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Search results for: Bullhead
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... is much easier to file a vee after assembling it. Even easier if you use a disc sander. Below shows how a vee can be constructed to any angle matching the template, without needing filing jigs, and finishing with solid metal at the nose. I have greatly exaggerated the crossing angle for clarity. The rails are shown in cross-section along the rail -- yellow shows the rail head and foot, orange shows the web of the rail: 2_060749_540000000.png Make sure you have both rails the right way up. Bullhead rail has the thicker part at the top. A is a prepared piece of rail with the end bent to the crossing angle, or slightly less. Allow a little extra on the overall length. Then file the end down to the web as shown to become the splice rail. Make another one of the opposite hand as B, to become the point rail (nose). No need to file the end yet, but file a side notch in it to receive A as shown. The filing does not need ...
... -diamond"? Here are a couple of images to help explain.These are switch-diamond-crossings (i.e. they have movable K-crossings), but you can add slip roads to make them into slips, just as for fixed K-crossing diamonds. The two sets of moving switch blades at the centre always move together, in opposite directions: switch_diamond_10bh.jpg switch_diamond.jpg Notice that in a flat-bottom switch-diamond (lower photo) the switch tips (points) are carried on two separate timbers. In a bullhead switch-diamond (upper drawing) both switch tips share a common wider centre timber. Here is a switch-diamond in early FB track at Bilton Junction, clamped out of use. Photo thanks to Mick Nicholson: 2_221106_110000000.jpg Here is an excellent picture from Mick Nicholson showing a flat-bottom double-slip with movable K-crossings. As one switch blade opens, the other closes. You can see that this doesn't affect the provision of the slip roads in the other rails: fb_movablek_dslip.jpg© thanks to Mick Nicholson ...
... topic: 2152 Okay- I'm going to have a go posted: 4 Feb 2013 13:19 from: CoBo Having ripped up the scenic section of my layout, and following considerable encouragement from other members of the forum, I've now decided to take the plunge into designing and building a new section including hand-built trackwork. As my off scene fiddle yard area (which I'm quite happy with) is made up of Tillig& Peco 00 code 83, I've opted to go 00-SF code 75 bullhead rail soldered on copper clad 1.06mm sleepers for the new scenic section. I will obviously have to create/manufacture connecting pieces for the transition from code 83 to 75. This section of the layout is 10' x 6' 6" max, and was of course drawn with the invaluable help of TEMPLOT. 2626_040729_010000000.png The concept is a single line branch junction, steam with a few diesels using 3 coach trains. Due to cutbacks, part of the line is now disused and the station forms a terminus with run round facility. ...
... to drive the slip. Where would you suggest attaching the tie bars to operate the K crossings? One last question. How would I turn this into a double slip? Best regards Charles Attachment: attach_1586_2196_Slip_Try4.box 301 posted: 14 Apr 2013 23:50 from: Martin Wynne Charles Orr wrote: I intend to use to use servo motors to drive the slip. Where would you suggest attaching the tie bars to operate the K crossings? One last question. How would I turn this into a double slip? Hi Charles, Bullhead switch-diamonds usually have a single wide timber at the centre, carrying both sets of points (blade tips). The drive stretchers would usually be located on each side of the central timber. The switches always work together in opposition, so you can save some motor cost by arranging a rocking crank from a single motor. To make a double slip, simply repeat the process of adding a slip road, swapping the TCP and MCP positions for the additional slip switches. Also change the half-diamond settings for ...
... 1:8 should normally be switch-diamonds with movable K-crossings. The switch blades move across simultaneously in opposition. There is no break in the rail so no need for K-crossing check rails. If you build a 1:10 diamond with fixed K-crossings, you will very likely get mis-tracking and derailments. That's why the prototype doesn't allow them. For wider than scale flangeways such as 00 and EM, derailments are almost certain. Info from Templot Help notes: 2_120732_280000000.png Drawing of a bullhead 1:12 switch-diamond: 2_081530_450000000.png A modern switch-diamond double-slip. Quite common in flat-bottom, not so much in bullhead. Here's a close-up of the K-crossings: fb_movablek_dslip.jpg pic thanks to Mick Nicholson They are used when the crossing angle is flatter than 1:8. They make a model slip much easier to build, because there is no need to find space for the K-crossing check rails. The downside being you need 2 extra point-motors and stretcher ...
