The muscle-powered pedal crank activates a propeller and the filigree aircraft takes to the skies by means of massive wings: this is what Fusha Sakai, a member of the Sakai Windmill Association at Osaka Public University in Japan, has achieved. This association is a student-led group dedicated to human-powered flight.

The massive span of the wing and the fragile-looking flight behavior will probably put a stop to the immediate spread of such flying machines, but it is undoubtedly impressive that you can get an aircraft into the air using muscle power.