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Re: How do i make this part??
I like your hub design. It transfers the wheel load to the gearhead with minimum cantilever, and that will be important in your application.
Quite a few years back, I was part of a rookie college-level solar racing team. We built custom wheels for our car using 20" rims, and our hubs had a similar aspect ratio to yours -- about 3.5" spoke-hole circle and 3" axial width. Local bike shop guys assembled them for us using a three-cross pattern to help with the side loads. Our car weighed about 700 pounds (plus driver) and had about 5 ft. track width. Those wheels held up nicely during the transcontinental race, with no problems apart from the expected few flats. We never damaged a rim.
Our hubs were machined from billets using a process similar to the one Don Rotolo described above.
What diameter rims will you use?
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
 since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
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