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Wise Words

Acrobat Reader is required to view Hi-Res Pages.

The CJM Saturn Chassis

The foundation of any model locomotive is the chassis. The discerning modeller requires smooth and quiet operation, pulling power, prototypical looks and reliability. In the Saturn Series chassis, CJM believes that you should have all these. In 1994 CJM was commissioned to produce a flywheel drive chassis capable of 22 actual miles a week for the Channel Tunnel Group Ltd. This was to be used on the 100foot layout at the Eurotunnel exhibition centre. The chassis first appeared under the class 92. Since then it has progressively evolved into the Saturn chassis fitted to classes 37, 47, 50, 56, 59, 60, 66, 89 and 92. In addition, a Bo-Bo version is available for the class 67 and 73 with a small number of HST units also available. 2007 will see new versions for multiple units and additional loco applications.

As you might expect from a chassis developed to such exacting standards and operated in such testing conditions the Saturn series has a number of features including-

• A powerful Can Motor

• Twin Fly wheels

• Fine scale blackened wheels

• Scale axle spacing

• Proven reliability

This chassis combined with the superb replica locomotive bodies means that you are guaranteed a model which both looks and acts the part.

One of the first things you might notice is that the chassis is much heavier compared to typical 'N' gauge chassis. Importantly the weight is concentrated over each bogie giving it high tractive effort and excellent electrical pick up qualities. This means that it typically starts creeping between 1 and 2 on the average controller even with a heavy load! Its top speed is seldom going to be achieved on the average layout, but you will appreciate the whisper quiet operation and the coasting to a stand as the power is turned off. On the Eurotunnel layout they took several feet to stop. Gradients will be crested with ease and perhaps most importantly, its unlikely to fail.

Since 1994 in excess of 2000 units have been produced with reliability of almost 100% -

• Only 2 motors replaced, both having received 16 AC

• No brushes replaced.

• No gears replaced.

• Some 2-5 locomotives are serviced each month consisting of wheel cleaning, oiling of contact plates and removal of fluff, hair, grit etc from gears. 

Other repairs have sometimes been needed but sadly this has been as a result of idle curiosity or dropping (or both!) 

Other applications 

Customers with locomotives in classes 37, 47, 50, 55 and HST may purchase a Saturn Chassis to update their models.

Production of complete class 37, 47, 50, 55 and HST models, all with Saturn Chassis and super detailed bodies, painted in a wide selection of liveries are available to all.

CJM Bo-Bo Flywheel chassis under an Intercity livered HST 

 

hi-resolution photo studies

The following pages below contain Hi-Resolution images, and Adobe Reader is required to view them. Unlike other manufacturers, at CJM we want you to see and appreciate all the accurate detail and work involved, however please remember you are looking at models that are approximately 4-5 inches long, with the ability to zoom so that components are the same size as the real loco! Its cruel and sometimes painful, especially when we spot the odd problem with the model, that you cant even see normally with a magnifying glass!

	Hi-Res Pages coming soon

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