Sergey Brin’s 400-foot airship reportedly cleared for takeoff
Google co-founder Sergey Brin quietly founded LTA Research in 2015, and its massive Pathfinder 1 rigid airship prototype is preparing for its first outdoor flights, with a view to speeding up disaster response and starting zero-infrastructure cargo flights. At 407 ft (124 m) long and 66 ft (20 m) in diameter, it's considerably longer than the "flying buttocks" of the Airlander 10, although less than half of its width. It might not qualify as the world's largest aircraft, but it's still absolutely enormous, approaching…