The TIM-D55 hybrid VTOL fixed-wing UAV adopts a design that integrates four-rotor vertical takeoff and landing with a gasoline-powered tail pusher for level flight, combining the flexibility of VTOL with the long endurance and high-speed flight advantages of fixed-wing aircraft. The airframe is manufactured using a carbon fiber integral molding process, offering high strength and light weight. With a maximum payload of 45 kg (including fuel), it achieves an endurance of over 300 minutes under a 25 kg load, and a maximum range exceeding 1,000 km under a light load of 1.2 kg. Its optimized aerodynamic configuration and ample payload space support the integration of diverse mission equipment, making it suitable for large‑area mapping, long‑range reconnaissance, emergency supply delivery, and other long‑endurance, large‑scale operation scenarios.