Note the Sperry-designed hydraulic throttle (upright control arm with
a knob, at right). This type of system provides infinate constant smooth
acceleration, the hydraulic line connecting to the governor which in
turn controls the speed at which the diesel engine runs. It is an old
system used on doodlebugs, not only on Sperry Cars. The airbrake is
directly ahead and appears to be an old doodlebug type. Note the open
front window, something unusual in railway equipment. Note too the small
counter device just below the air gauge on the left post. It is manually
flipped each time a backup move is made to check the rail. The control
box at left has a speedometer, speed telegraph, lights, switches and
signal buttons. Robbin Rekiel.
