Human Powered Vehicles

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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
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."
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Greg Johnson's 50-MPH machine relies on a lightweight, fish-shaped fairing and
Greg Johnson's 50-MPH machine relies on a lightweight, fish-shaped fairing and "prone power" to cut down on aerodynamic drag.
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Some entrants merely adapted wind-cutting fairings to modified bicycle frames. This tandem is capable of traveling at over 43 miles per hour.
Some entrants merely adapted wind-cutting fairings to modified bicycle frames. This tandem is capable of traveling at over 43 miles per hour.
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Human powered vehicles typically use ultralight frames just strong enough to serve their purpose. Notice the speed-inducing
Human powered vehicles typically use ultralight frames just strong enough to serve their purpose. Notice the speed-inducing "stiff" gearing ratio shown here.

As we’ve noted in this magazine before, a bicycle is about
the most efficient transportation device yet developed.
With its light weight and its highly effective roller
chain-and-sprocket drive system, the two-wheeled conveyance
is about five times more energy-thrifty–when distance and

  • Published on Sep 1, 1981
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