Search found 591 matches

by Martin Wynne
Sun Apr 21, 2019 9:05 pm
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 17
Views: 718

Re: rail/wheel profile - prototype has problems too

Hi Julian, I'm wondering if pin-point axles play any part in this. Is there any empirical evidence on the relative derailability of wagons with pin-point versus parallel needle bearings? Note that the prototype doesn't use pin-point bearings. Nor traditional tinplate train sets. If there is any end-...
by Martin Wynne
Fri Apr 19, 2019 8:51 am
Forum: Track and Turnouts
Topic: Turnout construction - Question here please.
Replies: 102
Views: 13215

Re: Turnout construction - Question here please.

After laying out the sleepers on the Templot which had double sided tape on it I marked the points where the rivet needed to go. The pen I used, the ink bleed into the wood rather than leaving a a dot, so next time get a different pen. Went to use the hole punch and the pin didn't penetrate the sle...
by Martin Wynne
Thu Apr 18, 2019 11:39 am
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 17
Views: 718

rail/wheel profile - prototype has problems too

The RAIB has published an accident report today which contains interesting information about the P1 wheel profile:

https://www.gov.uk/government/publicati ... ember-2018

Martin.
by Martin Wynne
Wed Apr 17, 2019 10:10 pm
Forum: Track and Turnouts
Topic: Crossing Vee Jig
Replies: 26
Views: 2671

Re: Crossing Vee Jig

Martin's magic engine tells me that I have Vees to build soon in BH rail to these specs 1:x where x = 4.53, 5.08, 5.5, 5.58, 5.6, 5.7, 6.16, 6.25, 6.38 as well as the common values, 5, 5.5, 6, 6.5, 7 etc I have recently acquired a copy of "GWR Switch and Crossing Practice", which I have r...
by Martin Wynne
Mon Mar 18, 2019 1:17 pm
Forum: Operating in Practice
Topic: Operational entertainment...
Replies: 34
Views: 5506

Re: Operational entertainment...

Tim V wrote:I think you have to consider if you are representing what happened on one day, on say 12 September 1932

That would make an interesting model. It poured with rain all day.

:)

Martin.
by Martin Wynne
Wed Feb 27, 2019 5:31 am
Forum: Track and Turnouts
Topic: Modelling loose heeled switches in 4mm
Replies: 34
Views: 2447

Re: Modelling loose heeled switches in 4mm

seanmcs wrote:I'd like to explore the GWR turnouts on Templot. Possibly would save me making up my own templates, as the printed ones are unsuitable. Can I look at it with a Mac?

Hi Sean,

Yes, there are 3 ways to run Templot on a Mac. Full details at:

http://templot.com/companion/for_you.php

cheers,

Martin.
by Martin Wynne
Wed Feb 27, 2019 5:09 am
Forum: Track and Turnouts
Topic: Modelling loose heeled switches in 4mm
Replies: 34
Views: 2447

Re: Modelling loose heeled switches in 4mm

"It is not widely appreciated that semi-curved switches came into use on the Great Western only in the 1930s and were used only for new construction. The older curved loose heeled switches remained in use into BR times." Hi Sean, The GWR did not use semi-curved switches. The flexible swit...
by Martin Wynne
Sun Feb 17, 2019 10:54 pm
Forum: Track and Turnouts
Topic: Modelling loose heeled switches in 4mm
Replies: 34
Views: 2447

Re: Modelling loose heeled switches in 4mm

p.s. Dave, If it helps to understand what's happening in a joggle, I have added a red line to the diagram: http://85a.co.uk/forum/gallery/2/2_171738_320000000.png The red line shows the position of the stock rail for a plain set with no joggle. To make the joggle, imagine the stock rail being held a...
by Martin Wynne
Sun Feb 17, 2019 10:28 pm
Forum: Track and Turnouts
Topic: Modelling loose heeled switches in 4mm
Replies: 34
Views: 2447

Re: Modelling loose heeled switches in 4mm

Martin , is the set the same where the stock rails have joggles ? Hi Dave, Yes, there is still a change in angle in the stock rail with a joggle. It's a slightly smaller angle than for a plain set because of the switch tip thickness. The object in all cases is to end up with the stock rail in the s...
by Martin Wynne
Sun Feb 17, 2019 10:47 am
Forum: Track and Turnouts
Topic: Modelling loose heeled switches in 4mm
Replies: 34
Views: 2447

Re: Modelling loose heeled switches in 4mm

The switch illustrated by Dave K causes me some concern, given the proximity of the tongue rail to the stock rail in the area I've indicated by a yellow ellipse Hi John, Dave, The photo illustrates well what happens when there is insufficient (or no) "set" in the diverging stock rail. Thi...
by Martin Wynne
Fri Feb 15, 2019 5:55 pm
Forum: Track and Turnouts
Topic: Modelling loose heeled switches in 4mm
Replies: 34
Views: 2447

Re: Modelling loose heeled switches in 4mm

junctionmad wrote:can Templot do this Martin ?

Hi Dave,

Sure. Click the set custom switch... button on the switch dialog.

