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A helicopter powered by a student pedalling on a lightweight bicycle-style frame has stayed airborne for 50 seconds - smashing the team's previous record of just 11 seconds.
The record but the team posted a video online showing the craft wobbling into the air under pedal power, piloted by University of Maryland engineering student Kyle Gluesenkamp.
The students hope to win a $250,000 prize for human-powered flight - but the helicopter, Gamera II, has to stay in the air for a further 10 seconds to meet the standards for the American Helicopter Society Prize.
More deets and video at the Source Link,