The Helios project
I devised this entirely on my own before discovering Wally's wheel, I will take some inventors licence and dub it Helios.
From the greek to revolve and the associated meaning of the sun, the double meaning was too apt to pass up for a wheel driven by solar power. I'm writing a paper about the working fluid for either a patent or a scientific journal and can't disclose the details about the fluid. If you are keen on building a small device for testing, Hexane(petroleum ether) will work ok. http://tech.groups.yahoo.com/group/MintoWheel/
Is where we discuss the technology in depth. "