Scalefour Forum

Great video David. Not just a masterclass on the RSU, but a masterclass on how to do a great presentation as well! I have one of the original Bernard Weller units from the early 90s - I use it all the time, but I’ve picked up a lot of new ideas here especially with alternative support for the work a...

Wonderful stuff Guy - so many different skills at work! Many years ago I made some printed circuit boards (PCBs) by scanning and laser printing onto silicone release paper, then laminating with a domestic iron onto copper-clad sheet before etching with ferric chloride. It worked well for PCBs but wa...

Tell us the details Doug, I’m sure the Sydney group will join you!

David Murrell

Thanks very much Tony, much appreciated. As usual for this thread, an elegant solution!
I didn’t realise you were using a DPDT momentary to initiate the 555 reset but all now makes sense. Having the component values for the control circuit is very helpful.

Regards,
David

Thanks Keith, that does seem extremely good value.
I was interested in the implementation of the 555 timer circuit and reset function via relay 11.

Regards,
David

Do you have a circuit diagram for your relay card Tony?

David Murrell

That’s very interesting Ted, and most helpful.
Are you adding much extra weight to these coaches? And what do you regard as the ideal final weight using this approach?

David Murrell

Here’s a start:
https://m.wikihow.com/Make-Black

Maybe a demo at Scaleforum, just needs a few tubes of acrylic - and a willing 4 year old.

David

https://www.modelu3d.co.uk/product/2121/

Look under infrastructure!

David

I’ve used this system too, building about two dozen wagons more than 30 years ago using ordinary rubber band strips and MJT W irons. It does seem to work fairly reliably providing the same care is taken to ensure the units are aligned carefuly and secured squarely, as applies to any system. At the t...

Polyimide film, such as Kapton tape, is widely used for both insulation and thermal protection in PCB production, especially in the aerospace industry. It was even used to plug a hole in the International Space Station! It is available in various widths and although a lot more expensive than PVC ins...

An interesting topic! Colour rendering in film emulsions and it's variation is a complex subject, made more difficult by our own colour perception. Kodachrome was a fairly consistent emulsion by the 1970s but even so there was variation between batches - large users for commercial purpose (such as N...

I agree Ralph, I was nervous about the ongoing delay too but the pre-release offer was too good to ignore! It was also important for a succesful release that it was truly reliable. I had been following their story since the original Emblaser was released and it sounded like the development team were...

Very encouraging results, Ralph. I took delivery of the Emblaser 2 about a year ago and was quite impressed with my initial experience, using MDF, despite the clunky Laserweb package. I have downloaded Lightburn but due to office space contraints have yet to get very far with it, however it looks to...

+1

Just brilliant Jeremy, superb engineering.
For me, this is what our side of the hobby is all about!

David

Nice work Craig, hope you can bring them along to the next group meeting in February. Doug, regarding sprung buffers: My clear preference too is to have them sprung if possible but it's not always the case of course, especially with the self-contained variety. I suspect that we can get away with hav...

Doug, BCS Auto paints in Sydney can supply automotive paint in smaller quantities and can ship 35mL bottles (for small repairs) by ordinary post, larger quantities (500mL or more) by road. They have formulae going back to the 1950s and claim to be able to match anything. You can also arrange to coll...

Very eloquently said, Russ.

I too am glad to see you back!

David

Following on from this, has anyone any long term experience of what these chairs are like once they are installed? Are we finding that they have a finite life? If so, and the problem is also endemic to current production, then track built now could have a limited life span. Philip, I have recently ...

A great article, Mark - and much needed. It nicely complements Howard Bolton's recent articles.
As usual, the Snooze is well worth the wait...

David Murrell

Jim,

I think beauty is in eyes of the beholder! I find the Grange well-proportioned and balanced, more so than either a Manor or Hall. I prefer Churchward & Collett tenders to those that followed. And I find Dukes and Dukedogs the essence of graceful perfection...

Each to their own!

David

Craig, it looks like the giant Echidna is lying in wait for the next barrow-man to come by.

Very nice work, both of you!

This may or may not help. A small gasworks in 1939: stourport_gas_works_1939.jpg usage required attribution: © http://www.britainfromabove.org.uk/image/epw061731 Martin. Very interesting photo (and link) Martin! As a kid in the mid 1960s, we lived a short distance from Stourport. I remember the pow...

I would like to add my thanks to Terry and his team for such an excellent weekend - I was enthralled right up to the final minutes, when I reluctantly dragged myself away from a fascinating discussion with Steve Duckworth on the art and science of chassis construction. Congratulations to all, especi...

If you do make use of car parking space in the hospital, please make sure that you get one of our permits, otherwise you may get clamped or fined. :( If the available space is full it may be easier to find a spot on local roads but please do not block entrances. So where do we get these permits fro...