Reels tagged #helicopter
Inventions
Helicopter designs are 500 years old
Leonardo da Vinci sketched an aerial screw around 1489. A workable helicopter took until the 1930s, because no engine before then had enough power for its weight.
Leonardo da Vinci sketched an aerial screw around 1489. A workable helicopter took until the 1930s, because no engine before then had enough power for its weight.