting stage. Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 5, 2017 Author Share Posted May 5, 2017 (edited) Absolutely stunning Eoin. Had you considered the suitability of Black Beetle 27:1 gear ratio motor bogies for your A or C class projects? They are expensive but seem the biz. Yes Noel The Beetle requires more head room by either raising the chassis or having a cut out in the chassis the size of the Beetle! This is a problem in a Class C with holes in the floor and not much floor left for other stuff, especially with two motors. The Class A is not so bad as its longer but this all happens under the cabs in both models. As far as I can remember the Beetle does not have the axle spacing for an A, the Spud does! The Spud fits nicely under the chassis and its more economical Eoin Edited May 5, 2017 by murrayec Quote Link to comment Share on other sites More sharing options...
Weshty Posted May 5, 2017 Share Posted May 5, 2017 Ohhh I like those, especially the Dampers. Quote Link to comment Share on other sites More sharing options...
DB JOE Posted May 6, 2017 Share Posted May 6, 2017 will those bogie sides be available for purchase??? will you be doing the C class sides also???? Stunning work Quote Link to comment Share on other sites More sharing options...
Mike 84C Posted May 6, 2017 Share Posted May 6, 2017 They look really good, all of a sudden I am not so happy with the look of my A class Quote Link to comment Share on other sites More sharing options...
DiveController Posted May 6, 2017 Share Posted May 6, 2017 will those bogie sides be available for purchase??? will you be doing the C class sides also???? Stunning work He's doing a whole chassis. The bogie sides look great! Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 6, 2017 Author Share Posted May 6, 2017 will those bogie sides be available for purchase??? will you be doing the C class sides also???? Stunning work Yes DB JOE, they will be available pretty soon - €25.00 for a loco set kit, and €25.00 for a detailing pack kit which includes 4 ladders and piping. The Class C bogie sides are complete but I'm remaking the moulds with the A's above- I had a lot of trouble with the first moulds! There is info here for the Class C stuff;- http://irishrailwaymodeller.com/showthread.php/4121-Class-C-ECMCHAS-For-Silver-Fox-Kit?p=62234&viewfull=1#post62234 Eoin Quote Link to comment Share on other sites More sharing options...
DB JOE Posted May 6, 2017 Share Posted May 6, 2017 brilliant will make a purchase for sure when both become available!! will you be making the chassis for the A and C with the twin motor bogies available too???? just had a look at that C class thread and it looks great Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 6, 2017 Author Share Posted May 6, 2017 Hi DB Joe Yes both chassis will have two motors, its easier and more economical that way, and it has more power! Eoin Quote Link to comment Share on other sites More sharing options...
DB JOE Posted May 6, 2017 Share Posted May 6, 2017 HI Eoin, that's great when they become available ill put in an order Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 7, 2017 Author Share Posted May 7, 2017 Test etching of the bogie frames and third axle trucks was done today;- Two brass .28mm sheets were prepared and artwork laser printed onto trannies, this caused a few irritations as the cheepo trannie film I have distorts with the heat of the printer, I got over this by printing each side artwork on separate sheets- seems to be less distortion in the middle of the sheet. This is the brass with Puretch processed on, UV'd and developed- worked out pretty well. Puretch is a photoresist that comes in sheet form sandwiched between sheets of mylar, peel one side off and squeegee the exposed side onto the brass with distilled water- in the dark room of course. After UV exposure the second sheet is removed and then pop it in the developer solution. Etching then took about 1 hour in 'Edinburgh Etch' - ferric chloride with a dash of citric acid, I found this idea online to enhance the ferric chloride action and make the ferric last longer. It cuts through fairly OK, a bit of a raggedy line but nothing a file cant clean up, the cusp has to be removed anyway. All filed and cleaned up ready for soldering. All soldered up and ready to pop in a pickle for the night. Some problems have come clear on assembly- might go for thicker brass sheet next time, I will add some gussets to this test to make the assembly more rigid! You can sort of see the lay of the land in the second photo- the spud sits in the frame which is clamped on through the spud, the clamp will be the pivot support and fixing for the truck out front! Looking forward to popping the spud in and giving it a wherrr.... Eoin Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 8, 2017 Author Share Posted May 8, 2017 Hi Test assembly was done tonight, all went OK but those gussets mentioned earlier are required, could not face switching on the iron- been soldering DART stuff all day! The front truck pivots on an axle bearing with a bolt down through a brass sleeve to hold the bottom clamping plate, the bolt will be the other way around on final assembly. A NS wire spring will push down on the truck and spring it centrally. This shows the bottom clamping plate which will have a joggle in it to keep it centred on the edge of the Spud. Articulation! And some shots with the bogie side pattern blue-tacked on Cant really run it until its beefed up Eoin Quote Link to comment Share on other sites More sharing options...
DiveController Posted May 9, 2017 Share Posted May 9, 2017 That's looking well, Eoin. Looking forward to seeing it in action over some pointwork. Quote Link to comment Share on other sites More sharing options...
Kirley Posted May 9, 2017 Share Posted May 9, 2017 An excellent and innovative piece of engineering Eoin. Quote Link to comment Share on other sites More sharing options...
Noel Posted May 9, 2017 Share Posted May 9, 2017 Stunning detail Eoin. Quote Link to comment Share on other sites More sharing options...
StevieB Posted May 9, 2017 Share Posted May 9, 2017 Your arrangement with the leading axle effectively makes a Co-Co into a 1Bo-Bo1, although in reality the 1 indicated a non-powered axle. Stephen Quote Link to comment Share on other sites More sharing options...
Weshty Posted May 9, 2017 Share Posted May 9, 2017 That is a lovely piece of work Eoin. And home etched and everything, now THAT is impressive. Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 10, 2017 Author Share Posted May 10, 2017 (edited) Thanks all for the comments Here is a video taken this evening of the first bogie beefed up and under test, all went well except it trips up on the insulated frog points as its not carrying any weight. The second bogie is nearly done so I can then attach them to the chassis plate with weight on and test again... It does work rather well at speed, I'm going test putting some weight in the truck also Eoin Edited May 10, 2017 by murrayec Quote Link to comment Share on other sites More sharing options...
Noel Posted May 10, 2017 Share Posted May 10, 2017 Thanks all for the comments Here is a video taken this evening of the first bogie beefed up and under test, all went well except it trips up on the insulated frog points as its not carrying any weight. The second bogie is nearly done so I can then attach them to the chassis plate with weight on and test again... It does work rather well at speed, I'm going test putting some weight in the truck also Eoin Interesting and good progress Eoin. Thanks for taking the time to post the video. Is the bogie 6 or 4 wheel pickup? Quote Link to comment Share on other sites More sharing options...
murrayec Posted May 10, 2017 Author Share Posted May 10, 2017 Thanks Noel Its 4 wheel pickup- the spud motor, but there's 2 motors in the chassis so overall the chassis will be 8 wheel pickup Eoin Quote Link to comment Share on other sites More sharing options...
popeye Posted May 10, 2017 Share Posted May 10, 2017 I was thinking that if the bogie sides were moulded from resin then maybe you could attach the front axle to the bogie sides instead of the brass bracket. Quote Link to comment Share on other sites More sharing options...
RichL Posted May 11, 2017 Share Posted May 11, 2017 Just wondering if this will have room to fit broad gauge wheelsets? Quote Link to comment Share on other sites More sharing options...
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