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SHMD

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About SHMD

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    Manchester

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  1. I spent way too many hours today making just one connector block - and it's not finished yet! However I am very pleased with it, not only because of the dimensions, but also the proportions look good too. As a plus It is also very strong, but I will need to Counter-Sink the two free holes and source some SS M2 x 4mm screws. Then I can mount it the right way up and have it fully populated with the correct number of screws. For this Instrument I'll need to make 14 long block (as shown above) and 2 square blocks. I'll make them out of Nickel Silver instead of brass though. (I only had brass to hand this morning.) This is just part of, (like every part of this build), a feasibility study for when I make some "good" block Instruments later. Kev..
  2. I finally got some wood, of the right size, and found a bit of time from all that working from home rubbish. (I used to think that if I worked from home I could do all sorts of modelling. Turns out the opposite is true!) Anyway, two cabinets side done in two days! I wonder if Any G (uax6) recognises the pattern of holes? Kev.
  3. Hi Jonathon and welcome, Although I must say it's partially your fault that I am designing a wagon TT - Your lovely Mills are just crying out for a WTT or two! I know you use LibraCAD but which CAD program did you use for the above 3D rendition of a TT? Kev.
  4. Thanks Compound, The extra length of rail due to the narrower gauge is not much (45.07-44.15=0.92mm in 00) but the extra flange depth really takes up a lot of extra rail (44.14-47.35=3.21mm in 00). (Constants used in the above calculations:- 16.5 18.83 12' 10' 1" 3" Pi) Great Phots - a wealth of detail there. Interesting thought there Guy - thanks. Kev.
  5. Thanks becasse, That's pretty much what my CAD work showed - just about possible if everything was perfect but really not possible in the real world - unless anyone knew better! In OO, you need a bigger diameter table for 10' wheelbase wagons. Just spent an hour watching follow-on films after enjoying the LNWR "Electric Capston" use demonstration/safety film. Many, many thanks. Kev.
  6. Fascinating! So much quicker, and easier, than I ever expected. Such a wealth of information. Kev.
  7. I wouldn't bother unless you know Dominic... Kev.
  8. A good turn out tonight. I did get the feeling, (I have no idea how!), that this was some sort of finale though. (I have shown my appreciation, most weeks, by my own free will and sincerely hope I have not offended anyone.) Kev.
  9. Thanks Stubby, I thought the same thing, with notches in the rail tops, to stabilise wagon positions. I then thought that a small shim, added to the TT surface next to the rail ends, would also work. I then thought about having this shim in the gap between the running rail and the check rail would perform the same function but would also be out of sight. If the wheel flanges are 1mm then I need to add something so that there is only 0.8mm from that to the rail top. The Wheel will then have to climb 0.2mm to exit the TT. With these "shims" located out on the circumference then the "slight bump" just looks like the transition from TT to fixed track. I tried this with a cut down sleeper. I seemed to work well. NOTE! - 9' wheelbase. This is an "ATLAS code83 90degree X-ING" The rail lengths are exactly 2inchs. This gives a TT diameter of 53.41mm or 13'4.23". 13'4.23" is an odd size so I'm going to call it 13'.6". Here is a 10' wheelbase wagon. I really wouldn't want a smaller diameter table than 13.5'! (I know I've got it on the wrong rail...) The ALTAS 90degree X-ING has the advantage that it is ready made, but also, each rail is electrically connected along its' length. The disadvantage is that (in one direction) any wheel flanges, that are too deep, will short out the two parallel rails, (it's about 1.8mm deep so Lima pan-cake cutter wheels are not allowed) . You can see this in the above photo. The other disadvantage is that the gauge is wide! I varies between 17.0mm and 17.2mm but the check rails worked very well! I still don't know if the UK 12' Wagon TT could turn 10' wheelbase wagons or not! Kev.
  10. Deep red preserves night vision, not Blue. I suspect Blue was chosen as it was not (then) used by any Signal aspects. (Not sure about hand lamps though...) Kev.
  11. Here I have drawn a 12' diameter wagon turntable to see where the Bachmann 10' wheelbase flanges come above rail the top. A 12' diameter turn table will have rail lengths of 44.77mm in OO gauge. The 10' Wheelbase Wagon's flanges will come above rail tops at centres. It's the scale 3" flanges that are the problem. If I use a 13' diameter table then everything clears - just - but how common were 13' wagon turntables? Even at 13', the wagon would have to be positioned to within 0.8447mm!! So an even larger table would be prudent to turn 10' wheelbase wagons? Kev.
  12. Thanks Mark, I was aware that Buffers, coupling, dangly-bits and wagon overhangs didn't matter - (as long as they didn't interfere with adjacent tracks, especially running lines) - but it is the wheel diameter and its' flange that will protrude into the fixed rails around the table thus stopping the turn table spinning! I'll post some CAD which illustrates the problem. Kev.
  13. Quick question:- Did the humble 12' diameter wagon Turn Table accommodate 9' or 10' wheelbase wagons maximum? Kev.
  14. Barnard Castle! - You really couldn't make this up!!! Kev.
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