More info on all this at:

http://85a.co.uk/forum/view_topic.php?i ... d=6#p19351

cheers,

Martin.
by Martin Wynne
Fri Feb 15, 2019 5:03 pm
Forum: Track and Turnouts
Topic: Modelling loose heeled switches in 4mm
Replies: 34
Views: 2447

Re: Modelling loose heeled switches in 4mm

Hi Dave, Loose-heel switches can only be modelled exactly to scale if you are using dead-scale flangeways. Even the overscale flangeways in P4 are border-line. In 00-SF and EM you must extend the length of the switch rails to the position where the heel offset provides at least 1mm flangeway clearan...
by Martin Wynne
Sun Dec 30, 2018 12:14 pm
Forum: Track and Turnouts
Topic: Track on bridges and viaducts
Replies: 8
Views: 947

Re: Track on bridges and viaducts

Plain rail spiked to the sleepers for the guard rails on Chirk Viaduct in 1989: http://85a.co.uk/images/chirk1_1989_960x740.jpg Starting well in advance of the viaduct in the facing direction, but finishing immediately at the trailing end. Chirk Aqueduct on the left: http://85a.co.uk/images/chirk2_1...
by Martin Wynne
Tue Dec 04, 2018 1:39 pm
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 270
Views: 30495

Re: Brimsdown-The last grand project.

Rubbish on the tracks alongside the platform at Ramsgate Harbour:

http://www.kentphotoarchive.com/kpa/sea ... enumber=19

Martin.
by Martin Wynne
Mon Dec 03, 2018 2:16 pm
Forum: Track and Turnouts
Topic: Colouring Sleepers
Replies: 24
Views: 2508

Re: Colouring Sleepers

I tried that on Saturday evening with a warm bag of PG Tips finest - and,sadly, nothing happened. However, as an prolific tea drinker, I have a plentiful supply of bags so do you have any tips on achieving success Martin? It's a long time since I last used the method. I used to put half a dozen tea...
by Martin Wynne
Sun Dec 02, 2018 1:45 am
Forum: Track and Turnouts
Topic: Colouring Sleepers
Replies: 24
Views: 2508

Re: Colouring Sleepers

Jeremy Good wrote:Has anyone found a decent, readily available product for staining the sleepers or are there any alternative methods I should consider?

If waterproof ply, soak in cold tea. If not, rub with a damp used tea bag (or even a new one).

cheers,

Martin.
by Martin Wynne
Sun Dec 02, 2018 12:25 am
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 270
Views: 30495

Re: Brimsdown-The last grand project.

Yes I found myself wondering the same thing. Is the clue in the pins...? Hi Andrew, Julian, I can't speak for Tony, but the traditional tracklaying method is: 1. tape template on cork. 2. place assembled trackwork on top and carefully align to template. 3. tap 3/4" or 1" veneer pins exact...
by Martin Wynne
Wed Nov 21, 2018 2:27 pm
Forum: Track and Turnouts
Topic: seeking tandem turnout template
Replies: 18
Views: 1662

Re: seeking tandem turnout template

The diverging track and the straight through are exactly as the Exactoscale A5. The centre track is equidistant between the two tracks of the A5 at it clears the turnout. Hi Jon, Unfortunately that produces a sub-optimal tandem. Equidistant straight exits require the two V-crossings to be exactly o...
by Martin Wynne
Wed Nov 21, 2018 1:35 am
Forum: Track and Turnouts
Topic: seeking tandem turnout template
Replies: 18
Views: 1662

Re: seeking tandem turnout template

Hi Jon, We seem to be at cross-purposes. Are you saying that the first turnout in the tandem has to be an exact match to an Exactoscale A-5 turnout? In which case the second turnout will need to be something like a B-9 or B-10 to get an even spread of exit tracks (if an even spread is needed?). Or d...
by Martin Wynne
Tue Nov 20, 2018 11:27 pm
Forum: Track and Turnouts
Topic: seeking tandem turnout template
Replies: 18
Views: 1662

Re: seeking tandem turnout template

I like the idea that I came to this back to front. Actually I had a track plan with a straight though and a diverging A5, but the real world track plan had a tandem at this point. The A5 curve was fixed as was the straight. Hi Jon, If the A-5 is already on a fixed alignment, I'm afraid this tandem ...
by Martin Wynne
Tue Nov 20, 2018 2:22 pm
Forum: Track and Turnouts
Topic: seeking tandem turnout template
Replies: 18
Views: 1662

Re: seeking tandem turnout template

This may be a question better put in Templot Club than here (but I'm logged in now so I'll ask it anyway!) - how did you work out the second turnout had to be an A-7? Is it one of those things you just have to know , or am I missing something obvious (I usually do)? Hi David, Short answer: 1. guess...
by Martin Wynne
Mon Nov 19, 2018 10:35 pm
Forum: Track and Turnouts
Topic: seeking tandem turnout template
Replies: 18
Views: 1662

Re: seeking tandem turnout template

I printed it out and found it is slightly too large (it comes out at scale 5' gauge, or 20mm) Hi Jon, When you print it from your PDF reader, it is very important to make these settings in the print dialog (which are not the default in most readers): jon_tandem3.png However, now that you have insta...
by Martin Wynne
Mon Nov 19, 2018 5:50 pm
Forum: Track and Turnouts
Topic: seeking tandem turnout template
Replies: 18
Views: 1662

Re: seeking tandem turnout template

Hi Jon,

Templot can do that (it's free). For a single-sided tandem you need to start with the 2nd turnout, which in this case needs to be an A-7:

jon_tandem1.png


jon_tandem2.png

The timbering will need some final adjustments.

cheers,

Martin.
by Martin Wynne
Wed Oct 24, 2018 11:42 am
Forum: Product Information
Topic: Chairs and Rail
Replies: 51
Views: 6466

Re: Chairs and Rail

Please can someone point me to the guidance for adding proper links to a post? Hi John, Bob, Right -click on this tiny barely visible icon on the relevant post: s4_links.png Then select Copy Link Location . And simply paste it into your reply: https://www.scalefour.org/forum/viewtopic.php?p=63968#p...

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