The Trolley Hill Problem
I Recently worked with BNSF Scotty on the OGR forum to solve a fun problem
regarding trolley operation on hills.
Scott's original post: Does anyone know if it's
possible to install TAS's EOB into one of Walt's Trolley's? I love his
trolley's, my trolley line is on an incline however, and it rides up real nice,
but on the return down, it flies down to an abrupt stop, I'm afraid one of my
passengers may get injured.
Was thinking EOB may help resolve that, short of getting rid of my incline and
redoing that entire section of the layout....
The section at the top of the hill will throw the switch to apply low voltage
to the hill.
The section at the bottom of the hill will throw the switch the opposite way,
higher voltage for the hill.
The trolley starts at the flat at the bottom of the hill and heads towards the
hill. As it hits the insulated section it throws the snap relay to provide
higher voltage onto the hill.
The trolley then climbs the hill.
At the top of the hill it hits the isolated section that throws the snap
switch the other way providing lower voltage on the hill. The trolley goes to the end
and hits the reversing section for the controller and reverses.
On its way back it again activates the snap switch but to the same position. It
then goes down hill on lower voltage and repeats the pattern....
Level, Uphill and Down Power are three AC power sources connected in Phase. They
can be old 35 watt transformers to run just one trolley. The 14v is a fixed 14 V
AC again in phase with the rest.
You use the three transformers to control the power needed for three different
Level - flats at top and bottom of hill
Uphill - slightly higher voltage to climb the hill with
Down - Slightly lower voltage to slow descent.
The snap relay has another A B Common set of contacts that you can use to light