... share a single slide chair on a single timber- I don't think that would represent prototype practice- it would be worth doing a little research on the timbering and slide chair arrangements for the railway company your track is representing. Regards. Sorry, I forgot to state the obvious. But to be honest its a generic question.Anyway, its 16.5mm, 4mm. C&l rails and chairs. Its more a question about prototype practice, I am sure that the full size railwsy had the same question. Also, with a bullhead diamond, it is right that the tips both share the same sleeper. I'm sure I've read that on this forum somewhere.... posted: 8 Aug 2020 19:33 from: ikcdab wcampbell23 wrote: Hi- you don't state which scale, gauge, rail type and make of chairs you are working with- that would be a help with advice. Not every manufacturer's slide chairs are the same size- some have a deeper slide area. The simple work-around is to use two slide chairs where ...
87. RH_Curved tandem
... first place for this curved tandem. However, both of these options are likely to create other problems in the positioning of the additional V-crossing at 4. So instead c. Modify the check and wing rails to fit. This usually the simplest solution in practice. It is usually possible to shorten the length, or the flare length, or both, of check and wing rails without affecting the working performance too much, especially in low-speed locations in yards and sidings. You can also change from the usual bullhead bent flared ends to machined flares on straight rail. This is less common prototypically because it means making a special rail which can't be easily repaired or replaced on site by the p.w. gang. Here I have made such modifications. You can see that you need at least 14" scale between a V-crossing and the nearest running rail to be sure of a workable design: 2_031351_520000000.png In making the adjustment at 2 you must always be sure that there is full checking remaining opposite the gap in the V-crossing ...
... at Hither Green in c1967, where a rail joint broke. posted: 22 Jul 2020 22:07 from: Martin Wynne Julian Roberts wrote: I remember seeing track joints like the ones you describe Alan, in Belgium in the late 70s when I worked there for a year. I thought it looked a much better design than we used to have in Britain and wonder why it wasn't the way we did things here. Hi Julian, Some pre-grouping track used very close joint sleepers. The problem then with chaired bullhead track is that if you place the chairs so close to the joint, there isn't room between them for a 4-bolt fishplate, and shorter 2-bolt fishplates must be used. Experience was that 4-bolt fishplates are so much better at keeping the rails aligned and level that the joints required less maintenance, even with the joint sleepers further apart. Wider joint chairs are used on the end sleepers, so that the rail is supported as close to the joint as possible. (4mm joint chairs are now ...
... but mostly on the individual site conditions and traffic flows. For the timbering of a station throat no two locations will be the same. Diamond-crossings and slips are always equalized, at least within the middle section, because it is practically impossible to get all the K-crossing rail-fixings in the correct place if the timbers are square-on to one of the roads. Which means that it is easier to arrange the timbering of any connected turnouts if they are also equalized. For a traditional steam-era bullhead railway, my preference is to start equalized and only change it for say, running line crossovers. Until Templot2 the default in Templot was equalized. The equalized style generally allows fewer long timbers to be needed and less timber shoving. For modern flat-bottom track you will probably want to start square-on and only change it for diamonds and slips. The special crossing chairs must fit the rails in the specified positions, and must have a timber under them. This generally limits you for the amount by which the ...
... in a different colour. I suspect that you are not so much asking for a different colour, but for some means to mark individual timbers differently from the others. There has never been any demand for that in UK modelling, although modellers do often scribble notes on the templates. I believe in many other countries a popular construction method is to use soldered copper-clad laminate for just a few of the timbers, with plastic or wood for the remainder. (That wouldn't look good in the UK, at least for bullhead track, because chaired bullhead requires a different timber thickness from soldered construction). There are several clunky ways which you might achieve the desired result in Templot, but none very straightforward or helpful. For example you could duplicate a template, set a marker colour on the lower one, and then omit some timbers on the upper template in the shove timber functions so that the coloured ones from below show through. Or you could export template files, and edit and print them in a separate program. For example entities in ...
