Search found 90 matches

by barhamd
Wed Nov 14, 2018 12:29 pm
Forum: Other Buildings and Scenery
Topic: Bridge arch question
Replies: 12
Views: 1750

Re: Bridge arch question

In the absence of a 'decent practical geometry book' (like I suspect 99.9% of British households) I resorted to the internet. I tried drawing a 3-centre arch and that fits reasonably over the picture (green line) bridge1.jpg I'm afraid I got completely lost trying to follow the instructions for cons...
by barhamd
Tue Nov 13, 2018 3:13 pm
Forum: Other Buildings and Scenery
Topic: Bridge arch question
Replies: 12
Views: 1750

Re: Bridge arch question

thanks everybody

I imported the picture into TurboCAD, reducing the colour depth to make it quick and easy but so I could still see the outline of the bridge. A combination of the digest pages, brick counting etc and I think I've got the right outline.
bridge.jpg

time for a mock up..

David
by barhamd
Mon Nov 12, 2018 3:54 pm
Forum: Other Buildings and Scenery
Topic: Bridge arch question
Replies: 12
Views: 1750

Bridge arch question

Hi folks Can anyone advice on how to work out (or whether there was a standard radius) what the arch of an overbridge might have been? I can see that there is obviously a different radius for the top of the arch than for the 'corners'. Would this have been an ellipse or two different radii? Prototyp...
by barhamd
Sun Nov 11, 2018 10:34 pm
Forum: Layouts and Operations
Topic: Stour Valley Dream - progress on P4 layout
Replies: 16
Views: 2629

Re: Stour Valley Dream - progress on P4 layout

Double Aahhhhhhh

Hence the question about radius and potential P4 layouts, as per another thread on here.
I'm dropping down to about 40" at the tightest spots, getting a continuous run in the room which is ~19'x9'

Unlikely to see a Pacific but a 4-6-0 is a possibility.

David
by barhamd
Sun Nov 11, 2018 5:45 pm
Forum: Layouts and Operations
Topic: Stour Valley Dream - progress on P4 layout
Replies: 16
Views: 2629

Stour Valley Dream - progress on P4 layout

While I've been regularly posting on rmweb about the P4 layout I thought that those here who don't both with that site might like to see progress. I now have the five main baseboards which feature Clare station built and the track down and wired. This weekend I had fun playing trains and produced a ...
by barhamd
Tue Jul 03, 2018 8:01 pm
Forum: Railway Buildings
Topic: Platform clearance
Replies: 10
Views: 2289

Re: Platform clearance

Yes those platform edging bricks were real beasts! IMG_6385.JPG I got the 3rd baseboard cut over the weekend and the cork underlay cut and marked up today. I've gone for making the underlay edge through the platform 20mm from the centre line, I reckon that should be about right. IMG_6431.JPG IMG_643...
by barhamd
Mon Jul 02, 2018 4:45 pm
Forum: Railway Buildings
Topic: Platform clearance
Replies: 10
Views: 2289

Re: Platform clearance

Yes, that overhang is about 2-3 inches max.
The platforms have received some re-pointing post closure but are still basically original.

David
by barhamd
Sun Jul 01, 2018 9:19 pm
Forum: Railway Buildings
Topic: Platform clearance
Replies: 10
Views: 2289

Platform clearance

The digest 62.0 gives the minimum clearance rail centre to platform edge as 4'9" = 19mm. The digest also shows the current requirement for a 1' overhang on the platform edge. What was the deal with early platforms which were just vertical with no (or minimal) overhang? I'm trying to work out ho...
by barhamd
Wed Jun 14, 2017 12:10 pm
Forum: Layouts and Operations
Topic: Brettell Road
Replies: 527
Views: 93514

Re: Brettell Road

9 bells on the railcar
David
by barhamd
Thu Dec 01, 2016 3:47 pm
Forum: Layouts and Operations
Topic: Canonbury Goods: NLR c.1903
Replies: 96
Views: 18897

Re: Canonbury Goods: NLR c.1903

Perhaps making something like
http://www.greenstuffworld.com/en/textu ... stone.html
would speed up the process?
David
by barhamd
Mon Oct 17, 2016 3:16 pm
Forum: Steam Locomotives
Topic: Furness J1 Class - Complete!
Replies: 39
Views: 6135

Re: Furness J1 Class - New Springy Experiments?

I think I'd much rather see an arrangement a bit more like we typically see with older etched brass chassis kits where the chassis is designed to be unsprung but with easy options to find hornblocks if you want. Would it be possible perhaps to design something which could easily be removed to allow ...
by barhamd
Thu Oct 06, 2016 12:58 pm
Forum: Baseboards and Carpentry
Topic: whats the state of the art in baseboards
Replies: 27
Views: 7753

Re: whats the state of the art in baseboards

I've just built the first two baseboards for my new scalefour empire http://www.rmweb.co.uk/community/index.php?/blog/186/entry-18176-first-2-baseboards-assembled/. 6mm laser cut ply, ply came from SLEC http://www.slecuk.com/

David
by barhamd
Tue Jul 05, 2016 12:15 pm
Forum: CHEAG
Topic: Any suitable exhibits - Pampisford?
Replies: 1
Views: 4210

Any suitable exhibits - Pampisford?

