Theakerr Posted February 8, 2017 Share Posted February 8, 2017 Just take Chris to the bottom of Steep Hill in Lincoln and challenge him to walk up. 1 Link to comment Share on other sites More sharing options...
RMweb Gold JCL Posted February 8, 2017 Author RMweb Gold Share Posted February 8, 2017 It's what the concrete brick was for, but the issue with the cutter means the corners weren't square, so there's not much to be done. I do have a second one that came out well, so this one is sacrificial. Although... seeing photos of these, If I shim up the underneath to make sure the wheels are square, the lack of really straight lines would be quite prototypical! 2 Link to comment Share on other sites More sharing options...
RMweb Premium uax6 Posted February 8, 2017 RMweb Premium Share Posted February 8, 2017 Usual though they go 'hog's backed' but I suppose some must have twisted like yours. Be careful to sort that beading out if you are going to keep it.... Andy G Link to comment Share on other sites More sharing options...
RMweb Gold chris p bacon Posted February 8, 2017 RMweb Gold Share Posted February 8, 2017 Just take Chris to the bottom of Steep Hill in Lincoln and challenge him to walk up. Visited last year and annoyed the wife by walking up it wih ease. Nice day out to see Magna Carta. Back on topic. As it's MDF keep a weight on it for a few days and it should take the twist out, it's notorious for bending and twisting depending on how it's stored. 2 Link to comment Share on other sites More sharing options...
RMweb Gold JCL Posted February 9, 2017 Author RMweb Gold Share Posted February 9, 2017 That's the thing about Lincoln - very literal with their place names. That said, I used to live at Wheelbridge, Havenhouse - there was a bridge with wheels on it there. Problem is Dave, the MDF was flat, but the cutter was getting a bit free-range on its 90 degree angles. I mentioned to Mike that I didn't expect to check that 90 degrees was just that. It seems that the bar on the x axis had become not quite square. This was the coach that had the small breeze block resting on top of it. Link to comment Share on other sites More sharing options...
RMweb Gold chris p bacon Posted February 9, 2017 RMweb Gold Share Posted February 9, 2017 How long was the block on it for? Usually with MDF if it's mishapen it can be forced into another plane, although thinking about it, it only sticks up about 1-1.5mm which it could spring back to......hmmmmm... I'd be tempted to use it as your test piece but to the finished standard, then when you've done with it put some weight on it and alternate it between a damp/dry enviroment and see if that works. I've some 6mm mdf in the workshop at present which is cut into 300mm squares and I'm having to keep weight on it overnight until it's fixed in place to stop it moving. 1 Link to comment Share on other sites More sharing options...
RMweb Premium uax6 Posted February 9, 2017 RMweb Premium Share Posted February 9, 2017 It almost needs over bending and then straightening again. Maybe a spray with a mist of water and then resetting it would help. But the question now is what will happen to the built up coaches over time? Andy G Link to comment Share on other sites More sharing options...
RMweb Gold chris p bacon Posted February 9, 2017 RMweb Gold Share Posted February 9, 2017 It almost needs over bending and then straightening again. Maybe a spray with a mist of water and then resetting it would help. But the question now is what will happen to the built up coaches over time? Andy G I wouldn't spray any water over MDF it will just soak it up like a sponge and expand. The completed ones will be fine, they are tabbed and glued and will only lose their shape if forced to (hence the block on top) Link to comment Share on other sites More sharing options...
RMweb Premium uax6 Posted February 9, 2017 RMweb Premium Share Posted February 9, 2017 Ah yes. But I wouldn't use MDF for anything.... Andy G Link to comment Share on other sites More sharing options...
RMweb Gold chris p bacon Posted February 9, 2017 RMweb Gold Share Posted February 9, 2017 Ah yes. But I wouldn't use MDF for anything.... Andy G It's actually a much maligned material, for these it will do the job perfectly well and is not that much different in the thickness Jason's using to card. I use it for the core of buildings sometimes as if treated correctly it will be fine. It's just not much use as a stepladder or diving board........ 1 Link to comment Share on other sites More sharing options...
LNER4479 Posted February 9, 2017 Share Posted February 9, 2017 Just take Chris to the bottom of Steep Hill in Lincoln and challenge him to walk run up. Walking is for wimps... Link to comment Share on other sites More sharing options...
RMweb Gold chris p bacon Posted February 9, 2017 RMweb Gold Share Posted February 9, 2017 Walking is for wimps... After you sir......I insist.... Link to comment Share on other sites More sharing options...
