When I was browsing one of my social media account, I have encountered a very interesting topic which was about a human-powered helicopter. The invention was built by young engineers and it was four-rotor helicopter that spans 100 feet and only weighs 80 pounds. The 100-foot-wide rickety machine worked through a full effort on pedaling and they tried it until it reached 10 feet above the ground and it was successful.
Just click on the link for the full details.
View: https://www.youtube.com/watch?v=emK-qIbuJ-k
Just click on the link for the full details.
View: https://www.youtube.com/watch?v=emK-qIbuJ-k