91. Minories
... curve and just adjust the plain track to suite. I think I will build the station throat first then see what happens after. I will be left with the outer triangle of space in the corner, I guess I could squeeze in an extra short siding or two, just to make use of the space posted: 1 Dec 2014 17:41 from: Martin Wynne Hayfield wrote: As its a retro layout I am building it in code 100 rail Hi John, For retro handbuilt track you should be using code 95 bullhead. I remember helping on a club layout of Bewdley in EM in the early 1970s which used such rail. I don't know where you would get it nowadays. It was listed by the old suppliers -- W&H, ERG, Bonds, Hamblings, etc. Martin. posted: 1 Dec 2014 18:29 from: Jim Guthrie Martin Wynne wrote: I remember helping on a club layout of Bewdley in EM in the early 1970s which used such rail. I don't know where you would get it nowadays ...
... : Jim Guthrie wrote: If you are adding pre-sets, I would quite like FS160 added. Hi Jim, Sure. Are these dimensions ok? Martin, These look fine. Many thanks- it saves making custom standards. Jim. posted: 25 Oct 2014 10:46 from: Martin Wynne Jim Guthrie wrote: These look fine. Many thanks- it saves making custom standards. Hi Jim, Bear in mind that selecting a gauge/scale pre-set still gives you the default UK-style REA bullhead settings. If you want a template with American timbering, rail sizes, adjacent track spacings, etc., it is still necessary to create a custom library template. regards, Martin. posted: 25 Oct 2014 11:10 from: Martin Wynne Hayfield wrote: Whilst we are talking pre-set gauges, how about please a couple of narrow gauge pre-set ones for the dummies like myself who struggle to add my own pre-set gauges. 00-9 and 0-16.5 would be really helpful ...
... topic: 2850 Worn-rail fishplate posted: 24 Feb 2016 21:22 from: Martin Wynne This is a special fishplate for connecting worn bullhead rail (on the left) to new or unworn rail (on the right). You can see how much the head depth of the rail has been worn down -- the stepped fishplate brings it back up level with the unworn rail. 2_241603_300000000.jpg It's unusual to see this within pointwork. It means the bridge chair supporting the worn rail needs a thicker base than the near one, as they are both on the same timber. Special chairs were made with thicker than the standard 1.3/4" base thickness for this type of situation. 2_250126_200000000.jpg It may possibly be 85lb rail on the left, rather than worn 95lb rail. The radiused top corner on the rail does suggest original rail rather than worn. The fishplate is clearly marked for 95R BH WORN/ NEW. BS-85R 85lb bullhead rail was originally intended for branch lines, sidings and yards, etc., but in practice ...
... a track standard of the Australian Model Railway Association. It is virtually identical to 4-SF (00-SF). However, it's important to understand that setting a scale and gauge in Templot does just that and no more. It doesn't set the timber spacing, rail section, or any other prototype data. There isn't such a thing as "H0 sleeper spacing". The timbering sizes and spacings vary with different prototypes. The default prototype settings in Templot for any scale or gauge are always UK-style REA bullhead. So simply selecting H0-SF gets you UK bullhead track at 3.5mm/ft. To set any other prototype data, the templates need to be customized accordingly. And then ideally saved as library templates for re-use. cheers, Martin. posted: 26 Feb 2020 11:11 from: Alan McMillan Hi Roy I'll only be using 4-SF as a gauge and flangeway standard and since I'll be building all the track myself, I can set the sleepering to whatever I want in Templot. I won't ...
... . However, deep breath, in a running line the timbers adjacent to a rail joint should be no further than 13 inches from the joint to the timber centre, i.e. at 26" centres maximum. Otherwise the joint won't be sufficiently supported and there is a risk of dipping and broken fishplates. In non-running lines such as crossover connections, yards and sidings, the spacings might be wider, although usually some attempt is made to get the timbers as close to the rail joints as possible. But, for bullhead track, the timbers can't be closer than 12 inches from the joint to the timber centre, i.e. at 24" centres minimum, otherwise there isn't room between the chairs for a standard 4-bolt fishplate. If necessary that can by got round by using shorter 2-bolt fishplates, or saddle chairs (which support the rail but have no jaws or keys), but such things are quite unusual to see in most bullhead track. For flat-bottom track the timbers can be closer to joints because the ...
96. 3D again?
