A Granny-Trike/Rickshaw design

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Google had a contest called, "Innovate or Die", and the winner filtered brackish water as they pedaled a Granny trike!  http://googleblog.blogspot.com/2008/01/team-aquaduct-wins-innovate-or-die.html

So, this is what inspired me to draw this, and now I'm in the process of building a prototype! 

Another option would be to use 1.5" to 2" diameter sched40 threaded aluminum conduit that is bent into an arch with a hydraulic hand pump pipe bender. (Buy one for $150 through Harbor Freight Tool Co.)

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