Search found 36 matches

by zebedeesknees
Fri Aug 30, 2019 11:03 am
Forum: Guest Book
Topic: Chassis kits for CSB
Replies: 26
Views: 1858

Re: Chassis kits for CSB

Will and Dave should call their 2-8-0s 'Bumble Bees'... some blinkered theorists say that they can't fly!
by zebedeesknees
Fri Aug 09, 2019 2:08 pm
Forum: Chassis and Suspensions
Topic: Chassis kits for CSB
Replies: 37
Views: 2499

Re: Chassis kits for CSB

Dave Bradwell wrote: I just questioned whether the design was optimum. Ahhh, optimum for what? Current collection, weight distribution, haulage, ease of assembly/adjustment, or something else? Perhaps it just needs another csb for the pickups to get the downward pressures all the same - or simple c...
by zebedeesknees
Tue Aug 06, 2019 12:04 pm
Forum: Track and Turnouts
Topic: Modern Era Concrete Track
Replies: 26
Views: 927

Re: Modern Era Concrete Track

by Alan Turner » Tue Aug 06, 2019 9:51 am Simon_S wrote: Hi Nick, You might also consider Colin Craig's modern track products. Simon Interesting, all I get with that site is a blue page with a black square in the middle? Me too, solved by installing latest version of Adobe Flash Player. It's a pain...
by zebedeesknees
Mon Jul 01, 2019 12:53 pm
Forum: Guest Book
Topic: A possible new P4 wheel source
Replies: 6
Views: 1297

Re: A possible new P4 wheel source

I can confirm that P87 wheels work fine with S4 track, and therefore probably with P4. I have been using wheels from the now defunct 'Railflyer' source, which look very similar, for some time. The insulating bushes came for 2mm or 1mm axles, and I have used both. Their 40" diameter wheel in P87...
by zebedeesknees
Tue Jun 18, 2019 2:50 pm
Forum: Tools and Techniques
Topic: Track cleaning
Replies: 62
Views: 3617

Re: Track cleaning

Full springing of all stock really helps; battery powered traction solves the problem.
by zebedeesknees
Mon Jul 23, 2018 1:31 pm
Forum: Chassis and Suspensions
Topic: Converting Tender Chassis
Replies: 7
Views: 1627

8 axle non-bogie vehicles with CSBs

It would appear that my reasons for going to springy beams on the Finney 8-wheel tender have not been understood by some; Keith is right, the idea has been available to interested modellers for some time. In fact, one of my first P4 locos, an S&D 7F, had this feature and that was just after I jo...
by zebedeesknees
Sat Jul 21, 2018 2:34 pm
Forum: Guy Rixon
Topic: Drive components for electric locos and EMUs
Replies: 11
Views: 3565

Re: Drive components for electric locos and EMUs

Indeed Guy, and I have an untried idea for neggy rail pickups - a brass drawing pin. The dome shape should work smoothly on ramps, and it can be larger than proto to make sure it stays on the rail as it won't be visible. The pin part could ride in a piece of brass tube with the conductor wire fitted...
by zebedeesknees
Sat Jul 21, 2018 2:25 pm
Forum: Chassis and Suspensions
Topic: Converting Tender Chassis
Replies: 7
Views: 1627

Re: Converting Tender Chassis

The Lanarkshire tender chassis has a slightly different axle spacing; between 1st and 2nd and 3rd and 4th are the same as the A3/4 tenders, but the 2nd - 3rd spacing is 1mm less on the WD tender. Get-away-with-able... The Brassmasters Easi-chas conversion looks like a better bet if you don't want to...
by zebedeesknees
Thu Jul 19, 2018 2:51 pm
Forum: Guy Rixon
Topic: Drive components for electric locos and EMUs
Replies: 11
Views: 3565

Re: Drive components for electric locos and EMUs

One other thought: would it be worth actually electrifying the conductor rails and picking up from those? Guy, I have tried this with some success... but. The main problem is getting the pickup shoes to behave. On most of the real things, the shoe beams are attached at each end to the wheel bearing...
by zebedeesknees
Sat Feb 17, 2018 4:58 pm
Forum: Tools and Techniques
Topic: Resistance Soldering
Replies: 96
Views: 16531

Re: Resistance Soldering

Not for the faint-hearted, but a pencil can be used for very fine work. 2B or preferably higher. I take about 6-10mm of the wood off the non-pointy end, and wrap the 'lead' - which isn't of course, it's a mixture of graphite and clay, the higher the B the less clay - with foil, and clip over that. T...
by zebedeesknees
Tue Jan 02, 2018 2:59 pm
Forum: Trains: Model and Prototype
Topic: What back to back setting do you use?
Replies: 195
Views: 32886

Re: What back to back setting do you use?

