Ancient Crampton Well Tank Loco

[bertiedog]

if you build a Crampton, bear in mind a couple of points, the footplate is as wide as the splashers inside, and in 00 this is greatly reduced, so the splasher tops must be wider than scale, and where does the Worm gear wheel go? It is in the middle of the footplate floor, as the axle is just below it.

 

Not many solutions to the gear wheel, it can be done with a spur gear on the axle up against the wheel, and a countershaft running through the boiler, with a worm gear on it inside the boiler.

 

Mike Sharman arranged some of his this way.

(Or have a tender drive........)

 

Pulling power is absolutely no problem, the tenders weight is carried on the drawbar, only the tenders rear wheels are taking weight, the front two float on a bogie. Pack the tender with lead and the loco will pull like blazes.

 

Another solution to the gear problem is a small worm gear on the axle, say 10:1, and put a second stage spur gear on the motor in the boiler.

 

Stephen

[bertiedog]

Resuming the construction again, after some 009, mainly to finish milling parts for the chassis and boiler, which still need work to get everything to fit better, as the space is very tight. Most detailing parts are all done, but the basis is the boiler, and how it is to be assembled so that it can be got apart again for painting.

Stephen

[rockershovel]

I must say, that 2-2-4T with the Howdah on the back looks quite splendid. Really needs David Niven in a top hat, for the full effect..

[bertiedog]

Nuisance problem, on an 009 chassis as well, the ballraces are 1.mm and 2mm, and stainless steel shafting bought from HPC gears at nominal size, ground finish, will not fit Chinese ball races.

The Chinese are the correct size, by BS test gauges, but the shaft is nearly thou over size, and needs abrasive reduction to get it to fit into the miniature races.

The Chinese motors have a dead 2mm shaft or dead 1,5mm and the races just about fit, making changing to ball races very easy. The cost is low, these Hong Kong races are cheap, but well made!

At least it is relatively easy to reduce the shaft size by lapping with fine abrasive, and I can make the fit I need, but it takes a bit more time.

The intention is a ball raced motor, and driven axle as well so aiding smooth running. With ball races a heavier flywheel can be fitted, as ordinary bronze bearings wear out quickly with them, and go noisy.

Stephen

[£1.38]

Hoping this topic has not died.

 

I found a photo of a German imitation a few days ago

 

 

[bertiedog]

No not died, that's very interesting, the German loco. The Loco is up an running but not complete as yet, there are a lot of fine details to add, along with wood cladding for the boiler. The cab floor has caused a few problems trying to estimate the floor level, but seems about right now. I am hoping the boiler was not one of the oval type Crampton sometimes used.

 

Stephen

[£1.38]

Any photos?

[£1.38]

Found this recently as well...

 

 

Built by Bridges Adams for a line in Italy - not a Crampton, but a close relative to 'Ariel's Girdle'. Some of the detail may be useful. It looks like it is an artist's work, rather than an engineering drawing. Nevertheless, it looks fairly convincing, as if the artist had access to a good photo or drawings.

[Killian keane]

Hoping this topic has not died.

 

I found a photo of a German imitation a few days ago

 

German-Crampton-Hohenzoller.jpg

Cab looks very Isle of man esque Edited June 18, 2017 by Killian keane