Friday, 31 December 2010

Point operation

In the build up to this layout, point operation was always going to be one of my first major hurdles. How to set the distance between the switch blades accurately was something I was struggling with especially when working to P4 standards. My previous attempts go back a number of years to copperclad points with a sleeper sized tiebars. I now wanted a more realistic solution. I understood that the switch blades would twist slightly when moving, this movement would, in time, break any solder joint on the blade unless there was some built in flexibility between the blades and the device used to move them. Even though I'd read many descriptions of different solutions, I still struggled with how best to go about it and which materials to use. It was not until I'd discussed my problem with two guys from the P4 group that I started see how to put a solution together. Also having access to layouts in the local area group has helped, I've been able to look, listen, and hopefully, learn.

My method is nothing ground breaking, all ideas have been borrowed from other modellers. I decided at an early stage to adopt Tortoise point motors and install all motors under the baseboard using Exactoscale's Tortoise Mounting Plates which gave me the horizontal motion. I just needed to decide on how to transfer this horizontal motion vertically through the baseboard to the switch blades.

Also a couple of guys stated that on their P4 layout they used 16.5mm as the distance between switch blades. This sounded too narrow to me but in checking dimensions it seemed OK for the centre to centre measurement between blades. My rough calculations are - P4 standards state a distance of 17.47mm between outer faces of the check rails - in reality on my points this has become 17.38mm - minus 0.9mm for width of rail gives a nominal 16.5mm. No doubt purists will put me right but at the moment it seems to work for me.

Hopefully the diagram below will help to explain the following verbal description.

I've used 0.5mm brass wire for the wire droppers soldered to the blades. Both wire droppers are bent slightly so that they are vertical to the centre of the blade when they pass though the baseboard. I then drilled the motion arm from the Tortoise mounting plate with two 1.5mm holes at 16.5mm centres. The hole was drilled to pass though the arm. Into each hole I then glued a 13mm length of 1.5mm brass tube. An 18mm length of 1.0mm brass tube, with an internal dimension of 0.5mm, was then soldered into the 1.5mm tube (18mm being the distance from the base of the motion arm to the top of the balsa wood track base). When installed, this will leave just the 0.5mm brass wire passing though the ballast layer. To help with installation when threading the motion arm onto the wire droppers under the baseboard, I cut the wire droppers to different lengths, 24mm and 22mm. When fitted, the wire droppers will protrude through the motion arm which means that the motor cannot be directly under the point but will be offset to one side of the point under the baseboard.


Elements described above ready for installation.

It is all very simple really..........that is, once you know what to do, what to use and how to use it.

Friday, 24 December 2010

A barren few weeks

I recently had a gentle reminder that I haven't posted an entry for a while but the title of this post says it all really. To progress the layout I needed a few items from Squires and Exactoscale. There was some confusion with the Squires order, all down to me I hasten to add, which delayed me finding the items by a couple of weeks. Then I posted the Exactoscale order which took a respectable fortnight to arrive.

While waiting for the above orders to arrive a WWII war game was arranged. This awoke some interest in looking though my mass of unpainted lead and I was side tracked a little by a couple of gaming projects. First a building that had been languishing in a box for many a year. I slapped a little paint on it and after gaining a feeling of achievement, I then picked up a second building to complete. One thing led to another and before I knew it I'd also started and finished a German artillery unit. Wargaming has definitely taken a back seat during this last year and I was gradually loosing interest in picking anything up to paint or finish off. So it was good to get stuck into some old projects that had been hanging around for far too long. I think it has also helped to clear and refocus my mind on the railway project. As they say 'a change is as good as a rest'.

With a little bit of luck I'm back on track (pun intended). I'm definitely not on schedule as I had hoped to have finished laying the track during Christmas with wiring completed and something running. I have made a start on finishing the switch blades for the second point, and now the extra bits from Exactoscale have arrived, I can start on the final point. A little progress has also been made on the 7 plank wagon but not enough to shout about. I've also been looking at some Bill Bedford W irons to see where I've gone wrong in folding them, more of which later........

May I thank all who have read this blog during the last year and for the encouragement and comments left. I truly hope you all have a happy and memorable Christmas.

Friday, 29 October 2010

Track at Baseboard Joints (part 2)

A further report on method 3 from my previous posting......

Not sure if this has been done before but it is only a twist on the plywood and rivet method. At the baseboard edge, holes have been drilled through the plywood sleepers, and through the balsa underlay into the plywood track base. Then 20mm long panel pins have then been pushed and lightly tapped into place.

Panel pins in place

Pin heads were cleaned with a light rubbing of a file and then tinned with a little solder. The underneath of the rail was also cleaned with a file and tinned before soldering the two together. I still need to apply cosmetic chairs to cover the joints. My soldering technique has been a little dodgy of late but after a little demonstration the other evening from a P4 area group member (Gordon), I'm hopeful that these joints will hold.

The start of the next point with chairs and rail in place.

As can be seen from the above photo, I'm going to trial plastic chairs glued directly to plywood sleepers on the opposite side of the baseboard joint to this point. If these fail I can always revert to another method..............

