Templot Club Archive 2007-2020
|
|||
| author | remove search highlighting | ||
|---|---|---|---|
|
posted: 11 Apr 2012 09:46 from: Stephen Freeman
click the date to link to this post click member name to view archived images |
Hi, I know it's only a little niggle but it is leading to people making mistakes. Templot leaves the break where it would be on a Diamond Crossing. On a Slip it needs to be one timber nearer the common crossing. This is because you need the stock rail(s) to have one 'normal' chair (OK I know strictly speaking it isn't but you know what I mean) before the rail-joint, otherwise you are relying on the first slide rail chair as an anchor point for the rail. You can get away with this using soldered copperclad timbering but it isn't right and just try it with plastic chaired track..... When converting to a slip is it possible to make Templot do the alteration automatically? |
||
|
posted: 11 Apr 2012 10:57 from: Martin Wynne
click the date to link to this post click member name to view archived images |
Borg-Rail wrote:Templot leaves the break where it would be on a Diamond Crossing. On a Slip it needs to be one timber nearer the common crossing.Hi Stephen, It's not Templot leaving it there, it's the user.  To move the rail joint -- real > V-crossing options > customize V-crossing > wing rail front... menu item. The whole idea in Templot is that you set up your templates to match the prototype, which in this case varies a lot for slip designs. On the GWR there is no rail joint there -- the wing rail and switch stock rail are a single piece of rail. That works for 3-rail, live steam, clockwork and battery models only. For 2-rail models you must have an isolating gap for the V-crossing. There is already an option to automatically shorten the check rails for use in 1:6 and 1:7 slips, so logically I could add an adjustment to the wing rail fronts, and the timber spacings for the moved rail joint, at the same time. But it's not simple, it has to be coded as an override rather than a change to the normal settings, otherwise it can't be turned off again later. Generally it would be better for users to make such changes themselves so that they know what's happening and why. Modellers who have reached the stage of building slips are not beginners. On a single slip it is strictly necessary to shorten the wing rail front on one side only. A standard wing rail could be used on the other side, staggering the joints. The NER pre-group drawing shows such an arrangement. But this is a) not possible in Templot without splitting the wing rails out as partial templates, and b) requires two close-spaced timber positions for the rail joints instead of only one. On balance I think it's unlikely for the later REA designs. Anyone know for sure? Is it shown in the LNER 1926 book? (My copy is not to hand at present.) regards, Martin. |
||
|
posted: 11 Apr 2012 11:41 from: Stephen Freeman
click the date to link to this post click member name to view archived images |
GWR? Not necessarily so. Please see.Double Slip at Par Page 58 GWR Switch and Crossing Practice. | ||
|
posted: 11 Apr 2012 12:19 from: Martin Wynne
click the date to link to this post click member name to view archived images |
Borg-Rail wrote: GWR? Not necessarily so. Please see.Double Slip at Par Page 58 GWR Switch and Crossing Practice.Hi Stephen, True. But see the 1:6 slip drawings on pages 60-61. And looking at the 1:8 slip in the pic on page 84 I can't make out a rail joint between the knuckle and the switch. Which illustrates the difficulty of getting definitive prototype data for a specific location.  regards, Martin. |
||
|
posted: 11 Apr 2012 12:25 from: Stephen Freeman
click the date to link to this post click member name to view archived images |
Page 84 - thought I could just make out a fishplate, with some magnification. | ||
|
posted: 11 Apr 2012 12:37 from: Martin Wynne
click the date to link to this post click member name to view archived images |
Borg-Rail wrote: Page 84 - thought I could just make out a fishplate, with some magnification.I can't, with a lot of magnification. Perhaps we should have poll on the subject? I'll get out some Paddington drawings later and see if I can find anything. Martin. |
||
|
posted: 11 Apr 2012 13:20 from: Martin Wynne
click the date to link to this post click member name to view archived images |
Martin Wynne wrote:I'll get out some Paddington drawings later and see if I can find anything.I found it easier than I expected, I should have done that in the first place. Drawing R.1783 Chief Engineer's Office, Paddington, August 1938, amended 1957. In the bottom left corner is a table of dimensions for "Wing Rails in Diamonds and Compounds" for angles in 1/4 steps from 1:6 to 1:8. "Compound" is the GWR term for a slip. They are all long wing rails (no joint) as shown in David Smith's drawing. The position of the joggle and hole drilling for the switch slide chairs and old-style stretcher bar is also given. The most interesting detail here is that these wing rail dimensions apparently apply also to plain diamond-crossings. So that means some more timber shoving for GWR modellers. I believe scans of these drawings are available on the Scalefour Society web site. edit: yes, see: http://www.scalefour.org/resources/GWRtracknotes/R1783.pdf regards, Martin. |
||
|
posted: 11 Apr 2012 14:20 from: Stephen Freeman
click the date to link to this post click member name to view archived images |
Hi, Yes I have found some photographic evidence to support the continuous wing/stock rail. Unfortunately for most people they will still require a rail break for insulation/polarity purposes. Now how to make an invisible insulated joint? Filler and paint? |
||
|
posted: 11 Apr 2012 15:04 from: Paul Boyd
click the date to link to this post click member name to view archived images |
Unfortunately for most people they will still require a rail break for insulation/polarity purposes.Yup - I take the view that as I have to have a break for electrical purposes, I might as well make that break look prototypical (fishplated) even if it isn't  |
||
| Please read this important note about copyright: Unless stated otherwise, all the files submitted to this web site are copyright and the property of the respective contributor. You are welcome to use them for your own personal non-commercial purposes, and in your messages on this web site. If you want to publish any of this material elsewhere or use it commercially, you must first obtain the owner's permission to do so. |