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I do remember reading a book as a kid, where it explained that our human muscles are relatively x70 less stronger to birds when compared to the body weight - e.g. you need on average to be x70 stronger with your hands to be able to flap and fly.... But I'm not sure how accurate that is. It was fun fact (or not? not sure... but when I saw the guy flying, I guess it might've been faked)

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I remember seeing a similar calculation that for a human to fly using scaled bird wings one's pectoral muscles would have to be about 6 feet thick.

So we're not talking arc reactor levels of power, but probably more than one can output from a small backpack of batteries like in the vid ;)

> but probably more than one can output from a small backpack of batteries like in the vid ;)

Actually, Lithium-Polymer battery packs capable of a sustained output in excess of 2kW weigh only a few pounds.

People can do 2kW for a little while, you need closer to ~50kW or really really big and light wings. At which point your 200lb of battery's and moters bump that to ~100kW.

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