Search found 564 matches

by Guy Rixon
Sun Feb 16, 2020 9:16 am
Forum: On My Workbench
Topic: High Level 03 Chassis Build
Replies: 44
Views: 7889

Re: High Level 03 Chassis Build

Chassis has been constructed and now being painted prior to final building. However High Level provide some excellent footplate overlays, has any one tackled these? If so what did you bond them on with? I was considering 3M spraymount? An aeromodeller I follow recently identified a Loctite gel-glue...
by Guy Rixon
Sat Feb 15, 2020 9:30 am
Forum: David B
Topic: On the Road
Replies: 43
Views: 13143

Re: On the Road

The delivery tricycles are interesting but I can't see how they are powered (I can make out the drive chain). Were they petrol, electric or pedalled?
by Guy Rixon
Mon Feb 10, 2020 1:57 pm
Forum: Trains: Model and Prototype
Topic: A question of colour
Replies: 18
Views: 1293

Re: A question of colour

Concerning dyes, yes they're different to paint pigment, notably in that they are soluble. However, a "lake" paint is made by precipitating soluble dye into insoluble particles of pigment. For example, Alizarin, an organic dye, plus alum yields madder lake.
by Guy Rixon
Mon Feb 10, 2020 10:08 am
Forum: Trains: Model and Prototype
Topic: A question of colour
Replies: 18
Views: 1293

Re: A question of colour

What is really needed is a chemist who knows how to make a black paint! When I worked in a factory, in another life, we dyed man made materials black but, there is always a but, there was no such thing as a black dye. We had to mix different colours to make black and one of the main ones was red. N...
by Guy Rixon
Thu Feb 06, 2020 12:41 pm
Forum: Starting in P4
Topic: Another newcomer's question re wagon suspension
Replies: 54
Views: 2403

Re: Another newcomer's question re wagon suspension

Consider an 2mm-diameter axle with the ends turned down to 1mm-diameter stubs, starting just clear of the wheel seat. Now cut those stubs into 55-degree pinpoints. This should allow shorter axles in shallower cones of 60-degree opening.
by Guy Rixon
Wed Feb 05, 2020 9:05 am
Forum: Starting in P4
Topic: Another newcomer's question re wagon suspension
Replies: 54
Views: 2403

Re: Another newcomer's question re wagon suspension

And the elephant in the room is: A 26mm axle can't be fitted into blind holes in a 24mm wide shallow channel without distorting the legs of the channel*. Note that in all other applications of pinpoint bearings at least one of the bearings is adjustable, usually on a screw thread. * the limit for t...
by Guy Rixon
Tue Feb 04, 2020 10:04 am
Forum: Starting in P4
Topic: Another newcomer's question re wagon suspension
Replies: 54
Views: 2403

Re: Another newcomer's question re wagon suspension

I don't "recommend" these dimensions, they are the dimensions that items should accord with. Unfortunately, I have checked the S4 Digest (and the EMGS manual!) but these fundamental dimensions are not specified. No wonder more than one manufacturer got it wrong. Of interest, the 2mm Scale...
by Guy Rixon
Mon Feb 03, 2020 8:58 pm
Forum: Guest Book
Topic: 3D printing track
Replies: 10
Views: 946

Re: 3D printing track

Document printing has evolved ... but it took its own sweet time about it. My research group got its first laser printer in 1987, at great cost. 32 years later, I finally managed to buy a home printer that's both affordable and works well, all my previous home printers having been expensive, or skip...
by Guy Rixon
Sat Feb 01, 2020 6:35 pm
Forum: Track and Turnouts
Topic: Track for battery/radio control?
Replies: 28
Views: 1383

Re: Track for battery/radio control?

... being able to print small sections of more complicated areas would be good, but then there's the issue of having access to a decent printer. Maybe someone like Modelu could provide a standard range of pre-printed sections? Rather than stocking pre-printed parts, I suggest having a library of st...
by Guy Rixon
Fri Jan 17, 2020 9:55 am
Forum: Coaches and NPCS
Topic: Bill Bedford Coach Bogies
Replies: 17
Views: 941

Re: Bill Bedford Coach Bogies

Secondly, one or two of the spring carriers appear to be a bit loose on the springing wire. Is there any reason that, having ascertained that the wires are of the correct diameter, I should not solder the carrier onto the wire? And similarly, becasue the wire on one side keeps trying to escape from...
by Guy Rixon
Tue Jan 14, 2020 10:42 pm
Forum: Starting in P4
Topic: Another newcomer's question re wagon suspension
Replies: 54
Views: 2403

Re: Another newcomer's question re wagon suspension

Waisted bearings also vary in depth, between manufacturers and between batches from the same manufacturer. Traditionally, Gibson bearings tend to be shallower and Markits/Romford bearings deeper. The BB axleguards sold through Eileens need the shallow bearings and those in the Mousa kits generally n...
by Guy Rixon
Thu Dec 19, 2019 12:02 pm
Forum: Trains: Model and Prototype
Topic: terrier advice
Replies: 9
Views: 1148

Re: terrier advice

I suggest waiting to see the new Rails model, or reviews of it, before choosing. There is some pre-release discussion of it on RMWeb. The Rails terriers missed the Christmas boats from China and are now expected in the new year.
by Guy Rixon
Wed Dec 18, 2019 12:21 pm
Forum: Wagons
Topic: Rails of Sheffield/Dapol ex-SECR box van 45374
Replies: 17
Views: 1639