My brother, ex-editor of GERS journal and member of Cambridge University Railway Society, was approached by the Burwell Museum who are running an event on 11th August 2pm-5pm. The topic of the day is "Trains through Burwell" celebrating the Cambridge to Mildenhall Branch line and its Swaff...
by barhamd
Thu Jun 23, 2016 12:18 pm
Forum: Wagons
Topic: Monkey tails
Replies: 1
Views: 1060

Re: Monkey tails

I thought Brass Monkeys only came out in the cold weather, trying to find someone who does welding?

David
by barhamd
Fri Apr 22, 2016 1:09 pm
Forum: Tools and Techniques
Topic: Best way to fabricate multiple metal parts?
Replies: 32
Views: 6192

Re: Best way to fabricate multiple metal parts?

Draw up in a CAD package and then get PPD to etch them?
David
by barhamd
Mon Mar 21, 2016 12:01 pm
Forum: Steam Locomotives
Topic: Wheels for a J20
Replies: 9
Views: 2176

Re: Wheels for a J20

I hope I didn't give the impression it was that easy to trash them, I've trashed a good few Gibson wheels in my time too.


Not at all. I just thought that if someone of your experience was able to destroy an axle then a ham-fisted idiot like me was bound to do it!
David
by barhamd
Mon Mar 21, 2016 10:35 am
Forum: Steam Locomotives
Topic: Wheels for a J20
Replies: 9
Views: 2176

Re: Wheels for a J20

Thanks Will

I'm afraid that those posts just confirmed my believe that the exactoscale offering isn't for me. £20 an axle, not being able to use a GW wheel press and the possibility of trashing them completely are enough to put me off.

I think I'd rather live with .8mm undersized wheels.

David
by barhamd
Sun Mar 20, 2016 10:55 pm
Forum: Steam Locomotives
Topic: Wheels for a J20
Replies: 9
Views: 2176

Re: Wheels for a J20

Thanks Flymo

It was very unclear from C&L's website whether the wheels are actually available and just how big a mortgage you need to take out to buy them. I've always got on with Gibson's in the past..

David
by barhamd
Sat Mar 19, 2016 12:04 am
Forum: Steam Locomotives
Topic: Wheels for a J20
Replies: 9
Views: 2176

Wheels for a J20

Hi All According to the drawing from the GERS the J20 had wheels which were 4'11", 15 spoke, pin in line with spoke. I'm looking for options for wheels I'm thinking Mr Gibson's closest would be a 4'7 1/2", 15 spoke, pin in line described as Midland/LMS, ok if I can live with them being .8m...
by barhamd
Mon Mar 07, 2016 1:26 pm
Forum: Track and Turnouts
Topic: The 2mm Society'Easitrac' Point Kit
Replies: 45
Views: 7837

Re: The 2mm Society'Easitrac' Point Kit

I'm not sure about the merits of an P4 point kit, but absolutely convinced that the Scalefour Society, possibly dare I say in collaboration with the EMGS, should consider doing something to help with the 'single source' issue for chairs. I had wondered if advances in 3D printing from the like of Mod...
by barhamd
Tue Dec 01, 2015 11:03 pm
Forum: Chassis and Suspensions
Topic: Wagon Suspension Systems Discussion
Replies: 21
Views: 4107

Re: Wagon Suspension Systems Discussion

Whichever system you go for (personally I like the Bill Bedford ones from Eileen) get yourself one of the Brassmaster's spacing jigs. Sticking the etched W irons to the bottom of a wagon KNOWING it is square is half the battle.

David
by barhamd
Mon Dec 01, 2014 2:10 pm
Forum: Standard Gauge Workbench
Topic: Drakelow
Replies: 47
Views: 15106

Re: Drakelow

Hi Ian, Essentially it is two turnouts of the same hand reversed and interlaced. So called (on the GWR at least) because they were common in the sorting sidings at Barry Docks. And now we have the evidence -- a ladder of Barry slips at Barry: Martin. Thank you, Martin - an amazing photograph. I'm a...
by barhamd
Thu Nov 06, 2014 11:46 pm
Forum: Chassis and Suspensions
Topic: PenBits class 24 - with video
Replies: 1
Views: 1524

PenBits class 24 - with video

For those who might not see my blog on rmweb. http://www.rmweb.co.uk/community/index.php?/blog/186/entry-15100-penpits-sprung-chassis-with-video/ I've uploaded a video of my Class 24 chassis to youtube P_iuInXHUqw I'm very please with the kit from Penpits, the etching is excellent and even though th...
by barhamd
Tue Feb 04, 2014 2:45 pm
Forum: Railmotors, Railcars and Multiple Units
Topic: Heljan Railbus
Replies: 7
Views: 3268

Re: Heljan Railbus

The CLAG website at http://www.clag.org.uk/wheelbase.html says all the Railbuses were 3' wheels so I'll go for the 12mm

thanks
David
by barhamd
Mon Feb 03, 2014 8:17 pm
Forum: Railmotors, Railcars and Multiple Units
Topic: Heljan Railbus
Replies: 7
Views: 3268

Re: Heljan Railbus

Would P4 'blackbeetle' wheels do for the Waggon und Maschinenbau? I'm measuring the wheels as ~13mm in diameter with my calipers so I guess I go for the 12mm?

thanks
David Barham

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