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1. Build an electric helicopter with batteries and a pedal-powered dynamo 2. Pedal for hours/days to charge the battery 3. Fly helicopter on battery power 4.
by Andys 17y ago
1. Build an electric helicopter with batteries and a pedal-powered dynamo
2. Pedal for hours/days to charge the battery
3. Fly helicopter on battery power
4. Collect $250,000