Nicks workshop mutterings

Various railway orientated modelling projects in my new workshop/railway room.

Poppy’s loco building box

Following a discussion at the St Albans show I commissioned a 3mm scale version of their new loco building jig. It is made from laser cut plywood and comes complete with 1/8″ axles turned down at the ends to take coupling rods.

I am now trying it out to build a chassis for a 0-4-2 GWR 517 class tank. This is the 3 mm society kit reduced down from Malcolm Mitchell’s 4/7 mm kit.

The instructions suggest using the supplied silicon tube to hold the chassis central in the box but I was worried about keeping it square. The first axle is inserted in a central hole and the second is fitted through a slot and the wheelbase is held by using the coupling rods. I have threaded top hat bearings with the flange towards the centre of the box onto the rod first. When the side frames complete with bearings are threaded on they can be pushed tight up to the other bearings and this keeps it all square. 

I am building the chassis to 14.2 mm gauge but not compensated as there isn’t enough room to get rhe beam around the gearbox. If building a chassis with hornblocks this will be ideal to get them in the correct position before soldering up. 

The chassis spacers can be tack soldered to one of the side frames and then the whole lot is set up in the jig  before finally soldering up the spacers.

   
 
Overall I think that ,compared with other more complicated and expensive jigs ,at £25 this is good value. My only worry is that the central, fixed axle hole will wear in time. I may fit brass bearings to this hole to stop the wood wearing. 

Advertisements

Single Post Navigation

One thought on “Poppy’s loco building box

  1. Reblogged this on sed30's Blog and commented:
    I’ve got one too

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

sed30's Blog

Railways & other things

3mm Society

Various railway orientated modelling projects in my new workshop/railway room.

feather oak

Sharing our passion for free range specialist poultry, rare breed sheep and foraged loveliness

highland miscellany

My modelling musings on Portchullin, Glenmutchkins and anything else that takes my fancy.

Phil's Workbench

Various railway orientated modelling projects in my new workshop/railway room.

Kyle of Sutherland

The epic struggle to build a model railway exhibition layout at 4mm to the foot

%d bloggers like this: