Barcelona-based designer Oscar Viñals unveils the Sky OV, a futuristic supersonic plane with arrow-shaped silhouette and foldable wings. Equipped with bladeless turbojet engines based on pulse detonation, the Sky OV promises a cruising speed of 913 mph and a max speed of 1,141 mph. The eco-friendly concept features hydrogen fuel, solar power integration, and can carry up to 200 passengers in a luxurious cabin.