MikeTrice Posted February 13, 2017 Share Posted February 13, 2017 As Jason has stated previously, for a while he had problems with the laser cutter not cutting square. A while ago he sent me a set of parts for one of his 6 wheelers to build. Unfortunately these were cut before the problem was identified but with that in mind I went ahead anyway just to see how things went. Having a central core of 1mm mdf results in a very strong assembly which simplifies building considerably. This is where I have got to so far: As Jason has dreaded the photos are at a very cruel enlargement ;-) All parts were sprayed with Halford's Grey Primer before being assembled and laminated with slightly thinned washable PVA. 5 Link to comment Share on other sites More sharing options...
RMweb Gold JCL Posted February 13, 2017 Author RMweb Gold Share Posted February 13, 2017 Hi Mike That gap bottom-left on the midle photo - did the mdf curl at all? I think the top of the side does look like the 90 degree problem that the cutter had. I definitely need to look at the sides and see why they aren't long enough there. Link to comment Share on other sites More sharing options...
MikeTrice Posted February 13, 2017 Share Posted February 13, 2017 The mdf did not curl. The base/background sheet on which the model rested was not flat. Although there is a small amount of twist along the length of the coach there is not much. Link to comment Share on other sites More sharing options...
MikeTrice Posted February 15, 2017 Share Posted February 15, 2017 Teak effect applied using my usual technique but to get a slightly darker finish I have used Vandyke Brown oil paint for the graining. I must admit I quite like this combination: And yes, I did put the panelling on wonky! Here is an even darker finish over the base Vallejo orange again using the Vandyke Brown: 8 Link to comment Share on other sites More sharing options...
RMweb Gold chris p bacon Posted February 15, 2017 RMweb Gold Share Posted February 15, 2017 That looks good Mike, I tried oil paint years ago without success but might try again with the different base coat. Link to comment Share on other sites More sharing options...
RMweb Premium uax6 Posted February 15, 2017 RMweb Premium Share Posted February 15, 2017 Looks a lot like the varnished mahogany that certain companies used. Do you cut a flat brush to help get the graining? Andy G Link to comment Share on other sites More sharing options...
MikeTrice Posted February 15, 2017 Share Posted February 15, 2017 No, it is an unmodified Golden Taklon flat brush approximately 1/4" wide. Link to comment Share on other sites More sharing options...
RMweb Gold JCL Posted February 16, 2017 Author RMweb Gold Share Posted February 16, 2017 Following Mike's fantastic photos, I feel like I'm about to come on stage with a two string banjo, following a song by [insert your favourite music star's name here], but here goes. The carcass of the 45' composite has been staring at me waiting to be clothed, so I've done something about it and at least put a shirt on it. Not nearly as tidy as Mike's, but a lot better than I thought I could do.To wring out a bit more from the metaphor as it lies sobbing on the ground utterly spent, only the spectacles and hat to go. Adding running boards to the bogies will be interesting... 9 Link to comment Share on other sites More sharing options...
daryl43068 Posted October 23, 2017 Share Posted October 23, 2017 Fantastic work! Just found this thread and been scrolling through, your work is very inspiring! Thanks for sharing your G1 chassis on Shapeways, I ordered one the other day, looking at scratch-building a G1 with a rake of D3D coaches. Keep up the good work! 1 Link to comment Share on other sites More sharing options...
RMweb Gold chris p bacon Posted October 23, 2017 RMweb Gold Share Posted October 23, 2017 Thanks for sharing your G1 chassis on Shapeways, I ordered one the other day, looking at scratch-building a G1 with a rake of D3D coaches. Did you just order the Chassis or either of the G1 bodies ? I've built one and it runs a treat. http://www.rmweb.co.uk/community/index.php?/topic/57208-sandy-gn-lnwr-or-bre/page-13 Starts around page 13 for a couple of pages. Let me know if you need anything. 1 Link to comment Share on other sites More sharing options...
daryl43068 Posted October 24, 2017 Share Posted October 24, 2017 Did you just order the Chassis or either of the G1 bodies ? I've built one and it runs a treat. http://www.rmweb.co.uk/community/index.php?/topic/57208-sandy-gn-lnwr-or-bre/page-13 Starts around page 13 for a couple of pages. Let me know if you need anything. Thanks Dave! Just the chassis for now, I plan on scratch building the body, although the 3D printed body looks very nice! Thanks for sharing your progress on your G1, will certainly help when I come round to motorising it! 2 Link to comment Share on other sites More sharing options...
RMweb Gold JCL Posted October 28, 2017 Author RMweb Gold Share Posted October 28, 2017 Hi Daryl - anything we can do to help, just shout. 1 Link to comment Share on other sites More sharing options...
Theakerr Posted November 24, 2017 Share Posted November 24, 2017 Jason, You probably know about it but just in case you don't there is an article, with some drawings, about the waiting room at Havenhouse in the July 1997 RM Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now