*m*e*n*u | 207
- Video #656
s *m*e*n*u-09L | S Plans-IAC
on this page:
1 S-gauge Wiring Sketch [below]
Fig 2 G-scale Equivalent
Wiring Diagram [below]
The video (link
is in the menu to left),
made by Mark Anderman of the Susquehanna S Gaugers, at the April 2007
"Steamup" in Williamsport Pa, shows a demonstration of an automatic
control system they made to operate 3 American Flyer trains on one
circle of track, using all stock AC Gilbert parts. They used a siding
to hold 2 trains, plus a 3rd block operated by a semaphore on the
2. All Stock AF
The system shown
in the above S-gauge video uses all stock Gilbert parts. The converging
switch is used as a relay to control the 2 siding blocks, and a Gilbert
semaphore controls the 3rd block in the mainline. They used the
pressure-sensitive Gilbert track trips to control the switches and the
B. Remove The 3rd Block ?
We believe this
system could probably be modified by removing the block '3' in the
mainline, and using just the 2 blocks in the sidings. The semaphore
would control power to the sidings
If you can visualize.
at about 2/3 of the way around the loop, the train on the mainline
would pass over at 'T2' (green) track trip, which would "release" one
of the trains parked on the sidings, thus maintaining spacing between
trains, but without using the 3rd block on the mainline --see Figure 2
This scheme is
demonstrated in the largescale Video #1 "How It Works" which shows the
same arrangement in largescale -- links given above in Para. 2. Notice
the operation is a little SMOOTHER, because when you remove Block 3,
then trains don't stop on the mainline.
The Wire That Used To Go
To Block 3
On the S wiring
diagram, you would remove Block 3. You would take the wire that
previously ran from the semaphore to Block 3, and instead route it to
switch M2. When the semaphore is red, no power would go to either of
the siding tracks hooked to to switch M2. When the semaphore changed to
green, the power would be routed to whichever siding switch M2 is
aligned to. .... make sense ?? No? Try watching the G-scale video.
C. Comparing The 2
below is shown the S gauge wiring diagram by Mark Anderman (notes in
red were added by James Ingram). Following the S drawing, is the
G-scale equivalent drawing.
Components Numbered Same
On Both Drawings
"Stop blocks" B1
and B2 -- These appear on both drawings, in the sidings. 'Block 3' on
the S-gauge drawing does not appear on the G scale drawing, because the
3rd block is not used.
Track trips T1, T2, T3,
& T4 -- On the S drawing, these are stock Gilbert
pressure-sensitive track tricps. On the G drawing, there are stock LGB
reed switches activated by magnets on the bottom of the loco. They both
accomplish essentially the same result -- they send an electrical pulse
to throw a switch or relay when an engine passes over them.
Relay 'M3' -- On the S
drawing, this is the Gilbert semaphore. On the G-scale drawing it
either an LGB semaphore, or an LGB DPDT relay.
Relay 'M2' -- this
routes power to 1 of the 2 sidings. On the S drawing, it is a Gilbert
switch, which has relay capability built into it. On the G drawing, it
is an LGB relay.