Hydroplane has achieved a significant milestone in the realm of hydrogen-powered rotorcraft flight by demonstrating full rotor flight speed on its hydrogen fuel cell powered rotor transmission test stand. This achievement, part of the XTech8 Phase 1 Small Business Innovation Research (SBIR) contract with the U.S. Army, validates the performance and mission relevance of Hydroplane's lightweight hydrogen fuel cell powerplant for vertical lift and extended-range UAV/UAS operations. Dr. Anita Sengupta, CEO of Hydroplane, highlighted the successful integration of the electric-propulsion system with a rotor transmission and a 23-foot rotor to achieve stable operation at flight-representative rotor speeds, bringing hydrogen-powered rotorcraft flight closer to reality. The company's hydrogen fuel cell powerplant is designed to replace internal combustion engines in various aircraft types, offering quiet operation, reduced thermal signature, and a scalable architecture that align with Department of Defense priorities for energy solutions in the battlespace. Additionally, Hydroplane's recognition includes winning the 2024 xTechSearch 8 competition for its mobile hydrogen-based energy storage concept and completing SBIR contracts with the U.S. Navy and Air Force under the Agility Prime initiative. Dr. Sengupta will further present Hydroplane's vertical lift developments at EAA AirVenture Oshkosh 2025, showcasing the company's continued advancements in hydrogen-powered rotorcraft flight.