Search found 532 matches

by Guy Rixon
Fri Sep 20, 2019 5:01 pm
Forum: Steam Locomotives
Topic: Any Wheel and size!
Replies: 77
Views: 9674

Re: Any Wheel and size!

Previously I have made the wheels a tight fit in the tyre with a bit of glue so they stay put. I have used Gibson tyres in the past but if I can get tyres CNC machined the I would design the tyre so that the centre has a more positive location. The fit I can get on an axle is similar to that of a G...
by Guy Rixon
Fri Sep 20, 2019 4:49 pm
Forum: Wagons
Topic: Attaching axleboxes and buffers
Replies: 10
Views: 339

Re: Attaching axleboxes and buffers

For internally-sprung buffers, I prefer to assemble them separately from the vehicle and then to fit them with glue. For me, this is easier than trying to set the buffer throw and secure the ram when a buffer guide is fixed to the headstock. I use a very small amount of CA glue applied to the buffer...
by Guy Rixon
Wed Aug 21, 2019 7:34 pm
Forum: Steam Locomotives
Topic: LT&S 442T "Thundersley" Tank
Replies: 5
Views: 653

Re: LT&S 442T "Thundersley" Tank

If you go with the CDC print there are a few issues to consider. First, you have to choose the printing material. Choose between "versatile plastic" and "smooth fine detail plastic". The former has poor surface finish and needs lots of work with filler and sanding to make it read...
by Guy Rixon
Sun Aug 04, 2019 5:33 pm
Forum: Guest Book
Topic: A possible new P4 wheel source
Replies: 6
Views: 1297

Re: A possible new P4 wheel source

Andy, have you considered wheels as shown, but with inserts to represent Mansell wheels? A shallow recess turned into the front could hold an etched or printed insert.
by Guy Rixon
Sun Jul 21, 2019 11:07 am
Forum: New Products
Topic: Rixon Finescale Models
Replies: 17
Views: 4031

Re: Rixon Finescale Models

I hadn't done those particular brakes, but I've done them now. They are a sprue of 10 assemblies, rather than 8 in the previous products, to get best value from the printer and avoid SW's price-floor of $7.50 per print.
by Guy Rixon
Fri Jul 05, 2019 9:34 am
Forum: Tools and Techniques
Topic: Adhesive for coach glazing
Replies: 3
Views: 327

Re: Adhesive for coach glazing

Bizarrely, Deluxe materials Card Glue also works for sticking acrylic glazing to hard materials. I suspect that it works better on painted brass than bare metal. But I shall switch to the Everbuild product if I can find where where to buy it.
by Guy Rixon
Fri Jul 05, 2019 9:05 am
Forum: Signals and Control Systems
Topic: Signalling for Tingley Common
Replies: 39
Views: 2462

Re: Signalling for Tingley Common

Going back to the track layout as modelled, and assuming that the loop is used as a running loop or refuge, what is more likely for trains passing from the loop to the next section: a dummy at the loop exit and an advanced starter; or a running signal, level with signal 8, to enter the section and s...
by Guy Rixon
Fri Jul 05, 2019 8:43 am
Forum: Chassis and Suspensions
Topic: Methods for Removable Loco Wheelsets.
Replies: 40
Views: 2743

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 Guy Rixon
Sat Jun 15, 2019 7:50 am
Forum: Tools and Techniques
Topic: Eames 40 flux
Replies: 10
Views: 962

Re: Eames 40 flux

steve howe wrote:Out of interest, I did a bit of searching and found this supplier on Amazon:
I think Tamiya thinners is basically isopropyl.
Steve

Yes, but there's some butanol in it too, possibly to stop it drying too quickly when airbrushing.
by Guy Rixon
Sat Jun 15, 2019 7:44 am
Forum: Tools and Techniques
Topic: Track cleaning
Replies: 62
Views: 3611

Re: Track cleaning

Some switch cleaners dissolve plastics, particularly polystyrene. Does the WD40 contact-cleaner do that?
by Guy Rixon
Wed Jun 12, 2019 5:11 pm
Forum: Wagons
Topic: Waisted bearings for Bedford sprung W irons?
Replies: 23
Views: 1882

Re: Waisted bearings for Bedford sprung W irons?

Fix the axle box to the w-iron first, then use a 1.5 or 1.8 mm ball fraizer in a Dremel type mini drill. Place the cutter in the slot while it is stationary, then pulse the drill at a slowish speed until you have removed enough of the axlebox without cutting into the w-iron. A foot control for the ...
by Guy Rixon
Tue Jun 11, 2019 5:27 pm
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 2211

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

A thought about models with moving suspensions: the vertical force needed to defeat rail-climbing, as in the Nadal analysis, can be more easily defeated by friction if the vehicle is light. I suggest that the frictional force in the suspension, which opposes downward movement of each wheel, goes app...
by Guy Rixon
Tue Jun 11, 2019 7:12 am
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 2211

Re: Weight matters!

