Search found 524 matches

by Guy Rixon
Sat Jun 15, 2019 7:50 am
Forum: Tools and Techniques
Topic: Eames 40 flux
Replies: 10
Views: 581

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: 51
Views: 1621

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: 1121

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: 1555

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: 1555

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: 1121

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: 4856

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: 56
Views: 12808

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: 54
Views: 3104

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: 1397

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: 1397

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: 1397

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: 819

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: 1655

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: 1655

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: 1655

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: 869

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...
by Guy Rixon
Fri Apr 12, 2019 10:07 am
Forum: Wagons
Topic: problems making wagon brakes
Replies: 8
Views: 869

Re: problems making wagon brakes

The problem part of this brake hanger, from the point of view of printing, is the 0.75" flat bit. Everything else can be brought (just) above minimum thickness for resin-printing, or is invisible and can be left off: 0.5" flanges that wrap round the middle bearer: invisible, leave them out...
by Guy Rixon
Fri Apr 05, 2019 3:04 pm
Forum: Starting in P4
Topic: P4 wagon Compensation(springing)
Replies: 31
Views: 2114

Re: P4 wagon Compensation(springing)

... but as a side note, how do you adjust buffer height? For most stock, you need packing between the floor of the wagon and the brass of the axleguards. For most plastic kits, where the bottom of the floor is sitting at the prototypical height w.r.t the rest of the model, you need 0.5mm packing. T...
by Guy Rixon
Sat Mar 30, 2019 2:41 pm
Forum: Product Information
Topic: Miscellany Models
Replies: 7
Views: 761

Re: Miscellany Models

These look very nice indeed. I've just been reading the instruction for the Fox bogies, which may suit some of my SECR coaches. Concerning those instructions, a few points remain unclear to me, even after a second reading. [*] Are the pins one which the coach body bears included or not? At one point...
by Guy Rixon
Tue Mar 26, 2019 11:43 am
Forum: Product Information
Topic: Exactoscale Products
Replies: 74
Views: 17123

Re: Exactoscale Products

An Exactoscale back-to-back gauge (17.75mm back-to-back) has just come up on ebay, in a lot with some track gauges.
by Guy Rixon
Tue Mar 19, 2019 2:56 pm
Forum: New Products
Topic: SCC - Sparkshot Custom Creations
Replies: 263
Views: 41859

Re: SCC - Sparkshot Custom Creations

If prototypical accurate door and commode handles can't be printed as separate items, then can they be printed attached to the side but with the relevant air gap behind the handle so that they look more realistic than the moulded on handles on plastic moulded coaches? Or is that asking too much? II...
by Guy Rixon
Mon Mar 18, 2019 11:18 am
Forum: Operating in Practice
Topic: Operational entertainment...
Replies: 34
Views: 6225

Re: Operational entertainment...

But it did make me wonder about proper layouts - steam age stations would have been busy busy, but a terminus layout where an 0-6-0 sorts out coaching stock doesn't really exist does it? Rakes of coaches don't make for shunting puzzles and what's the point of your mainline locomotive only appearing...
by Guy Rixon
Mon Mar 18, 2019 10:41 am
Forum: New Products
Topic: SCC - Sparkshot Custom Creations
Replies: 263
Views: 41859

Re: SCC - Sparkshot Custom Creations

What are the options for 3rd-party door furniture these days? I seem to remember etched T-handles and loop-handles being available back in the '90s. Personally, I would have no problem gluing in etched door-handles, but filing up a train's worth of handles from pin heads would be a bit daunting. I n...
by Guy Rixon
Mon Mar 11, 2019 2:50 pm
Forum: Steam Locomotives
Topic: GWR, London Transport lines safety trip-cock
Replies: 10
Views: 719

Re: GWR, London Transport lines safety trip-cock

A LURS article on safety devices suggests that the tripcocks first appeared on MDR A-stock in 1903 and rapidly became standard. Therefore, one would expect them on GWR 633 class and Metros working over the inner circle to Smithfield from c.1905. AFAIK, the Widened Lines were not protected in this wa...

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