The world's largest flying vehicle, the Airlander 10 is getting even bigger before its commercial release. While the previous prototype measured 302 feet in length, the revised version will span 320, with a more streamlined shape that will reduce drag. The resulting craft will emit up to 75 percent fewer emissions than current options, carrying up to 16 passengers on journeys up to 4,000 nautical miles. A new propulsion system has also been devised, with an all-electric option in development. Aiming to enter production soon, Hybrid Air Vehicles plans to have its first vehicles in the sky by 2024.