Design
#1 uses the simple T shaped frame that is common in RC Land Sailors. However, the T is inverted so the
intersection faces forward. Keeping with
the original idea to keep the design lightweight, the frame materials are strips/rods
of sheet metal, preferably made from aluminum.
The batteries do not need to be very powerful, as only the two motors
and the receiver need power, connected with insulated copper wiring. The design will be about 40 inches long and
30 inches wide for stabilization purposes.
The wheels are 90 mm urethane roller blade wheels with ball bearings on
the axle for speed purposes.
The design works by having the boom
connected to two motors in the front by strings. The motors are able to withdraw and release
string in order to pull the boom in different directions. This action is controlled by the user who
signals the boom to move depending on where the sail is in relation to the
wind. The ball bearings in the wheels will
reduce friction between the axle and the wheel when moving during the racing
testing stages.
This design is stable in the front
because of its width, being that stability is one of the most important factors
to take into consideration. With more
traction in the front, the rig will turn easier without sliding on the
surface. However, the design is less
aerodynamic with most of its mass in the front.
Also, the design may require power steering in order to turn, as two
wheels in the front may make sharp turns difficult. Implementing power steering is difficult, as
the motors that operate the strings that turn the boom are in the way of where
the steering for the front wheels would be.
Figure 1
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