Re: Rails of Sheffield/Dapol ex-SECR box van 45374

Thank you, Guy, for the helpful back history of these wagons. It is threatening to turn into a bigger project than I had anticipated (as usual :D ). Does anyone do the correct axleboxes and roof ventilators, please? I think I can sort out the handbrakes (famous last words). John Actual SECR P-type ...
by Guy Rixon
Mon Dec 16, 2019 2:02 pm
Forum: Wagons
Topic: Rails of Sheffield/Dapol ex-SECR box van 45374
Replies: 17
Views: 1639

Re: Rails of Sheffield/Dapol ex-SECR box van 45374

My grateful thanks for the replies. I am intending to backdate my example by applying some large "SR" transfers and removing the small 'SR' letters. It may be a case of painting them out. The other problem will be couplings. The model includes moulded on scale(?) hooks, but I do not know ...
by Guy Rixon
Thu Dec 12, 2019 7:13 pm
Forum: Wagons
Topic: Rails of Sheffield/Dapol ex-SECR box van 45374
Replies: 17
Views: 1639

Re: Rails of Sheffield/Dapol ex-SECR box van 45374

Concerning the SECR No.2 axleboxes: these were a Maunsell-era design of oil-lubricated box and were widely applied to SECR wagons with 3'1" wheels. The No.1 axlebox was from the same period and was used on wagons with 3'6" wheels, but precious few of those were made in Mr. Maunsell's time....
by Guy Rixon
Fri Dec 06, 2019 10:22 am
Forum: Wagons
Topic: Rails of Sheffield/Dapol ex-SECR box van 45374
Replies: 17
Views: 1639

Re: Rails of Sheffield/Dapol ex-SECR box van 45374

If replacing the axleguards in this model you'll need to salvage the SECR No.2 axleboxes as, so far as I know, nobody makes separate castings or prints for these. The model comes with AGW wheels in OO. I suggest just swapping the wheels for P4 and seeing if it runs adequately with fixed suspension. ...
by Guy Rixon
Fri Dec 06, 2019 10:12 am
Forum: Steam Locomotives
Topic: Jig for drilling crankpin hole
Replies: 72
Views: 3347

Re: Jig for drilling crankpin hole

I'm amused and a bit concerned that this appears to be a problem which is only soluble by the ownership of a decent drill press. Better not tell new members that until we got their membership free. More seriously, while I do admire the engineering skills many of you exhibit, I do think we might nee...
by Guy Rixon
Fri Nov 29, 2019 7:48 am
Forum: Wagons
Topic: GWR Mica Diag X2
Replies: 9
Views: 855

Re: GWR Mica Diag X2

I'll have to see which of those references I have John to see if I can make out the set-up on the wagon out-shopped in 1941. Looking at the modelling options it seems that there is a DC3 underframe in the Morgan Design list (for X5/X7) that may be ok for this wagon in its later condition. Thanks ag...
by Guy Rixon
Wed Nov 06, 2019 1:19 pm
Forum: Steam Locomotives
Topic: Brassmasters Blk5 45232
Replies: 70
Views: 6660

Re: Brassmasters Blk5 45232

Two things I've learned for tracking escaped parts: always double the search radius from your first guess, and use a UV torch. Small things bounce much further than people expect and shiny NS sometimes shows up brighter in short-wavelength light.
by Guy Rixon
Wed Nov 06, 2019 1:12 pm
Forum: Layouts and Operations
Topic: Glenmutchkin - Water Tanks
Replies: 169
Views: 46722

Re: Glenmutchkin - Turntable Troubles Reprise

Work out the circumference of your turntable and base the speed of rotation on the walking pace of the man pushing the turntable? Yes. I suspect that tangental speed was even slower than that, but walking pace is an upper limit for a model; anything faster looks wrong. I've seen films of full-size,...
by Guy Rixon
Sun Nov 03, 2019 12:22 pm
Forum: Wagons
Topic: Exactoscale wheels and axles.
Replies: 7
Views: 1138

Re: Exactoscale wheels and axles.

Amongst the Loctite retainers, it looks like 603 is better than 601 anyway. Advantages: - 50% bigger maximum bond-gap; - lower viscosity, making it easier to distribute in Exactoscale wheels; - high oil tolerance; - bonds imperfectly-cleaned surfaces; - good at bonding non-smooth surfaces. (informat...
by Guy Rixon
Fri Nov 01, 2019 12:08 pm
Forum: Wagons
Topic: Exactoscale wheels and axles.
Replies: 7
Views: 1138

Re: Exactoscale wheels and axles.

One advantage of the proper retainers is that they expand on hardening, centring the wheel on the axle.
by Guy Rixon
Sun Oct 27, 2019 9:26 am
Forum: Vehicle dynamics and trackholding
Topic: Better Running
Replies: 16
Views: 1588

Re: Better Running

You could also try and assess the smoothness of ride from the vibration spectrum. You'd need to know, or discover, the signature of a lurch in the frequency spectrum, and you'd need an on-board accelerometer to obtain the spectrum. Small accelerometers with wireless connection are available. I sugge...
by Guy Rixon
Sun Oct 27, 2019 9:18 am
Forum: Vehicle dynamics and trackholding
Topic: Better Running
Replies: 16
Views: 1588

Re: Better Running

The trackholding experiments published previously in MRJ all involved a vehicle free-wheeling down a plane through various types of pointwork and imperfect track. One hundred runs were done for each vehicle configuration and the number of successful runs tabulated. I see two improvements to that. On...
by Guy Rixon
Sat Oct 26, 2019 8:16 am
Forum: Track and Turnouts
Topic: Electric traverser
Replies: 3
Views: 635

Re: Electric traverser

Interesting. I need a wagon traverser for my eventual layout, and I'm wondering whether that above-ground kind would be better than the kind that moves in a pit. The sprung flaps at the entry and exit points might be a bit hard in 4mm scale. I can't see why Curzon Street would need a powered travers...

Go to advanced search