What's the biggest problem with making a really succesful human powered aircraft?

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yes, of above
"more efficient human powered aircraft reality?"
aware human powered aircraft exist , fly leanest, lightest , powerful of cyclists power , ultimate of light materials huge long wing no wind. crossing english channel close water far going go (especially since, having done it, planes retired.) technology being use make solar powered planes enough batteries fly through night. http://www.google.com/search?hl=&q=solar...

is humans aren't strong enough power it, or finding material light enough, or else? new technological idea make more efficient human powered aircraft reality?


Science & Mathematics Engineering Next



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