... : Martin Wynne Andrew Barrowman wrote: Yes, FB rail. Not sure how it will be attached yet. Perhaps it will snap in. Check rails go all the way down- they will require some clever ballasting. Hi Andy, Thanks for the details. Yes, FB fill-in will be easier to disguise than BH. The chairs lift the BH rail 1.3/4" above the timbers and there is no way that could be hidden in ballast. Daylight below the rail is one of the defining features of bullhead track. I seem to have 3 options there: a. A water-sol washout support below the rails. That uses one nozzle, so the other one would have to do the whole thing. That makes it very slow if I use a nozzle small enough to get the full chair detail. b. Some other means of support filled in manually between the timbers after printing up to rail level. Not sure what that might be. (" not sure"= code for haven't the faintest idea.) ...
... Dec 2019 10:46 from: a_nummelin Rob Manchester wrote: Thanks Martin/John, The US model is rather expensive( around £130 inc shipping and Taxes) but would probably be great. I have posted on RMweb here to see what the GW one is like. Thanks Rob Photo is just to show the GW device, in use it should be in a more substantial vice. I've measured the grooves at 1.6mm wide by 2mm deep and 1.3mm wide by 1mm deep. 1520_160554_380000000.jpg I've never used it for rail but bullhead looks easy: could flat bottom be done by just having the rail foot in a groove? Ideally one would turn a groove to suit the rail profile, but if one can do that it would be better to build a unit from scratch completely. posted: 16 Dec 2019 22:41 from: Andrew Barrowman a_nummelin wrote: I've never used it for rail but bullhead looks easy: could flat bottom be done by just having the rail foot in a groove? Ideally one would turn a groove to suit the rail ...
... would be welcomed! I've used Templot and learnt how to do a couple of small layout designs but this one is more elaborate! Richie posted: 5 Oct 2017 07:53 from: Phil O Hi Richie Welcome to Templot Club. Yes it's possible to do the things you require in Templot. When you open up Templot you will get a non standard gauge turnout to alter this to EM go to the GAUGE menu and select 18.2 EM, all your templates will now be in EM gauge. To alter the rail from Bullhead to Flat Bottom, go to the REAL, RAILS and select HEAD& FOOT and your templates will be in flat bottom. When I construct fiddle yard track I only put a sleeper in at about inch spacings and tend to miss every other one out on turnouts except under the nose where I build as per template. HTH Phil. Last edited on 5 Oct 2017 07:54 by Phil O posted: 5 Oct 2017 11:01 from: Tony W Hi Richie. Further to Phil's reply, you may also ...
... . On the dialog which appears, tick the box for timber centre lines, and click continue. The rail centre lines are based on the settings for rail head width on each template at real> rails> rail section data... menu item. Make sure it corresponds to the actual model rail section which you are using. You can use the modify group to match function if you need to change multiple templates. The default setting is 2.75" which corresponds to the vast majority of UK standard-gauge rail, bullhead and flat-bottom, until recent times. In 4mm/ft scale, code 75 bullhead rail should match this, although rail from SMP Scaleway/Marcway is known to be narrower. regards, Martin. posted: 11 Nov 2015 10:32 from: Charles Orr Hi Martin, Your very comprehensive reply (as usual) has sorted everthing out. Many thanks. I am indeed going to use veropins and copper clad to build some turnouts that I will then chair, as discussed elsewhere. Now to work. ...
... topic: 2944 Selecting the correct Switch Crossing Angle posted: 7 Dec 2016 16:42 from: 4railsman I'm currently designing two new baseboards to fit between two existing stations built in 00FS with copperclad sleepers and code 75 bullhead rail, way back in the late 1970's. Fortunately, I still have unused sleepers, rail and tiebars, so can build new items that will be compatible. However, last time round, I built the points and crossings on top of my own scale drawings using various curved templates in the 24", 30", 36", 48", 60" radius with various frog angles. This time, I plan to use Templot to design the trackwork but I am at a loss to know which Switch Type& Crossing Angle to use when setting up at the beginning, as this layout is based on LPTB (ie pre London Underground). Looking at "Prototype pre-nationalisation bulkhead track turnout data" by Brian Oldford and Keith Norgrove (see http://www.clag.org.uk/protodata-bullhead.html) shows that ...
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