Final Design and CAD Model
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A total of five concept designs
were modeled, three side-by-side, one back-to-back, and one with both
riders facing forward in line with each other. These were all
compared, and each team member filled out a decision matrix
individually, and then all scores were averaged for the final
result. A summary can be seen below. The back-to-back
design clearly beat the other choices. It was also interesting to
note than every team member individually chose the back-to-back design
as their individual top choice.
 Summary of decision matrix results. The design was refined even more
after it was selected. The frame was more accurately modeled, and
COSMOS analysis was done to determine the strength of the frame and to
further reduce weight. We were able to find the most light-weight
design possible by continually making changes. The steering was
accurately modeled, the chain routing was planned, and all components
were selected. Computer models of humans were placed in the CAD
design to verify the size of the HPV. Below are a few
pictures of the computer model, showing what will be built in the
spring. The fairing shown is not exactly what will be built, but
is similar and shows the overall shape.
 Isometric view of HPV with full fairing.  Front view of HPV with full fairing. The green bars are the tie rods.  Side view of HPV with full fairing. The center height was increased to accommodate the riders.  Isometric view with riders. fairing removed to show detail of frame and overall layout.  Side view of HPV with riders.
©2007 Jeff Bartels 01/23/2007 (Back) |