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| 7 1/4" Gauge Electric 0-4-0 Loco |
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| NickG:
Well - the true start of a new project... Before I moved house in June 2009, I bought some gears from Harrowgate Model Engineering Show, then followed my quest to find some motors. I had some kind offers from Bogs but decided I needed something slightly larger and found some from electric scooters on ebay - I also found a controller on ebay which came from China ... how did people do things 15 years ago without the internet? Here is a bit of the history of how this started: http://madmodder.net/index.php?topic=1147.0 I will post some pics up later of these bits and pieces. I guess moving house and setting up my workshop again got in the way of this project a bit, then I got a dose of :proj: and started making other things like flame gulpers and rocking engines! Anyway, as I said my son (now 4 1/2) is really pestering me now so I had a look around in the garage for material last night and found some useful bits. 3 bits of angle iron that is very square, exactly the same length - great, I don't really care what it is, I am just leaving it and bolting / maybe welding together for the frame! 4 bits of aluminium scrap from work will do for the wheels - people will probably have lots of opinions why not to use aluminium for wheels but it's almost ideal sizes and I think it'll work so am definitely using it- it's a high grade so should be ok. Again, pics will follow. I took the little toothed pulleys off the motor - they were held on with a circlip and loctite - just warmed them up with blow torch. As I am axle hanging the motors and the gears aren't that large, I needed to do some measurements. There is just enough room to squeeze 10mm dia. bar in for the axles. I may make the axles from more than one piece though and make them thicker where they go through the wheel and into the bearings. The rest just needs to transmit the torque which 10mm will easily do. I haven't decided yet whether just to use the 10mm all the way through - I know a lot of people will be thinking it's too thin, but as long as the bearings are close to the wheels it's more of a shear force more than a bending one and the shear strength of 10mm steel bar will be way more than enough. I also found some aluminium that I will use for the bearing housings and I might just put some thin plate over the ends of the frames to look like buffer beams. The body work will come later, at the moment I'm going to concentrate on trying to get a working chassis, also, my son hasn't decided whether he wants it to look like 'Rusty' the diesel shunter or 'Toby' the tram engine. He initially wanted Rusty but his little brother is called Toby so I have a feeling he might change his mind - normally changes with the weather anyway! So I need to buy some 5mm plate to hang the motors, some bearings and some 10mm bar for the axles. Another good thing about the 10mm bar is that the gears have a 10mm hole in them! I need to make it 7 1/4" gauge to get the motor between the wheels - might just be able to squeeze between 5" gauge but 7 1/4" will give me plenty of room. Downside is I won't be able to use it on our club's 5" portable track but then I won't really be using it for that anyway. :worthless: don't worry, will add some tonight! Nick |
| Stilldrillin:
Working for your kids. This is the start of a great project Nick! :thumbup: Really looking forward to watching it develop. :D David D |
| sbwhart:
This look mighty interesting Nick I think this would make a good Grandson project :proj: I came across a site by a Swedish guy doing quicki build of this typ of loco he was knocking them together in less than a week, I'll go surfing to try and find him. Stew |
| sbwhart:
Found him http://www.sci.fi/~animato/3003/3003bg.html http://www.saunalahti.fi/animato/steam/index.html Stew |
| NickG:
David, Am quite excited about this one too - always planned on making one but as usual never got around to it! I think I've just thought of a possible way I can do a quick temporary repair on my milling vice too :smart: :scratch: Stew, You posted those links in my other post, I was looking at them the other day - thanks! :thumbup: I like his designs and the use of windscreen wiper motors. Hopefully I'll have some progress to show after this weekend. Good news (ish) - the milling machine has just sold on ebay, planning to collect this weekend - bad news is after fees I'll only be getting around £247 - think that's about £100 less than I paid for it 12 or so years ago but needs must! Nick |
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