We call ourselves scale modellers, right? A bit of the dreaded mathematics:- The real b-b according to the drawings from North British in one of my O.S.Nock books is 4' 5 and 5/8". Or 53.625" for easier calculation. Multiply by 25.4 (Millimeters per inch) equals 1362.075mm. Divide by our s...
by zebedeesknees
Wed Jun 21, 2017 8:01 am
Forum: Exhibitions
Topic: Scalefour Society AGM, 17 June 2017
Replies: 29
Views: 6935

Re: Scalefour Society AGM, 17 June 2017

I had hoped to get there this year, but after the drive back from Plymouth to London the day before taking 8½ hours rather than the usual 4½, in that heat with a malfunctioning air-con, there was no way I could surface in time! As it turned out, one of the reasons why I felt so shattered was that I...
by zebedeesknees
Sat Jun 17, 2017 7:13 pm
Forum: Exhibitions
Topic: Scalefour Society AGM, 17 June 2017
Replies: 29
Views: 6935

Re: Scalefour Society AGM, 17 June 2017

I had hoped to get there this year, but after the drive back from Plymouth to London the day before taking 8½ hours rather than the usual 4½, in that heat with a malfunctioning air-con, there was no way I could surface in time! Stationary on the fast lanes of the A38, M5, M4, M25, and the slow lane ...
by zebedeesknees
Tue May 09, 2017 7:02 pm
Forum: Trains: Model and Prototype
Topic: Thoughts on Motors
Replies: 74
Views: 16953

Re: Thoughts on Motors

I keep looking at RC, and there is some interesting stuff out there, but until there is an alternative to LiPo batteries I won't try it. If you look seriously at the safety precautions advised by level headed commentators you wont try it, If only because melting those expensively created locos is b...
by zebedeesknees
Mon Apr 17, 2017 7:18 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 61003

Re: Flexi Chassis an Appreciation

I don't think there is any problem with our understanding of the basis physics, it just that there are always a lots of other factors which can have an influence on the final result as well. Foe instance, I remember Don Roland telling me the problem's they got onto trying to establish the true weig...
by zebedeesknees
Thu Apr 13, 2017 4:18 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 61003

Re: Flexi Chassis an Appreciation

Zebedeesknees I was not trying to persuade anyone to any particular method. Rather, I think Lindsay's gas light analogy is not wholly apposite, and that a closer analogy might be that while gas central heating might suit most houses best, electric oil and even solid fuels still can be equally appro...
by zebedeesknees
Wed Apr 12, 2017 6:20 pm
Forum: Chassis and Suspensions
Topic: COG and suspension calculation 4-6-0
Replies: 22
Views: 2934

Re: COG and suspension calculation 4-6-0

One can receive from the CLAG website on the subject the impression that the positions of the fixed anchors and the center of mass, or gravity if you must, is of necessity of a precision that is in fact only desirable. A difference of a couple of mm in the placing of the inner anchors, or 10mm in th...
by zebedeesknees
Wed Apr 12, 2017 6:05 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 61003

Re: Flexi Chassis an Appreciation

A few points come to my mind here. Modellers are generally conservative, and the thought of going away from at least one fixed axle, and the ease of driving same, replaced with the complication of a floating motor or gearbox and the need for torque reaction control in a fully sprung system is clearl...
by zebedeesknees
Fri Feb 10, 2017 6:16 pm
Forum: Guest Book
Topic: Flexi Chassis an Appreciation
Replies: 467
Views: 61003

Re: Flexi Chassis an Appreciation

After 15 or 20 years of explaining to you why springing is superior to 'equalisation' you still don't get the point, and I suspect that most people that have tried to help you have just given up. True here.. I have just tested the drawbar pull of a rigid Bachmann 24 with a sprung one. Rigid - 14% o...
by zebedeesknees
Thu Jan 12, 2017 6:24 pm
Forum: John Donnelly
Topic: A sprung Class 24 or an exercise in ignorance and persistence...
Replies: 57
Views: 9332

Re: A sprung Class 24 or an exercise in ignorance and persistence...

With regard to soldering nuts to sheet brass, I keep some chemically blackened screws in my BA boxes for the purpose. Solder is most reluctant to adhere to blackened metal, and this saves the sometimes messy result from using grease.
by zebedeesknees
Fri Jan 06, 2017 3:28 pm
Forum: Control Concepts
Topic: Induction charging
Replies: 7
Views: 1814

Re: Induction charging

On LiPo batteries.. The ones on eBay, Gearbest, etc., made in China for quadcopters and drones have a very small internal pcb which controls the charge and discharge rates. A single cell has a nominal 3.7v, and is quickly destroyed if the voltage on the bare cell is pushed to over 4.2v, or discharge...
by zebedeesknees
Thu Jan 05, 2017 11:47 pm
Forum: Control Concepts
Topic: Induction charging
Replies: 7
Views: 1814

Re: Induction charging

There are a lot of details.. off the top of my head right now.. I searched 'induction charger' on eBay and the like, and found pairs with small enough coils to fit beween the rails, and small pcbs. The one in the picture is the transmitter coil and circuit board, to which I soldered a Bridge rectifi...
by zebedeesknees
Thu Jan 05, 2017 10:13 pm
Forum: Chassis and Suspensions
Topic: How tight should a pair of wheels be to the B2B gauge?
Replies: 4
Views: 1474

Re: How tight should a pair of wheels be to the B2B gauge?

If you work your way round the circuference of almost any pair of wheels, it will likely be the case that there will be spots that are tighter than others. This is often only a slight variation, and with feel the back to back can be set to average out the error. If in any place the gauge can be held...
by zebedeesknees
Thu Jan 05, 2017 8:30 pm
Forum: Control Concepts
Topic: Induction charging
Replies: 7
Views: 1814

Induction charging

Successful charging of an on-board LiPo battery can be done this way:-
InductionTxRx02.jpg
by zebedeesknees
Fri Apr 15, 2016 7:02 pm
Forum: Control Concepts
Topic: Radio control - a bit sideways
Replies: 37
Views: 6917

Re: Radio control - a bit sideways

Perhaps I am posting this electronics stuff to the wrong forum.. I don't agree that 'the whole point' of radio control is just to eliminate wiring and pickups. The holy grail would be to be able to have no traction wiring or pickups, shorts between all wheels, and track circuits like the real thing,...

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