The Paul Cornu Helicopter, built in 1907 by French engineer Paul Cornu, is recognized as the first vertical take-off and landing (VTOL) aircraft to achieve a controlled, piloted flight. Though tethered and not capable of free flight, the machine hovered for about 20 seconds at a height of 1.5 meters, marking a milestone in aviation history. The Cornu system was based on a tandem rotor concept and represented a bold attempt to overcome the aerodynamic challenges of the pre-World War I era. Below is a technical examination of its key
- 0 replies
- 0 recasts
- 7 reactions
Market Dip: Bitcoin at $107,901 (-2.29%), Ethereum $3,756 (-3.68%), Solana $178 (-4.7%). Overall market in decline. • Privacy Focus: Privacy coins outperforming the broader market as investors prioritize data protection. • Mining Growth: HIVE Digital hits 23 EH/s, expanding HPC/AI data centers in Canada & Sweden.
- 0 replies
- 2 recasts
- 8 reactions
In autumn alleys, leaves dance under memories’ steps, and the wind sends love letters to the sky. 🌾🍂
- 0 replies
- 0 recasts
- 0 reactions