Features
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BUMP
This set included the first instance of the "BUMP" or Big Ugly
Motor Piece. This large monolithic block contains a battery box
for 3AA batteries, an on-off switch on the bottom, a polarity switch on
the top, and a pair of outputs. The lateral hole through the rear
of the block can be used to drive an axle, as can the longitudinal hole
at the rear. The rear output is geared down more and is used to
power this model.
One might reasonably ask why this thing needs to be so big just to house
one motor. It doesn't. As can be seen in the third image,
the interior is mostly empty. The part is made to be turned into a
car with minimal effort. Add a an axle to the front and back and
you are ready to go. The image also shows a fascinating
combination internal ring gear and pinion gear used for large reduction.
At only 4.5V, you might think this motor would not have enough power to
actually drive a model. However, it has quite remarkable power and
moves the vehicle very well. As can be seen in the computer
image, the white output is geared down a further 3:1 at the blue 24
tooth gear, and then the rest of the drive train is a very simple 1:1 with no differentials.
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Engine
The model has a rear mounted V-4 engine with transparent
cylinders. This is not a functional engine in that it has no
pistons or crankshaft and is not connected to anything. It is
there only for play value. When the cross axle at the rear hits an
obstacle, rubber bands eject the engine.
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Suspension
This model has very simple unsprung pendular suspension at the
front. This doesn't absorb any shock, but does help keep all four wheels on the ground over uneven terrain.
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Finish Gate
Parts and instructions are provided for a gate. The power
switch for the BUMP is connected to a long vertical axle. As the
car passes under the gate, the axle hits the cross beam and shuts off
the car. If the adjustable stops on the vertical beams are also
extended into the gate, the engine will be ejected.
The car is quite fast and has no steering, so getting it to go through the gate from any distance is quite difficult.
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Wheels and Tires
This set uses 4 of the 56x30 balloon tires and the metallic
silver painted wheels. It also uses uncommon 5.5L white axles.
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