Saturday, 16 October 2010

Track at baseboard joints

On arriving home yesterday evening I had the surprise of finding a nice bulky envelope containing two Ultrascale wheel conversion packs. One for another Bachmann 8750 Pannier (to be 4694) and other for a Bachmann Class 08 Shunter. Better get my next order placed......... AND place my order for some 08 cranks that are being etched by my local P4 area group (Hi guys... could I have three sets please?).

As for progress on the layout............. my evening modelling time has again been difficult to find recently but track laying is progressing on the plank, all be it very slowly. One thing I've been struggling with is how to secure track at baseboard joints. I've been mulling over options and it looks like I'm going to trial at least three different methods.....


Method 1) At the joint at one end of the layout I'm trying C&L's Baseboard End Track Protectors. They look like they will work well but I'm a little concerned about the width of these protectors and the difficulty in disguising them. At the end I've chosen they are the perfect width for soldering the running rail and check rail to. This end they will also vanish under a covering of hard standing. I may be able to disguise them at the opposite end of the layout but at the middle joint I'm not sure how I can without extending the hard standing area across the baseboard joint.


C & L Baseboard end track Protectors (C1012)


Method 2) One suggestion that has been made by a member of my local P4 group is copperclad sleepers and brass chairs. At the moment I'm not that keen as, so far, no matter how hard I've tried I have not yet been able to paint a copperclad sleeper to match the wooden ones. I'm still going to give this method a trial on the layout though.


Brass chairs and copperclad sleeper


Method 3) I'm also thinking about hammering some panel pins into the plywood track sub-base through pre-drill wooden sleepers. Rail can then be soldered to the head of the pin and cosmetic chairs applied.


Pin and rail test solder

I'm now going to set myself up to be shot down in flames by all those who have much more experience than me. So here goes............


Method 4) With all the above said I still have a thought about using plastic chairs glued to wooden sleepers at baseboard joints. My theory is.....as the glue joint between chair and sleeper will be a weak point any damage should at least leave the sleeper and ballast intact. The above three methods would possibly stand rougher handling but any damage might be drastic. Not only would there be damage to rail and chairs but there might also be damage to sleepers, ballast and possibly the balsa underlay. With plastic chairs any damage should only require the rail and any damaged chairs removed then new rail and chairs installed. Hmmmm..... not sure if I'm brave enough to give this a try though................ I'll wait for the sound of those guns being fired..........


Hopefully with the longer evenings setting in I'll manage a few more hours each week and a few photos of my meagre progress.


Thursday, 23 September 2010

Buffer stops

Last night I spent a most enjoyable evening with one of the local areas Scalefour guys (Clive) discussing a buffer stop for Tredethy Wharf. Up until a few days a go I was going to use an old Mikes Models LSWR kit for a buffer stop. That was until I discovered, in my collection of photographs, a three quarter side view of the buffer stop at Dunmere Wharf. I remembered Clive offering me some jigs he'd made for building buffer stops on his layout so I'd asked to borrow them. But it's never that easy, on close inspection of the photo, we discovered the Dunmere stop has some seemingly unique features. More research is needed and Clive has asked for a scale drawing as a new jig might be needed..... Hmmmm.....but hopefully, with his help, I'll be able to build a reasonable representation for Tredethy Wharf.

I am quite excited by this little project..... more updates to follow...............

Friday, 10 September 2010

RCH 7 Plank wagon (Part 5)

It's been a while ...... and track laying on Tredethy Wharf is progressing slowly. I'm beginning to realise what I've started by using individual LSWR chairs........... and this is just a small/test plank layout!

As a slight distraction and with the encouragement of a recent article in the MRJ 200, I've picked up the RCH PO wagon again. A few months ago I'd put this wagon to one side after becoming dissatisfied with my attempt at painting the internal planking. It has been a long time since I've used enamels as all my wargaming painting has been with acrylics. The other barrier has been a mental one about painting a weathered wood effect. In my OO/EM days I'd made a few attempts at this and tried to represent replaced planks, and I never really captured the effect I was after.

Mulling things over I'd started to consider using acrylics when MRJ 200 arrived with the excellent article by Craig Welsh. This lead to a quick purchase of paints followed a couple of hours work, and I'm starting to feel I'm getting somewhere.

It's early days yet........ the planking needs toning down a little with grey washes; the metal work needs rust applying; the whole wagon needs weathering; need to apply running numbers...... but over all I am now feeling more confident about painting wooden wagons. Thanks Craig.

Saturday, 14 August 2010

Photographs by Ian Dinmore

I have come across a small selection of interesting colour photographs taken by Ian Dinmore. All are on the Railscot site. Three show weathered clay wagons and one is of the water trough at Pencarrow Woods with no train obscuring the view.

Boscarne Junction with a view of a short clay train from the guards van taken in 1982 here which also shows excellent detail/condition of the inside of a empty clay wagon.

Bodmin General with empty clayhoods here

Pencarrow Woods water trough here This is the first photo I've seen without a train in shot. Must have been taken from a Guards van.

Dunmere level crossing here

I like the last two photographs as they do show the intimacy that this line had with its surroundings. I do hope I will be able to portray this intimacy on Tredethy Wharf.