Photographs of TT Scale
 

Collection 5
Elmer Mckay's new TT scale dual gauge interchange module, under construction.



The Module Views
   The module is a town where a standard gauge engine facility and interchange with the narrow gauge RR is located.
   Module construction is blue builders styrofoam sheet glued to a wood framework.  Homasote roadbed was then glued down for the track.  (HOn3 Homa-Bed).  Some of the track is dual gauge and hand laid; not much, but some.  The two crossings are hand laid, one of which is dual gauge.
   The white lines on the control panel represent the two main lines.  The upper is the Standard Gauge main line, and the lower is the Narrow Gauge main.
   Both lines can operate independently from each other, although part of the SG main is dual gauge, and is the NG passing track for the NG main line.  The SG passing track is through the yard.
   The small white and yellow knobs on the fascia board are remote-manual turnout control throws.  These use a standard slide switch that is actuated by a tubing arrangement from the front fascia of the module.  The switch handle has a stiff wire that goes up to the turnout and throws it.  The slide switch allows for electrical switching of frog power when the route is changed.  A photo of the development unit is shown at the bottom of this page.

Left end


Center


Right end


s              1                        2            3              4

  Track 1 is NG Main; Track 2 is Dual Gauge siding; Track 3 is Std. Gauge siding, and 4 is Std. Gauge Main.
   The turntable is standard gauge and started life as a Walther's N scale turntable.
   If you start at the front of the module, where the sidings are, the tracks are as follows:  NG siding, SG siding, NG main, SG main / NG passing (dual gauge), SG passing, yard track, yard track, engine track, engine track.
   The dark square objects under the track in different places (Item 3 below) are K-dee #308 un-coupling magnets that have been cut in half.  Since I use Micro-Trains couplers, un-coupling operations are automatic.

Special Track work Used

   Item 1 is a dual gauge turnout that was made using an N scale turnout as the starting point.  Some ties were cut from it and longer ones installed.  The third rail was then laid on the outside of the turnout (inside turn).  Short pieces of tie were then added to fill in and extend the length of the remaining ties.  Both SG and NG equipment will pass through the curved route.
   Item 2 is a NG crossover.  This shifts the NG center rail from one side to the other inside the standard gauge track.  The points do not move, and operation is simple and smooth.


   This is another dual gauge turnout.  This one was modified from a standard gauge one.  The hinge point of the straight point rail was moved.  The hinging point is normally in line with the yellow arrow.  I relocated it using a straight pin and brass tube, to where the white arrow is.  The green arrow is the narrow gauge rail.
   When the turnout is set for the straight route, the point lines up with the NG rail.  Both SG and NG equipment will pass through on the straight route.  The curved route is for SG only.
   This is a section of track work that separates or combines NG and SG routes.  The points do not move, and operation in both directions is smooth.
   This is a hand built unit.  It was constructed using a minimum number of printed circuit board ties.  The rail was soldered to these ties.  Then the unit was installed and wood ties added to fill in.  The white arrows point to two of the PCB ties.
   An un-coupling magnet will go in the depression under them, and then more wood ties will be used to fill in.  Electric power for the frog is switched by the NG turnout just out of the photograph to the upper right.
   This is the remote-manual turnout control throw set up.  The hole at the side of the slide switch handle would actually go up through the bench work to the turnout throw.  The blue areas are masking tape that is wrapped around the red nylon rod.  The Tape holds the rod, then epoxy glue holds the tape to the supports.
   The switch is held by a resin casting.  (These castings are available in a kit of two, plus instructions.  The castings have dimples molded in where you need to drill and tap two holes for the switch, and dimples for two holes for mounting it to the benchmark.  The switch and rods are not included).


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Last updated 10-6-2000