eli5: Why is it not possible to build bird-like attachable wings that account for body proportions to allow humans to fly or glide around?
In: 2102
Birds do not scale up well. Making its body proportions twice as big makes it have 8 times the weight and so requires eight times as much ‘wing’ which would be about 2.8 times as long.
Humans are significantly bigger than birds, and to worsen this, we’re much denser. Then, we don’t have the muscles that birds do to keep us moving.
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