Templot Club Archive 2007-2020                             

topic: 1852Maximum template length
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posted: 1 Mar 2012 08:14

from:

Jerry
 
Mansfield, Notts - United Kingdom

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Paul Boyd earlier advised me to set out sweeping curves first of all.
On my Maidenhead (too ambitious?) plan I would prefer to set out the main lines in one sweep, but this means having the ability to extend the template for these 2 tracks to around 31,120 mm.
Is this possible, and how?

I know I can 'mirror on the peg' but this leads to a kink at the peg/notch where the two sections join when I apply swelling where they go through the station. These are/were high speed lines, especially the up-main, regarded by drivers as a sprint from Reading through to Paddington.  Even IKB knew this stretch would encourage high-speed running when he made the tracks rise at the London end, slowing the approach to the buffers.

Thanks for any help.

Jerry



posted: 1 Mar 2012 10:52

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Jerry wrote:
I would prefer to set out the main lines in one sweep, but this means having the ability to extend the template for these 2 tracks to around 31,120 mm. Is this possible, and how?
Hi Jerry,

A single template 31 metres long in 4mm scale? That's over 100ft. Is this a garden railway? :shock:

There is a way of doing this, but make sure you have saved a backup .box file first, in case Templot gets in a tangle.

All templates are created by stepping along them in fixed increments. There is a hard-coded limit of 3000 steps maximum per rail for each template. There isn't any way for the user to change this limit in any current version of Templot. I could perhaps make it adjustable, but this is the first time anyone has ever asked for such a thing.

What you can do instead is to change the size of each step. You should not to this for sharply curved templates otherwise they will become noticeably threepenny-bitted.

However if your template is 31 metres long it clearly isn't going to be sharply curved. :)

Go to main > program panel, and then click the program > expert > step size... menu item. Click the ? help F2 button and read the notes.

The default step size for 4mm scale is 6mm, giving a maximum template length of 3000 x 6mm = 18000mm.

Increase the step size just enough to allow the required template length. For example if you make the step size 11mm, the template length can go up to 3000 x 11mm = 33000mm.

The change applies to the current control template only, and you need to do this again for any existing templates if necessary.

Presumably you will be splitting this template into shorter ones, aligning templates over it, inserting turnouts in it, etc.? I strongly recommend that as soon as the templates are short enough you return the step size on them to the default 6mm. Otherwise you may find that you have inadvertently created an entire track plan with the longer step size, and some templates will be adversely affected when printed.

regards,

Martin.

posted: 1 Mar 2012 13:38

from:

Jerry
 
Mansfield, Notts - United Kingdom

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Thank you very much Martin,

Just for the record the Map distance of my plan is ~2300 yards. I will use your method with delight, as I was expecting to have to do some jiggery-pokery to get the length.

I do not expect to make the final layout that long, but there are several interesting features on the ground, including various refuges and spurs. My intention, once I have all these in proportion on the Templot plan is to create some curves to fold it all in on itself.

If its any solace I am known for trying things that others realise is very difficult or even impossible. I seem to achieve my objective in about 20% of cases. I once worked for a chief chemist who told a customer that a particular process could not happen; within a few months the competitor had done it and took all the business. A salutary lesson when you are 23.

Thanks again Martin.

Jerry

posted: 1 Mar 2012 14:41

from:

Jerry
 
Mansfield, Notts - United Kingdom

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Having now done as instructed, with great success, I can confirm that the radius of the Up and Down Mains work out at 190000 mm. No wonder it always seemed like a straight looking from the platforms. Following on from someone's questions about the accuracy of 1:2500 OS maps the layout I now see has enough room for all the turnouts which the surveyor put in.:thumb:



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