Tag Archives: Rigid

Five Shunter Challenge Pt3.4: Comprehending Compensation

This time we continue the discussion about my plans to build these five kits with compensation. As with all things in life, there are a number of different ways to fit a compensation system and the five shunters being built require quite different approaches. Today we will look at the horn block compensation system.

What are Horn Blocks?

This DJH kit of the BR Class 02 Shunter is built as a rigid chassis, but after attempting to build the chassis a few years ago, I decided that I would prefer to include compensation. The rigid chassis is constructed on horn blocks (bearings that look like brass cubes), so I decided to purchase a separate horn block compensation kit.

The driving axle shouldn’t be compensated on a 0-4-0, so I started to prepare the non-driving axle for compensation. The compensation kit instructions include helpful illustrations, but I was a bit scared to discover that I would need to cut a wider hole in the chassis for the compensated horn blocks to fit into.

I built up the outer horn block plates and used these to marked out the chassis with a permanent marker.

2014-11-09 09.47.32LR

 

2014-11-08 23.19.14LR

 

I then cut out the square gap using a fine hack saw with a thread-like blade.

The advantage of this horn block system is that you can manually adjust the height of the driving axle and the amount of compensation either side using screws. This means that even if my cutouts are not identical I can urh… compensate.. for that with the screws. I must admit that I am really pleased with the result and the chassis runs really well.

2014-11-10 21.45.24LR

2014-11-10 21.45.05LR

x5 Shunter Challenge Progress

2014-11-11 20.41.42LR

BR Class 02 Diesel ShunterDJH

Chassis block constructed, compensation fitted.

Sentinel post war 100HP 0-4-0VBT – RT Models

Chassis block constructed, compensation fitted.

Ruston & Hornsby 88DSJudith Edge

Chassis block constructed, compensation fitted.

11001Judith Edge

Chassis block constructed., compensation fitted.

English Electric/Hawthorn Leslie 0-6-0DEJudith Edge

No progress

P.S. If there are any aspects of x5 shunter challenge that you want me to cover (be it soldering, equipment… anything at all) please do leave a comment or contact me by email. I will reply. You can also follow me on twitter for instant updates.

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Five Shunter Challenge Pt3.3: Comprehending Compensation

This time we continue the discussion about my plans to build these five kits with compensation. As with all things in life, there are a number of different ways to fit a compensation system and the five shunters being built require quite different approaches. Today we will look at the compensation system for the three Judith Edge kits.

Judith Edge kits can be built rigid or they can take two different types of compensation. They include etch lines for horn blocks (see the DJH BR 02 in the next blog entry) and they include their own ‘balance beam’ compensation system.

How do I build the balance beams?
I must admit that it has been the balance beam compensation that deterred me from building my Judith Edge kits for so long, as I just couldn’t comprehend how to put the beams together. I didn’t find the instructions that helpful in this regard (I’m a ‘copy the picture’, kind of guy). I couldn’t understand where to solder the axle bearings or how to create a pivot for the beams.

While researching some other peoples Judith Edge builds on RMweb and looking again at the very helpful emails that Judith Edge sent me when I first purchased 11001 (that I still didn’t really understand), it suddenly happened… Eureka!!! Everything written in the instructions and emails made sense. What I was failing to understand was the axle bearings are actually soldered on the insides of the balance beams (See the picture below).

You can see the balance beams on the inside of the chassis with the axle bearing soldered onto them.

You can see the balance beams on the inside of the chassis with the axle bearing soldered onto them.

You then use some spare metal rod or a track pin to create a pivot for each of the beams (the Peco track pins are quite useful in this regard).

Peco track pin acting as a pivot

Peco track pin acting as a pivot

A good tip is to put some paper between the balance beam and the side frames while soldering the pivot pin in place (to stop them soldering together).

 

This realisation of how to complete the balance beams was a fantastic moment for me, as it now means I can build any of the Judith Edge kits.

x5 Shunter Challenge Progress

2014-10-09 22.09.22LR

BR Class 02 Diesel ShunterDJH

Chassis block constructed.

