Search found 589 matches

by billbedford
Thu Aug 08, 2019 9:15 am
Forum: Track and Turnouts
Topic: Modern Era Concrete Track
Replies: 26
Views: 792

Re: Modern Era Concrete Track

When you start on the concrete sleepered turnouts, remember the joiners and boltheads.....

IMG_1341.JPG


IMG_1340.JPG
by billbedford
Mon Jul 15, 2019 8:45 am
Forum: Guest Book
Topic: N7 Chassis Question
Replies: 20
Views: 1431

Re: N7 Chassis Question

I'm designing this chassis (and subsequently all my others) to incorporate working 4 point equalization and rapid and problem free assembly. To me this is especially important in the case of wanting multiple copies of the same prototype. ( I have 5 N7's to build so I can model a small part of the &...
by billbedford
Sat Jul 06, 2019 9:47 am
Forum: Chassis and Suspensions
Topic: Methods for Removable Loco Wheelsets.
Replies: 40
Views: 2383

Re: Methods for Removable Loco Wheelsets.

I often wonder about the economics of getting better components. Bearings for coupled axles are a good example: the cuboid kind that slide in hornguides. If the bearing blocks were accurately machined, then they could just slide in slots etched in the frames, without the hornguides, and it would be...
by billbedford
Fri Jul 05, 2019 9:20 am
Forum: Chassis and Suspensions
Topic: Methods for Removable Loco Wheelsets.
Replies: 40
Views: 2383

Re: Methods for Removable Loco Wheelsets.

I often wonder about the economics of getting better components. Bearings for coupled axles are a good example: the cuboid kind that slide in hornguides. If the bearing blocks were accurately machined, then they could just slide in slots etched in the frames, without the hornguides, and it would be...
by billbedford
Fri Jul 05, 2019 7:25 am
Forum: Chassis and Suspensions
Topic: Methods for Removable Loco Wheelsets.
Replies: 40
Views: 2383

Re: Methods for Removable Loco Wheelsets.

[quote="Jol Wilkinson"Many RTR locos have, as far as I know, some sort of removeable wheel set system with a keeper plate. However, the design concept is driven by production requirements and is part of a design unique to that particular model. If you can control every aspect of the design...
by billbedford
Fri Jul 05, 2019 7:12 am
Forum: Chassis and Suspensions
Topic: Methods for Removable Loco Wheelsets.
Replies: 40
Views: 2383

Re: Methods for Removable Loco Wheelsets.

That kind of comment is a bit self defeating - it is merely a different way, not necessarily better . And for a beginner, the complications of a CSB chassis is certainly a step to far. That does depend on whether the building is expected to bodge their CSBs onto an antiquated chassis design, or the...
by billbedford
Thu Jun 27, 2019 10:35 am
Forum: Tools and Techniques
Topic: Track cleaning
Replies: 62
Views: 3280

Re: Track cleaning

On the iPad or any other IO S device just hold down a key and a list of available accented versions of that letter will come up. It even has ^w and ^y for our Welsh friends.
by billbedford
Tue Jun 18, 2019 4:06 pm
Forum: Tools and Techniques
Topic: Track cleaning
Replies: 62
Views: 3280

Re: Track cleaning

zebedeesknees wrote:Full springing of all stock really helps; battery powered traction solves the problem.


As does steel rail.
by billbedford
Tue Jun 18, 2019 4:05 pm
Forum: Tools and Techniques
Topic: Track cleaning
Replies: 62
Views: 3280

Re: Track cleaning

by billbedford
Fri Jun 14, 2019 11:36 am
Forum: Tools and Techniques
Topic: laser welding
Replies: 11
Views: 679

Re: laser welding

I think TIG type spot welders would be better for what we do, even if the joint has to be flooded with solder afterwards. The laser welders would be useful where a small joint needs to be made with only local heating.
by billbedford
Fri Jun 14, 2019 9:46 am
Forum: Tools and Techniques
Topic: laser welding
Replies: 11
Views: 679

Re: laser welding

Having seen this video

,

I'm not sure that laser welding is something that has any relevance to our model making.
by billbedford
Fri Jun 14, 2019 8:34 am
Forum: Tools and Techniques
Topic: laser welding
Replies: 11
Views: 679

Re: laser welding

by billbedford
Thu Jun 13, 2019 8:14 am
Forum: Tools and Techniques
Topic: laser welding
Replies: 11
Views: 679

Re: laser welding

I’ve just seen on BBC’s “Repair Shop” a laser welder being used by a jeweller - looks just the job for fine “soldering” work. Only problem could be the cost... but laser cutters have reduced in price a great deal so there may be hope. Has any one had experience with this technique? See this from ab...
by billbedford
Thu Jun 13, 2019 7:51 am
Forum: Wagons
Topic: Waisted bearings for Bedford sprung W irons?
Replies: 23
Views: 1676

Re: Waisted bearings for Bedford sprung W irons?

