Speed Control - Rail King AeroTrain Diesel Locomotive Operator's Manual

Speed Control

M.T.H. engines equipped with Loco-Sound have speed control capabilities that allow the
engine to maintain a constant speed up and down grades and around curves, much like an
automobile cruise control. You can add or drop cars on the run, and the engine will
maintain the speed you set.
While the engine is programmed to start with the speed control feature activated, you can
opt to turn it off. This means the engine's speed will fall as it labors up a hill and increase
as it travels downward. It is also affected by the addition or releasing of cars while on the
run. Because the engine will run more slowly at a given throttle voltage when speed
control is on than when it is off, you should adjust the throttle to a lower power level for
operation with speed control off to avoid high-speed derailments. When speed control is
off, the volume will drop to allow for better low voltage operation.
To turn speed control on and off, put the engine in neutral, then quickly tap the
transformer's Horn button one time then quickly tap the Bell button two times, allowing
approximately ½ second to lapse between each quick button press. Two horn blasts will
indicate that the engine has made the change. Repeat the 1 horn, 2 bells code to return it
to the other condition. You will want to do this during the initial neutral upon start-up if
you ever couple this engine to another engine that is not equipped with speed control to
avoid damaging the motors in either engine. Each time you shut down the engine
completely, it will automatically turn speed control on.
Speed Control
Two Horn Blasts
Place
=
Horn Bell Bell
Engine into
Repeat to Return
Neutral
to Normal Condition
Locking Locomotive Into A Direction
You can lock your engine into a direction (forward, neutral, or reverse) so that it will not
change directions. To do this, put the engine into the direction you want (or into neutral
to lock it into neutral), run it at a very slow crawl (as slowly as it will move without
halting), and quickly but firmly tap the Horn button once followed by three quick taps of
the Bell button, allowing approximately ½ second to lapse between each quick button
press. Two horn blasts will indicate that the engine has made the change. The engine will
RailKing AeroTrain Locomotive 7