Search found 825 matches

by Russ Elliott
Wed Apr 12, 2017 9:36 pm
Forum: andrewnummelin
Topic: A railmotor or two - using the skills of others - etching
Replies: 13
Views: 5325

Re: A railmotor or two - using the skills of others - etching

Yes, sorry, by 'standard' (thickness) I meant common. And, as Howard himself noted, a thicker material can give decent half etch relief. A working drawing of the cross-section between wheel and cylinder centre will indicate what kind of thickness might be best.
by Russ Elliott
Wed Apr 12, 2017 12:34 pm
Forum: Chassis and Suspensions
Topic: Articulated beams?
Replies: 84
Views: 15703

Re: Articulated beams?

For a 2-axle chassis, this is an alternative configuration to the traditional fixed + rocking axle configuration. a-3jaa0p3u.jpg My impression from limited testing is that this alternative is more stable and requires less weight to stay on the track. I agree. It's like an MJT torsion-bar CCU, for e...
by Russ Elliott
Wed Apr 12, 2017 10:25 am
Forum: Chassis and Suspensions
Topic: Articulated beams?
Replies: 84
Views: 15703

Re: Articulated beams?

I wonder if you consider we have dealt with the issue of stability sufficiently? Probably not. In qualitative terms, lateral stability is easy to explain (we know a CofG towards the left improves lateral stability but gives a silly axle weight distribution, whilst one towards the triangle apex impr...
by Russ Elliott
Wed Apr 12, 2017 10:10 am
Forum: Couplings
Topic: Alex Jackson couplings and Brassmasters CCUs
Replies: 8
Views: 2960

Re: Alex Jackson couplings and Brassmasters CCUs

You've probably considered it already, but a possibility is the 'washer clearing the screw mounting' method:

aj-bogie-washer.png
aj-bogie-washer.png (5.05 KiB) Viewed 2853 times
by Russ Elliott
Tue Apr 11, 2017 9:47 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 73521

Re: Flexi Chassis an Appreciation

Which presumably complicates CSB systems even more if you want the axle boxes to move up and down correctly with the suspension and as simply as they do in this beam based example? Yes of course, and particularly for that example (which is why I commended it), but, in the general case, and especial...
by Russ Elliott
Tue Apr 11, 2017 7:16 pm
Forum: Track and Turnouts
Topic: Conductor Rail Supports Kit
Replies: 51
Views: 9746

Re: Conductor Rail Supports Kit

Guy - a Society CRS pack has 5 mouldings plus one etch, and will give 30 SR supports, so they are priced at 15p each. (The actual cost is about half that amount, but let's not re-open that old wound.)
by Russ Elliott
Tue Apr 11, 2017 3:21 pm
Forum: Chassis and Suspensions
Topic: Articulated beams?
Replies: 84
Views: 15703

Re: Articulated beams?

Julian Roberts wrote:Well Andrew I appreciate your patience here but I wonder how many other readers understand all this. I saw something like it in the Digest and soon glazed over.

I think the key here, Julian, is in the definition of 'digest' - understand or assimilate by a period of reflection.
by Russ Elliott
Tue Apr 11, 2017 2:50 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 73521

Re: Flexi Chassis an Appreciation

http://www.proto87.com/media/6%20wheel%20truck.jpg Here's how we can do a 6 wheel chassis. 6 wheel full equalization, then four point springing of each fulcrum to the frame. Four point sprung mounting over equalization gives 100% of the possible benefits of both equalization and springing. Yes, goo...
by Russ Elliott
Tue Apr 11, 2017 2:32 pm
Forum: Track and Turnouts
Topic: Re: Track and Wheel Standards
Replies: 35
Views: 9714

Re: Articulated beams?

andrew jukes wrote:What I’ve done is gauge at +0.2mm, set the check rails at 18.25mm and provide generous crossing flangeways.

Pragmatic and utterly sensible, Andrew (if a trifle devious!) A good example of where a little bending of the rules is good for a particular application.
by Russ Elliott
Tue Apr 11, 2017 2:13 pm
Forum: Track and Turnouts
Topic: P4 vs S4 - Pro's and con's
Replies: 164
Views: 35832

Re: P4 vs S4 - Pro's and con's

An S4 wheelset with a 17.87mm BB running through a turnout built to P4 standards i.e. using a check gauge of 18.15mm violates condition 2 of the Digest: BB (17.87mm) + EF (0.38mm) = 18.25mm i.e. >18.15mm, so the wheelset is likely to conflict with the crossing nose. Hmmm. 'Conflict' with the crossi...
by Russ Elliott
Tue Apr 11, 2017 10:45 am
Forum: Track and Turnouts
Topic: Conductor Rail Supports Kit
Replies: 51
Views: 9746

Re: Conductor Rail Supports Kit

Hi Barry Technology has advanced, and a 3D SR support seems possible, but I'm not convinced it would work out all that much cheaper than the current Society offering. Btw, a point to note is that the etched ear holds the edges of the foot of the conductor rail, thus providing a reasonable measure of...
by Russ Elliott
Sun Apr 02, 2017 9:45 am
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 73521

Re: Flexi Chassis an Appreciation

As per my earlier comments, I disagree absolutely that a model equalizing bar should ever be springy as well. I certainly didn't submit that concept in my contribution to the digest. If you want to compromise two suspension methods by muddling them up in one component, then you, not I, have the res...
by Russ Elliott
Sat Apr 01, 2017 11:45 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 73521

Re: Flexi Chassis an Appreciation

proto87stores wrote:For our purposes equalization means what it says. It automatically adjusts the carried weight per wheel equally under a common fulcrum in all track conditions.


