In the Wright Stuff/Helicopter event, what serves as the energy source?

In the Wright Stuff/Helicopter event, the energy source is elastic band torsion. This mechanism utilizes the potential energy stored in a twisted elastic band. When the band is released, this stored energy converts to kinetic energy, allowing the helicopter to rotate its blades and generate lift.

Elastic bands are particularly suited for this type of application because they can be coiled and provide a consistent source of tension as they uncoil. This method is commonly used in building model helicopters and planes for competitions because it allows for a simple, lightweight design that effectively harnesses mechanical energy. This approach contrasts with solar panels, battery packs, or wind energy, which involve different technologies and principles not typically utilized in the Wright Stuff/Helicopter event.