Re my previous post of around April 25. Re Nadel's formula and Dave Bradwell's analysis, but correctly taking into account the added downward constant force due the vehicle weight, it is clear that rail climbing derailments are reduced by making the vehicle heavier, regardless of the suspension sys...
by Guy Rixon
Sat Jun 08, 2019 1:15 pm
Forum: Wagons
Topic: Waisted bearings for Bedford sprung W irons?
Replies: 23
Views: 1882

Re: Waisted bearings for Bedford sprung W irons?

Complicating matters, the waisted bearings from AGW have changed recently. The ones I bought at the York show this year are visibly different from those bought a year ago, at least on the outside. On the recent ones, the parallel, 2mm-OD part is deeper than before, the tuning pip on the tip is wider...
by Guy Rixon
Mon May 27, 2019 12:34 pm
Forum: Exhibitions
Topic: RAILEX 2019
Replies: 54
Views: 6011

Re: RAILEX 2019

I found Leysdown unexpectedly compelling. Normally, I don't get much from these minimal-BLT layouts, but Leysdown had enough variety of movement and just enough sense of place (flat, coastal, population density tends to zero) to grab me. For me, the sound effects were a big plus. Also, it worked fla...
by Guy Rixon
Sat May 25, 2019 8:43 am
Forum: Standard Gauge Workbench
Topic: Queensbridge Road Wharf
Replies: 62
Views: 15233

Re: Queensbridge Road Wharf

The red brick mixed into the stock brick suggests a drastic repair. Was it wartime damage?
by Guy Rixon
Wed May 22, 2019 11:01 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 5889

Re: Joggled Stockrails

What happens if, instead of joggling, one files away the rail head to the same extent as the joggle? This would be filing a vertical-sided rebate, not cutting away under the railhead to house the toe of the switch.
by Guy Rixon
Fri May 17, 2019 1:36 pm
Forum: Guest Book
Topic: RE: Chassis Speed Building
Replies: 15
Views: 1812

Re: RE: Chassis Speed Building

Here's a challenge: how do I quickly and reliably build motor bogies for models of EMUs and electric locos? This should be simpler than easy-build chassis for models of rod-coupled steam engines, so maybe there's a way to make one in an afternoon without manufacturing parts. My spec: - For P4, eithe...
by Guy Rixon
Fri May 17, 2019 1:12 pm
Forum: Guest Book
Topic: RE: Chassis Speed Building
Replies: 15
Views: 1812

Re: RE: Chassis Speed Building

Personally, I find the idea that assembling an effective (internal and hidden) chassis mechanism in an hour from precision mating parts is regarded as "speed building", rather than an acceptable norm, rather puzzling. It's not as if one has to wind one's own 7 pole motor, cut one's own ge...
by Guy Rixon
Sun May 12, 2019 10:38 am
Forum: Guest Book
Topic: RE: Chassis Speed Building
Replies: 15
Views: 1812

Re: RE: Chassis Speed Building

If a chassis can be built in minutes from a kit, it follows that the kit eliminates most of the possible mistakes. Otherwise, the build will take either hours, to allow for the anti-cock-up checks, or days, to reverse and repair the cock-ups. I find kit building much more enjoyable when I know I'm u...
by Guy Rixon
Sun May 05, 2019 1:22 pm
Forum: Wagons
Topic: RCH Wagon Drawings
Replies: 11
Views: 1126

Re: RCH Wagon Drawings

Thanks for this. The GA for the 12-ton mineral seems to be that reproduced in the Ince Wagon Works book, which has always been my first reference for RCH details. It's great to have that and associated drawings available in better resolution.
by Guy Rixon
Mon Apr 22, 2019 8:32 am
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 2174

Re: rail/wheel profile - prototype has problems too

A few years ago, the American Passenger Transport Association were evaluating a proposal to adopt a different wheel profile for LRT trains, one with a greater flange-contact angle. The idea was to allow higher speeds on sharp curves. Makes me think that a less-prototypical profile might help our ov...
by Guy Rixon
Sat Apr 20, 2019 11:42 am
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 2174

Re: rail/wheel profile - prototype has problems too

A few years ago, the American Passenger Transport Association were evaluating a proposal to adopt a different wheel profile for LRT trains, one with a greater flange-contact angle. The idea was to allow higher speeds on sharp curves. Makes me think that a less-prototypical profile might help our ov...
by Guy Rixon
Thu Apr 18, 2019 7:20 pm
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 2174

Re: rail/wheel profile - prototype has problems too

A few years ago, the American Passenger Transport Association were evaluating a proposal to adopt a different wheel profile for LRT trains, one with a greater flange-contact angle. The idea was to allow higher speeds on sharp curves. Makes me think that a less-prototypical profile might help our ove...
by Guy Rixon
Sun Apr 14, 2019 8:42 am
Forum: Wagons
Topic: problems making wagon brakes
Replies: 8
Views: 1139

Re: problems making wagon brakes

The clearance between blocks and wheels in resin-printed brake gear can be whatever one wants, given that the prints are dimensionally accurate. Shapeways prints seem to be accurate. I've tended to larger-than-scale gaps to accommodate variation in wheel sizes (e.g. AGW are slightly smaller than Exa...

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