New Scientist Breaking News - Human-powered hydrofoil seeks jumpy riders: "The first human-powered commercial hydrofoil, resembling a bizarre cross between a pogo stick and a jet ski, has gone on sale.
Riders operate the 'Pumpabike' by bouncing up and down on a small platform at the rear of the contraption, whilst holding onto a steering column at the front.
In doing so, they can reach speeds of up to 16 knots (30 kilometres per hour), says inventor Mike Puzey, who is based in Johannesburg, South Africa. Puzey’s design has no propeller and involves no pedalling. Instead, thrust comes entirely from the hydrofoils beneath the craft.
The vehicle is made from plastic and aluminium, and weighs just 14 kilograms. It has two hydrofoils, a large rear one that generates 80% of the lift, and a smaller one at the front for steering and stability. Each craft costs between $800 and $1200, depending on its configuration and where you buy it"
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