Tuesday, September 18, 2012

Alternate Solution 1


            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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