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Saturday 5 August 2017

Project 17 - Storage Cassette

This storage cassette/fiddle yard is made from 5mm foam board. This time I built in ample supports to avoid sagging of the track bed that was evident on the scenic module.

Being portable the cassette can simply be turned around to reverse trains and/or slid left and right  for track selection.

The left hand track is the single track line from Worgret Junction and the right hand track a head shunt for the extensive goods yard at Swanage.

There are a number of options for track electrical continuity. I could use plug and sockets. I could use flat copper strips soldered to the copper clad end sleepers and bent over the ends on both the scenic module and cassettes . When the cassette and scenic module are brought together the strips touch giving electrical continuity. Both these methods require additional cassette alignment and locking mechanics.
The method I opted for is rod in tube as this provides electrical continuity, alignment and locking all in one device. At first I thought about buying some brass rod and tube. Thinking about a cheaper alternative I had a brain wave that I could roll up some brass strip, found in my spares box, into a tube and use mains copper wire for the rod. The tube was formed by holding the wire against the brass strip in a vice, bending the brass around around the wire and then repositioning to bend a bit more and so on until the tube was formed. A tag was retained for soldering to the copper clad sleepers.

In use the rods are out and the cassette manually aligned. The rods are then inserted in the tubes and are a tight enough fit to hold the cassette firm during operations.

The two tracks at this end of the layout are parallel but at the other end there are four tracks and two of these are at odd angles. I'll need to make another double track cassette like this one and one or two single track cassettes for that end. More cassettes could be made to hold a range of fully formed trains. I'll wait until operations start to see if that is worth while.

Finally, a portable buffer stop is simply made from foam board with two stiff, galvanised wire pieces inserted. These locate in holes in the track bed.

To Part 25.

To Part 1.


Jim Jackaman said...

Nice idea to use the rod and tube..I'll have to pinch that!

David Smith said...

The concept is nothing new. Possibly the construction method is novel. It works very well.

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