Nonsense.

springy-equaliser2.png
springy-equaliser2.png (5.62 KiB) Viewed 4372 times
by Russ Elliott
Sat Apr 01, 2017 4:02 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 73521

Re: Flexi Chassis an Appreciation

I often think 'equalisation' is a much misunderstood (and misused) term:

nyc254s.jpg


In model terms, this is quite simply:

springy-equaliser.png
springy-equaliser.png (1.85 KiB) Viewed 4430 times
by Russ Elliott
Sat Apr 01, 2017 3:20 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 73521

Re: Flexi Chassis an Appreciation

How strong are Brassmasters ones? Subjectively they feel quite strong. Is the idea of them to rest on the end stop like Gibson ones (but with more downward force perhaps) or to ride in midpoint like a CSB? The strength of the Brassmasters spring is approx 0.7N/mm. See http://www.clag.org.uk/brassma...
by Russ Elliott
Sat Apr 01, 2017 2:44 pm
Forum: Painting and Weathering
Topic: GWR Loco Green Pre-1928
Replies: 5
Views: 1932

Re: GWR Loco Green Pre-1928

http://www.gwr.org.uk/liverieslococolour.html

I have been adding some currently-available paints to that page where there seems to be a consensus that they are a good match.
by Russ Elliott
Sat Apr 01, 2017 12:14 pm
Forum: andrewnummelin
Topic: A railmotor or two - using the skills of others - etching
Replies: 13
Views: 5325

Re: A railmotor or two - using the skills of others - etching

I doubt you will have the space for proper forked joints, assuming a standard 12 thou nickel etch.
by Russ Elliott
Sat Apr 01, 2017 11:27 am
Forum: Armchair Modeller
Topic: Going For Bussed - Neversay Railbuses and Railcars
Replies: 42
Views: 10936

Re: Going For Bussed - Neversay Railbuses and Railcars

OK, but the shafts are not positively located like normal gearboxes - they can rock quite a bit. My railcars could flop over to one side or other if I didn't have bearings on the axles to hold them in a specific alignment. Similarly, the drive shaft will have to be held in a fixed position to allow...
by Russ Elliott
Sat Apr 01, 2017 11:04 am
Forum: Andy W
Topic: Early GWR livery
Replies: 5
Views: 1704

Re: Early GWR livery

martin goodall wrote:The inner line was still there inside the panels when the all "chocolate" livery was introduced in 1908, but nobody seems to know what (lighter) colour it was in that case. Any guesses?

'gold' (in GWR parlance, but translates to pale straw in more modern colour terms)
by Russ Elliott
Sat Apr 01, 2017 10:42 am
Forum: Chassis and Suspensions
Topic: Articulated beams?
Replies: 84
Views: 15703

Re: Articulated beams?

And if doing it my way to give extra secure trackholding possibly at the expense of some haulage power, you would move them out a little further, to say a 1/4 point. But there comes a stage where 'moving them out a little further' will impair trackholding of the centre axle, so I can't see much poi...
by Russ Elliott
Sat Apr 01, 2017 9:28 am
Forum: Painting and Weathering
Topic: GWR Loco Green Pre-1928
Replies: 5
Views: 1932

Re: GWR Loco Green Pre-1928

It's difficult to judge from on-screen paint swabs, but the XF-26 Deep Green looks a better match for the pre-1928 colour. (And some people might not regards even that as dark enough.)

https://www.toyco.co.nz/products/550/ta ... 10ml-1.jpg
by Russ Elliott
Tue Feb 07, 2017 12:35 pm
Forum: Starting in P4
Topic: Making a Start - The Peak District Midland / Monsal Dale pre 1903
Replies: 1139
Views: 174987

Re: Making a Start - The Peak District Midland pre 1905

Do you have a method of adding weight (lead) to the loco such that you know where to add in order to achieve a uniform distribution? If the pivot point is over the central wheel, I suppose you could rig up a balance and add weight by trial and error until it sits horizontal? I just felt sure there ...
by Russ Elliott
Tue Feb 07, 2017 11:51 am
Forum: Chassis and Suspensions
Topic: attaching a compensation beam
Replies: 9
Views: 2897

Re: attaching a compensation beam

garethashenden wrote:The compensation works very well with this setup.

But only if the length of the bearing is small. Axles don't like running in misaligned bearings.
by Russ Elliott
Tue Feb 07, 2017 11:24 am
Forum: Starting in P4
Topic: Making a Start - The Peak District Midland / Monsal Dale pre 1903
Replies: 1139
Views: 174987

Re: Making a Start - The Peak District Midland pre 1905

However, the auto calculate function on the spread sheet produces what is effectively the shortest practical plot booooo.... Tim - I'm Mr Longer Spans Are Better, because longer spans can use thicker wire, and thicker wire tends to be easier to get straight. In a CSB chassis, it is desirable to use...
by Russ Elliott
Sun Jan 29, 2017 12:42 pm
Forum: Exhibitions
Topic: Lincoln Model Railway Show 2017
Replies: 2
Views: 1211

Re: Lincoln Model Railway Show 2017

Decent size trees!

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