Sentinel post war 100HP 0-4-0VBT – RT Models

Chassis block constructed, compensation fitted.

Ruston & Hornsby 88DSJudith Edge

Chassis block constructed, compensation fitted.

11001Judith Edge

Chassis block constructed. compensation fitted.

English Electric/Hawthorn Leslie 0-6-0DEJudith Edge

No progress

P.S. If there are any aspects of x5 shunter challenge that you want me to cover (be it soldering, equipment… anything at all) please do leave a comment or contact me by email. I will reply. You can also follow me on twitter for instant updates.

Five Shunter Challenge Pt3.2: Comprehending Compensation

Last time I discussed the difference between compensated and rigid chassis’ and my plans to build these five kits with compensation. As with all things in life, there are a number of different ways to fit a compensation system and the five shunters being built require quite different approaches. Today we will look at the compensation system fitted to the RT Models Sentinel.

The RT Models kit and instruction sheet are intuitive and explain the compensation system very well. The side frames include an elongated hole for the non-driving axle bearings to pop into, which allows the non-driving axle to rock up and down.

2014-10-08 17.58.37LR

A pivot for the non-driving axle is created using a v-shaped etch that makes light contact with the centre of the axle. The pivot allows the non-driving axle to deal with cambers and uneven track.

2014-10-08 17.57.42PSLR

 

2014-10-08 17.58.07LR

 

x5 Shunter Challenge Progress

BR Class 02 Diesel ShunterDJH

Chassis block constructed.

Sentinel post war 100HP 0-4-0VBT – RT Models

Chassis block constructed, compensation fitted.

Ruston & Hornsby 88DSJudith Edge

Chassis block constructed.

11001Judith Edge

Chassis block constructed.

English Electric/Hawthorn Leslie 0-6-0DEJudith Edge

No progress

P.S. If there are any aspects of x5 shunter challenge that you want me to cover (be it soldering, equipment… anything at all) please do leave a comment or contact me by email. I will reply. You can also follow me on twitter for instant updates.

Five Shunter Challenge Pt3.1: Comprehending Compensation

Last time I discussed setting up a loco chassis with a chassis jig, but these five kits will differ from any of my previous kit builds by being constructed with compensated chassis’. All of my previous loco kits have been built on a rigid chassis.

What is a rigid chassis?
Rigid chassis kits have very minimal up/down/left/right play on each axle in the chassis, but all of the wheels maintain contact with the track. It is essential that the chassis is set up as square as possible using this technique.

What is a compensated chassis?
If a chassis is compensated, then it essentially has a bit of sprung suspension on some of the axles, allowing the loco to cope with uneven track joints. A compensated chassis can also cope with some quirkiness in your building abilities, such as slightly wonky wheels and axles.

It is apparently beneficial to include compensation on one axle of an 0-4-0 locomotive kit to help ensure the loco runs well. As three of my loco kits are 0-4-0 I thought it was time to take the plunge.

I first read about compensation in Iain Rice’s book titled ‘Locomotive kit chassis construction in 4mm‘. Although I understood the principles, I really struggled to comprehend how to build a loco with compensation. As with all things in life, there are a number of different ways, and the five shunters being built require quite different approaches. I will discuss each locos compensation in more detail next time.

x5 Shunter Challenge Progress

BR Class 02 Diesel ShunterDJH

No progress

Sentinel post war 100HP 0-4-0VBT – RT Models

The chassis is folded up and the axles are fitted. The instructions are nice and simple to follow.

2014-10-08 17.58.44-1LR

Ruston & Hornsby 88DSJudith Edge

Side frames cleaned up

11001Judith Edge

Spacers fitted

2014-10-09 20.10.27LR

English Electric/Hawthorn Leslie 0-6-0DEJudith Edge

No progress

P.S. If there are any aspects of x5 shunter challenge that you want me to cover (be it soldering, equipment… anything at all) please do leave a comment or contact me by email. I will reply. You can also follow me on twitter for instant updates.