Search found 24 matches

by best33
Tue Feb 11, 2020 5:44 pm
Forum: Tools and Techniques
Topic: Finney 3500 Gallon Tender Brakes
Replies: 13
Views: 656

Re: Finney 3500 Gallon Tender Brakes

I drew up some spring carriers and reaction blocks for the tenders based on the Bill Bedford principle. The middle carrier accommodates a top hat bearing. All I had to was to modify the tender frames so that the rigid axle hole was elongated. The other modification was to remove 0.3mm off the length...
by best33
Mon Feb 10, 2020 5:49 pm
Forum: Tools and Techniques
Topic: Finney 3500 Gallon Tender Brakes
Replies: 13
Views: 656

Re: Finney 3500 Gallon Tender Brakes

Here are some pictures of a dry run fitting of the brakes.

You can also the end of a spring in the last picture but that is another story!!

Mark
by best33
Mon Feb 10, 2020 1:05 pm
Forum: Tools and Techniques
Topic: Finney 3500 Gallon Tender Brakes
Replies: 13
Views: 656

Re: Finney 3500 Gallon Tender Brakes

It is useful to build them so they can be moved for final adjustments but to make them so they can operate; No Thanks!!!!!

Mark
by best33
Mon Feb 10, 2020 6:40 am
Forum: Tools and Techniques
Topic: Finney 3500 Gallon Tender Brakes
Replies: 13
Views: 656

Re: Finney 3500 Gallon Tender Brakes

The tube basically sets the distance from the frames to the brake hanger so it will different for a different kit or prototype. In this instance I think it was 0.8mm. I first used this 20 years ago. I built a 28xx and made the brakes removable by not soldering the hangers to the pivot. Since they we...
by best33
Sun Feb 09, 2020 2:48 pm
Forum: Tools and Techniques
Topic: Finney 3500 Gallon Tender Brakes
Replies: 13
Views: 656

Re: Finney 3500 Gallon Tender Brakes

Yes I have used this method before. To stop the bits firing off across the room I used to push a piece of wire inside the tube to trap them!

Here are some more pictures showing the completed brakes and one temporarily balanced on its spigot.

Mark
by best33
Sun Feb 09, 2020 8:53 am
Forum: Tools and Techniques
Topic: Finney 3500 Gallon Tender Brakes
Replies: 13
Views: 656

Finney 3500 Gallon Tender Brakes

I have three 3500 gallon tenders on the go at the moment and I have built them so the wheels can be fully removable for painting and other maintenance. The kit is designed for the wheels to be fitted permanently. In order to make the brakes removable I have fitted a small spigot in the frames where ...
by best33
Mon Jan 13, 2020 6:04 pm
Forum: Tools and Techniques
Topic: Rolling a roof
Replies: 4
Views: 387

Re: Rolling a roof

Form the large radius first.

Mark
by best33
Mon Jan 13, 2020 12:48 pm
Forum: Tools and Techniques
Topic: Rolling a roof
Replies: 4
Views: 387

Re: Rolling a roof

I did the High Level Fowler Diesel last Summer which has a similar issue with a tight radius on the edge of the roof. I used a good quality vice with parallel smooth jaws and rested a piece of appropriate diameter bar on a piece of shim to bring the top of the bar flush with the top of the vice I th...
by best33
Tue Dec 03, 2019 12:52 pm
Forum: Steam Locomotives
Topic: Jig for drilling crankpin hole
Replies: 72
Views: 3308

Re: Jig for drilling crankpin hole

The important point with this is that all the holes have to be the in the same radial position relative to the axle and at the same angle (ideally parallel to the axle). If you make a jig with an error, but it results in all the drilled holes being the same on every wheel then it should work OK. The...
by best33
Wed Nov 20, 2019 5:23 pm
Forum: Steam Locomotives
Topic: 45xx Kit
Replies: 10
Views: 868

Re: 45xx Kit

Hi Is there any difference between the Churchward Models and Malcolm Mitchell 45xx kit? It is the same kit. Originally sold as Churchward models and then sold through Modelex. When the business was sold to Pete Waterman David Geen was appointed as distributor of the 4mm kits. He added a 4575 to the...
by best33
Wed Nov 20, 2019 3:50 pm
Forum: Steam Locomotives
Topic: Brassmasters Duchess test build
Replies: 30
Views: 2972

Re: Brassmasters Duchess test build

The photo below shows the way I do it. Or rather it shows the end result :) More information on the way its done would be very useful. Regards The slot is put in the axle on the outer edge around 2mm deep using a milling machine but it could be done with a saw it just won’t look as tidy. The wheels...
by best33
Wed Nov 20, 2019 2:53 pm
Forum: Steam Locomotives
Topic: Brassmasters Duchess test build
Replies: 30
Views: 2972

Re: Brassmasters Duchess test build

And not what I intended either but a perfectly good approach. However, given a hollow axle, rather than cutting an angled slot, could you not drill an angled hole starting in the hole in the middle of the axle? I'm only persisting with this because I usually find that if you want to drill a hole th...
by best33
Tue Nov 19, 2019 12:59 pm
Forum: Steam Locomotives
Topic: Brassmasters Duchess test build
Replies: 30
Views: 2972

Re: Brassmasters Duchess test build

Easiest way to pin an axles is to cut a slot across the end of the axle at a slight angle so it is deeper at one side and hardly goes down the other side at all. Pop on the axle as usual. Then use the slot to drill into the wheel hub. Put in a wire pin, fill up slot and clean off. Don Roland taught...
by best33
Wed Oct 30, 2019 12:50 pm
Forum: Steam Locomotives
Topic: Ultrascale wheel sets
Replies: 5
Views: 675

Re: Ultrascale wheel sets

You want 1/8th of an inch axles and as other people have stated the ends are turned down to a smaller diameter to accommodate the smaller boss on the wheel. The dimple is a small turning centre on the axle for wheel turning and can be found on most Great Western loco's. Only the Kings had hollow axl...
by best33
Thu Sep 19, 2019 12:06 pm
Forum: Steam Locomotives
Topic: Any Wheel and size!
Replies: 79
Views: 12441

Re: Any Wheel and size!

Have you thought of bonding the wheels into the tyres using additional printer resin and solidifying it with a UV lamp? In doing so you can use the machining marks on the inside of the tyre to lock the printed insert in place.

Mark Humphrys
by best33
Tue Feb 20, 2018 12:31 pm
Forum: Other Workshop Practice
Topic: Springs for axle jigs?
Replies: 10
Views: 2049

Re: Springs for axle jigs?

Why not make your own? Get a piece of 0.5mm brass rod and wind a spring around a suitable diameter piece of bar?

You don't need a massive force to hold the horn block in place and I found some of the commercial versions were a bit heavy.

Mark Humphrys
by best33
Wed May 17, 2017 12:00 pm
Forum: Bristol
Topic: Bristol Group workshop night
Replies: 10
Views: 4845

Re: Bristol Group workshop night

steamraiser wrote:A kitchen sink and a Land Rover what more do you need?

Gordon A


A Spell checker for Tim!

Mark Humphrys
by best33
Tue Feb 23, 2016 8:49 pm
Forum: Product Information
Topic: mark humphreys shorting strips
Replies: 4
Views: 1331

Re: mark humphreys shorting strips

These are available from stores. There is an article in a forthcoming MRJ. There is no reason why they can't be used for Gibson wheels but just won't be able to drop completely behind the wheel.

Regards

Mark Humphrys
by best33
Tue Feb 16, 2016 7:47 pm
Forum: Steam Locomotives
Topic: Kings
Replies: 12
Views: 3027

Re: Kings

The drive shaft between the loco and tender is 2mm diameter once the key has been dressed back. I may reduce it slightly more but not for aesthetic reasons. The location under the footplate is very discrete and pretty well impossible to see from normal viewing angles.

Regards

Mark Humphrys
by best33
Wed Apr 08, 2015 6:19 am
Forum: Steam Locomotives
Topic: Shorting Strips for GWR Ultrascale wheels
Replies: 11
Views: 4355

Re: Shorting Strips for GWR Ultrascale wheels

The full range of these shorting strip are available from stores. If there is sufficient interest I will look at expanding to cover more wheels in the Ultrascale range.

Mark Humphrys
by best33
Mon Nov 24, 2014 7:07 pm
Forum: Steam Locomotives
Topic: Shorting Strips for GWR Ultrascale wheels
Replies: 11
Views: 4355

Re: Shorting Strips for GWR Ultrascale wheels

Tim V wrote:How about some pictures Mark?


I'll bring them down tomorrow night for the BS4 group to peruse!

Regards

Mark
by best33
Mon Nov 24, 2014 1:04 pm
Forum: Steam Locomotives
Topic: Shorting Strips for GWR Ultrascale wheels
Replies: 11
Views: 4355

Re: Shorting Strips for GWR Ultrascale wheels

These are soldered to the back of the tyre using a half etched step, so they still make the tyre wider by the thickness of the half etch over a radius of around 0.5mm. A GW Models back to back gauge should make it possible to accomodate this when setting the wheels to gauge. The driving force behind...
by best33
Fri Nov 21, 2014 1:04 pm
Forum: Steam Locomotives
Topic: Shorting Strips for GWR Ultrascale wheels
Replies: 11
Views: 4355

Re: Shorting Strips for GWR Ultrascale wheels

Thanks for the comment. The critical area is the back of the tyre. If the Gibson tyre bores are the same diameter as the Ultrascale versions then they should work. I haven't got any Gibson wheels to check, but I guess I could list the diameters of each shorting strip over the diameter that drops int...
by best33
Thu Nov 20, 2014 1:11 pm
Forum: Steam Locomotives
Topic: Shorting Strips for GWR Ultrascale wheels
Replies: 11
Views: 4355

Shorting Strips for GWR Ultrascale wheels

I have on Ebay at the moment a selection of newly designed shorting strips for Ultrascale Wheels covering GWR tender wheels and a range of GWR driving wheels. These differ from normal shorting strips in that they form a complete disc that sits behind the wheel with spokes that line up with the spoke...

Go to advanced search