Хеликоптерният дизайн на Леонардо да Винчи може да направи съвременните дронове по -тихи и скрити
Летяща машина, наподобяваща хеликоптер, планиран от Леонардо да Винчи, може да се употребява за създаване на по -тихи и по -добри съвременни дронове, съгласно ново изследване, оповестено в списанието. Famous for his paintings such as the Mona Lisa and The Last Supper, Da Vinci was also an engineer and architect who conceptualised flying machines centuries before any of these machines became a reality for humans.
The prototype helicopter called Leonardo's aerial screw was conceived in 1480 and is regarded as the earliest known designs for a lift-generating rotor. Rajat Mittal at Johns Hopkins University in Maryland and his colleagues found that the " aerial screw " may require less power to generate the same amount of lift as a conventional drone rotor.
" We were surprised, " said Mr Mittal, adding: " We went in thinking that because the shape of this spiral screw is just completely, in some sense, ad hoc, it was intuitive that the aerodynamic performance would be so bad that w...
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