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Launoy and Bienvenu’s toy was a rudimentary...
Launoy and Bienvenu’s toy was a rudimentary helicopter with a central
shaft, corks at both ends with feathers angled to provide lift as they
spun, and a bow (as in bow and arrow) drawn taut by winding its string
around the shaft.
Havacılığın doğuşu ve ilk kanat prototipleri üzerine yazılmış bir kitaptan alıntıdır. İçinden çıkamadım acil dönüş yapabilen olursa çok sevinirim.İyi akşamlar
Fullfíggjaðar umsetingar
Launoy ve Bienvenu'nun oyuncağı...
1