Triode wrote:Is it necessary to do this while the W-iron etch is still flat (i.e. before the ends are folded up)?


Yes, you need the axlebox in its ultimate position, so that you can use the oval cutout in the w-iron as a 'pattern' for the hole in the axlebox.
by billbedford
Tue Jun 11, 2019 12:53 pm
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 2009

Re: REF: Rail wheel profile and "to do" list update

My position is that Nadel's formula is proven and the consequences are that models should be heavy (or at least heavier) compared with the worst expected impulses from bumpy track, and evenly and equally loaded per wheel. Looks like confirmation bias -- We like heavy stock, therefore heavy stock wo...
by billbedford
Sat Jun 08, 2019 4:18 pm
Forum: Wagons
Topic: Waisted bearings for Bedford sprung W irons?
Replies: 23
Views: 1676

Re: Waisted bearings for Bedford sprung W irons?

2. Find a way of making a slot in the cosmetic axlebox such that it can be fixed to the axleguard (W iron) but still leave freedom for the bearing to move within. I can see that forming a 2mm wide slot for this purpose can be difficult, and that using a drill bit larger than 2mm to create the neces...
by billbedford
Sat Jun 08, 2019 12:02 pm
Forum: Wagons
Topic: Waisted bearings for Bedford sprung W irons?
Replies: 23
Views: 1676

Re: Waisted bearings for Bedford sprung W irons?

Thanks for the replies. I’ve attached an image which hopefully illustrates the problem. Too little of the 2mm side portion of the bearing protrudes through the slot (due to the use of spacing washers on the inside). As a result, the axle end can move from side to side in the slot instead of just up...
by billbedford
Tue May 14, 2019 7:36 am
Forum: Guest Book
Topic: RE: Chassis Speed Building
Replies: 15
Views: 1662

Re: RE: Chassis Speed Building

I'm thinking minutes, not hours, for a properly designed chassis KIT. Every thing that is operational pre-shaped and fits what it is supposed to fit to. No parts to fettle, no parts or partial assemblies that need adjusting or measuring and cutting to size. But you must have an accurate wheel press...
by billbedford
Tue May 14, 2019 7:20 am
Forum: Chassis and Suspensions
Topic: Chassis Speed Building - Records and Methods
Replies: 17
Views: 1190

Re: Chassis Speed Building - Records and Methods

I'd ask a bunch of 20 year old Chinese girls to do it...
by billbedford
Sun May 12, 2019 9:12 am
Forum: Coaches and NPCS
Topic: Carriage identity query
Replies: 17
Views: 1227

Re: Carriage identity query

nf.newling wrote:Sorry guys, I see 8 equally sized windows and droplights only in the end doors - C70 for me.


Look at the deep shadows at the tops of the spaces between the windows, just the same as the end droplights.
by billbedford
Sat May 11, 2019 10:30 am
Forum: Couplings
Topic: Bill Bedford etched coach couplings
Replies: 2
Views: 548

Re: Singles and suspension

Sorry, I can't send this by PM.

E007-2 Instructions.pdf
(11.9 KiB) Downloaded 74 times
by billbedford
Sat May 11, 2019 8:12 am
Forum: Couplings
Topic: Bill Bedford etched coach couplings
Replies: 2
Views: 548

Bill Bedford etched coach couplings

Slight diversion - do you have a .pdf you could send me of the instructions of your now withdrawn carriage set couplings? Lost mine Mike You mean the cast brass ones? I don't think there were ever any instructions for them. You just bolted them on one coach and hoped for the best. I am working on s...
by billbedford
Sat May 11, 2019 7:47 am
Forum: Chassis and Suspensions
Topic: Singles and suspension
Replies: 14
Views: 849

Re: Singles and suspension

With a 3 mm difference in axle centres you should be able to arrange a CBS that goes over the carrying axles and under the driving.
by billbedford
Fri May 10, 2019 8:03 am
Forum: Chassis and Suspensions
Topic: CCU for LMS 6-wheel Bogie
Replies: 9
Views: 711

Re: CCU for LMS 6-wheel Bogie

Mark Tatlow wrote:I will use one of my sliding axle solutions


Your sliding axle solution? You mean this one? Note the date.
by billbedford
Mon Apr 22, 2019 8:07 am
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 2027

Re: rail/wheel profile - prototype has problems too

An Easter Day debate revolves in my mind Will. I don't see how the scaling effect of physics favours us particularly. A 16 ton wagon scaled down 76.2 x 3 times gives us 32g 16 tons was the permitted load. The tare was 7-8 tons. So a mineral wagon could weigh anything between 7 and 26 tons, and the ...

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