Semicircular Wings give this Hybrid eVTOL an 800 Mile Range with 30% Less Power Consumption
Could the most efficient VTOL design of the 21st century have been sitting in a patent office since 1928? Willard Ray Custer thought so, and spent decades trying to prove it. His channel wing concept, which set propellers into semicircular cutouts in each wing to blast high-velocity air across the lifting surface at low forward […]










