Human Powered Vehicles

An annual road racing contest in California is the place to see the latest innovations in human-powered vehicles.



071 human powered vehicles 3 upright bike w shield
Some entrants merely adapted wind-cutting fairings to modified bicycle frames. This tandem is capable of traveling at over 43 miles per hour.
BOB KEIM
071 human powered vehicles 4 hpv frame
Human powered vehicles typically use ultralight frames just strong enough to serve their purpose. Notice the speed-inducing "stiff" gearing ratio shown here.
PHOTO: BOB KEIM
071 human powered vehicles - cal poly phoenix
The radical Cal-Poly/ A.S.M.E. Phoenix features an aerodynamically favorable composite body (with a tubular substructure), minimal ground clearance, and a top speed near the "double nickel."
BOB KEIM
071 human powered vehicles 2 greg johnson
Greg Johnson's 50-MPH machine relies on a lightweight, fish-shaped fairing and "prone power" to cut down on aerodynamic drag.
BOB KEIM











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