Technical Specifications
Mechanical Parameters
Propulsion & Efficiency
Electrical & Interfaces
Platform & Protection
Product Overview
Aero-Engine 350cc is a new generation high-power boxer EFI piston engine, specifically developed to provide continuous, stable, and highly efficient thrust for 50 - 80 kg class medium-sized long-endurance vertical takeoff and landing (VTOL) composite-wing UAV systems and BVLOS tactical surveillance platforms.
As the core propulsion heart of long-endurance platforms, the crankshaft case and cylinders of Aero-Engine 350cc are fully precision-machined from aviation-grade high-strength aluminum alloy, with an excellent power-to-weight ratio. The cylinders adopt the classic horizontally opposed (Boxer) layout, providing impeccable symmetry and stability.
The system integrates altitude-adaptive Electronic Fuel Injection (EFI) technology, stably outputting 30 - 35 hp under wide temperatures from -30 °C to +50 °C and altitudes up to 4,000 m. The 15 L fuel tank, combined with high-efficiency propulsion, makes it an indispensable power center for 80 kg class long-range reconnaissance and emergency air-drop platforms.
Technical Features & Materials
Technical Features & Materials
Industrial medium-range penetration imposes strict indicators on engine energy efficiency, thermal degradation rate, and mechanical vibration. Aero-Engine 350 has undergone systematic optimization in intake and exhaust efficiency.
- Boxer low-vibration performance: The horizontally opposed piston design naturally cancels out the horizontal inertial forces generated by reciprocating motion, suppressing high-frequency mechanical vibration to a minimum. This effectively protects the high-precision EO/IR dual-axis tracking gimbals suspended under the fuselage, preventing high-frequency jitter in sensor imaging.
- High-efficiency EFI: The system adopts an altitude-adaptive Electronic Fuel Injection (EFI) system. It dynamically compensates the fuel-to-air ratio in real time based on high-altitude atmospheric pressure and ambient temperature, resulting in extremely low cruise fuel consumption. When paired with the AT50 platform, it achieves up to 4+ hours of continuous reconnaissance and air-drop endurance.
- Airtight dustproof & cooling cylinder heads: The full composite plenum shell is dustproof and waterproof, and the cylinder body surface is covered with dense alloy cooling fins. Combined with a heavy-duty air filter, it operates safely even under 12 m/s (Force 6) wind shear or sandstorms.
System Interfaces & Integration
System Interfaces & Integration
As a general medium-to-high power propulsion platform, Aero-Engine 350 has extremely rich and friendly system-level electrical connections and installation slides.
- CAN-bus telemetry & automatic control: The engine ECU module natively supports dual-channel CAN-bus and standard PWM commands. The flight control system can monitor precise cylinder temperature, crankshaft RPM, and real-time electrical output via MAVLink protocol, executing automatic engine start-stop during VTOL transitions.
- 1,000 W built-in starter-alternator: A brushless starter-generator system is highly integrated inside the engine, supporting “one-key remote cold start” in the field. During level flight, it automatically switches to power generation mode, continuously outputting a stable voltage of 1,000 W @ 28 V to avionics and the 14,000 mAh takeoff lithium battery pack, eliminating the need to carry extra generators.
- Heavy-duty vibration-dampened flange interface: The rear end is equipped with a standard aviation-grade thickened aluminum alloy flange plate, adapting to the tailcone mounting bracket of AT50 and other MTOW 50 - 80 kg class fixed-wing vehicles. High-elasticity rubber dampers filter out over 95% of engine torque stress, ensuring the longevity of the aerodynamic structure.
Installation & Maintenance SOP
Bolt Torque & Alignment Calibration
When the engine is mounted on the rear aircraft frame via the flange, the main fixing bolts must be tightened alternately with a recommended torque of 8.5 N·m. Use electronic measuring tools to confirm that the engine’s horizontal centerline aligns perfectly with the aircraft’s longitudinal axis.
EFI Fuel Injector Airtightness Check
Before the first takeoff or after long-term storage, an EFI injector pathway self-test must be executed via the GCS to ensure the fuel supply valve has no leaks or loose connections. Check the airtightness of the 12 L fuel tank to prevent flameout during high-altitude, high-speed cruise caused by fuel intake resistance.
Spark Plug & Air Filter Maintenance
Every 50 cumulative flight hours, ground crew must remove and clean the air filter element and remove carbon deposits on spark plug electrodes. Every 200 hours, a deep de-carbonization of the cylinder heads must be performed, and the rubber airtight gaskets replaced.
Wide-Temperature All-Weather Operational Safety Limits
Since the gas engine runs under high thermal radiation, ground warm-up test times should be limited to 5 minutes. Ground personnel are strictly prohibited from approaching the rotating area of the 14 - 16 inch propeller when the engine is powered on or running.
