Thomas Frederick Bergman
The project is a dual hull powerboat
that is remotely controlled. It is designed to be a recreational activity
for its user. The boat is two feet long and is powered by two electric
motors. It has a mechanical speed control out of a Tamiya Midnight Pumpkin.
The power plants are from electric remote control racing cars. The boat
is equipped with a dual rudder system. Another design considered was to
have a single prop mounted in the center of the boat. There was also debate
whether to have a dual rudder system or to have a single rudder and where
to put the dual rudder system if dual was decided to be desirable. Along
with design ideas was discussion with what to fabricate the hull out of.
The idea of aluminum, or of fiberglass seemed to be the most feasible.
Fiberglass was decided on because it was more flexible and did not require
any welding skills. The original mold for the fiberglass was made out of
Styrofoam and ended up melting due to the fumes give off by the hardening
fiberglass. This put the project behind schedule. Next wood was purchased
and screwed together to form a frame and aluminum screen was stapled to
the outside of that. Then the fiberglass was laid across the screen. The
initial intention of the design was to have a single gas powered engine.
That option ended up being very costly and would have taken much more time.
The workers at Hobby World in Grand Rapids were helpful in suggesting that
using the brass tubing and brass rod for the drive shaft. For a connection
they suggested some common fuel tubing because it would easily slide over
both the engine shaft and the drive shaft and would act as an U-joint between
the two. After a little bit of soldering to add another engine connection
the project was placed in the hull and screwed together.