Sikorsky Firefly

The Sikorsky Firefly is an all-electric helicopter built for research purposes by Sikorsky Aircraft. It has been called the world's "first all-electric helicopter".

Source: Wikipedia — Sikorsky Firefly (CC BY-SA 4.0)

Sikorsky Firefly

The Sikorsky Firefly is an all-electric helicopter built for research purposes by Sikorsky Aircraft. It has been called the world's "first all-electric helicopter".

Source: Wikipedia "Sikorsky Firefly" · CC BY-SA 4.0

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