At the Farnborough International Airshow, aircraft manufacturers like Airbus and Boeing are partnering with startups to explore alternative jet fuels, including biofuels made from waste sewage. While hydrogen is seen as a promising carbon-free fuel for aviation, challenges in storage and infrastructure remain. Startups are focusing on improving battery-powered aircraft for applications like air taxis and short-haul flights, with some companies retrofitting existing planes while others are designing new models. Hybrid flight solutions, combining internal combustion engines with electric propulsion, are emerging as a practical option for longer distances. Engineers are working on enhancing the power and efficiency of electric motors for aircraft, with research projects aiming to increase specific power output. The University of Nottingham is developing a modular drive unit for motors in a prototype hydrogen powertrain to improve power efficiency. The aviation industry is navigating a complex landscape of innovation and weight considerations as it strives towards more sustainable and efficient flight technology.