> I've never done a double slip, though I've built quite a few switches. If you
> can get a copy of Iain Rice's "An Approach to Building Finescale Track in
> 4mm" you'll have a good start. It's a British book and so the rail is funny
> shaped, but most of the techniques in working with the rail, and the gauges
> and tools you'll want to have, are applicable to any scale or rail type. His
> results are extremely good and the book is well written and densely
> illustrated with both drawings and photos.
Another good book is Trackwork Handbook for Model Railroads by Paul
Mallery. This was published in the US by Carstens Publications. Also,
there was a good article called Double Slip Switch by Wayne Wilson in
the December 1995 issue of Mainline Modeler.
> Rice says that a double slip has an "unjustified reputation as the 'north face
> of the Eiger' of model trackbuilding". I'd like an excuse to try one!
> As for reliablitity, my experience is that if it doesn't work well, you've
> made mistakes. A switch that's built right doesn't cause derailments unless
> the equipment passing through it has misgauged wheels. In fact, if the
> switchwork is done properly you can press a car down on the rails, close your
> eyes and roll it through without being able to detect the points or frogs by
It seems to me that the biggest problem with a double slip is the
interior frog. In his book, Mallery presents an argument for why
rigid interior frogs will not work for a number 8 or higher double slip.
He reomends using moveable points for the interior frogs. This is also
the approach used by Wilson. I am planning a module with a number 6
double slip and am leaning towards the moveable frog design. It just
looks more reliable. Anyone have any experience with this?