Horizon Aircraft, a Canadian company, has revealed a collaboration with hydrogen propulsion developer ZeroAvia, although it does not alter the firm's focus on hybrid-electric power for its Cavorite X7 aircraft. CEO Brandon Robinson expressed a positive outlook towards ZeroAvia's engineering advancements, particularly highlighting the ZA600 fuel cell powertrain. While the X7 could potentially accommodate the powertrain, various technical obstacles, including decreased passenger capacity due to hydrogen storage tanks and challenges related to weight, drag, and fuel cost, must be resolved. The collaboration aims to explore hydrogen's potential benefits, especially in terms of longer range, but uncertainties remain regarding its implementation in the X7's hybrid-electric configuration. Horizon plans to conduct detailed engineering studies to assess the viability of hydrogen propulsion. Despite this collaboration, the company's primary focus remains on certifying and producing the Cavorite X7 with an expected completion timeline towards the end of the decade. Development work on the X7 continues, with ground tests and the maiden flight scheduled in the coming years, while ZeroAvia targets the certification of its ZA600 powertrain by 2026-2027. Although Horizon's main interest lies in hybrid-electric technology, the collaboration with ZeroAvia provides valuable insights into potential future pathways for the company's aircraft development.