Cranfield University has put forward a proposal to transform a Lockheed Martin C-130J Hercules aircraft into a testbed for evaluating hydrogen propulsion technologies in the UK. By leveraging the four-turboprop configuration of the C-130J, the initiative aims to conduct in-flight testing to enhance the understanding and capabilities of hydrogen propulsion. This conversion project underscores a strategic move towards exploring sustainable and innovative solutions for the aviation sector. The proposal signifies a proactive step towards advancing the development and integration of hydrogen-based technologies in the aerospace industry. By utilizing the C-130J as a demonstrator platform, researchers and engineers can assess the performance, efficiency, and viability of hydrogen propulsion systems. This approach aligns with the industry's pursuit of greener and more sustainable aviation solutions. Furthermore, the project highlights a commitment to identifying and nurturing technologies with significant strategic importance for the future of aviation, aerospace, and defense sectors. Cranfield University's proposal signifies a positive outlook on the potential of hydrogen propulsion and its role in shaping the future of flight. Through this endeavor, the aim is to drive innovation, research, and collaboration towards a more environmentally friendly and technologically advanced aviation landscape.