225ACS – Wankel Rotary Engine
Efficient 225ACS air-cooled Wankel engine with ultra-low oil demand and high performance.
High-Performance and optimised oil delivery
Unmatched Power-to-Weight Ratio
Engine Core Weight
- 25lb (11.3kg)
Engine Power Output
- 40BHP (30kW)
Multi Fuel
- AVGAS
Gasoline
JP8 / JP5 / Jet A-1
Time Between Overhaul
- 500+hrs
Power / Torque vs. RPM @WOT for 225ACS
| Engine Core Weight | 25 lb (11.3kg) |
| Displacement | 13.7 cu in (225cc) |
| Torque | 27 lb/ft @ 8000 rpm |
| Fuel Type | AVGAS / Gasoline / Heavy Fuels |
| Power Output | 40 bhp (30 kW) |
| Cooling | Air-Cooled Patented SPARCS |
| Ignition System | Twin Spark Plug / DI. |
| Generator | Optional |
| Engine Control System | Full Electronic Engine Management |
| Oil System | Digitally Optimized Lubrication |
Performance You Can Rely On
Designed for durability, the 225ACS features patented cooling and an optimized oil delivery system, offering lightweight, clean, and reliable performance with fewer repairs.
Advantages of the 225ACS Wankel Rotary Engine
The 225ACS air-cooled rotary engine combines a unique, simplified design and reduced components, setting a new standard for efficiency and reliability in compact engines.
Power-to-Weight Ratio
The 225ACS Wankel rotary engine delivers high power in a lightweight design, perfect for space-limited applications like UAVs and compact systems.
Compact Design
With fewer components, the 225ACS is smaller and lighter, maximising power while conserving space.
Clean Operation
SPARCS cooling technology ensures clean performance with no oil ejection, reducing environmental impact and maintenance.
Multi-Fuel Capability
The 225ACS supports fuels like petrol, JP8, JP5, and Jet-A1, offering versatility and efficiency.
High Reliability
Fewer moving parts mean less wear, ensuring durability, reliability, and minimal maintenance.
Efficient Cooling
Compact SPARCS technology enhances thermal management, keeping the engine cool and efficient in demanding conditions.
Revolutionary Compact SPARCS Cooling Technology
Discover unparalleled performance and efficiency with the patented Compact SPARCS cooling system—a revolutionary advancement in rotary engine technology. This sealed, self-pressurising system recirculates blow-by gases from the combustion process through the rotor and integrated intercooler. Compact SPARCS ensures the 225ACS operates cooler, cleaner, and more reliably, delivering exceptional power and efficiency.
Research publications about the AIE Wankel Rotary Engine
Engine Dimensions
“I am so pleased that we could revolutionise a small rotary engine design to run well on jet fuels. This engine can be used for multiple purposes, not just uncrewed aircraft systems.”
Dr. Mike Kweon
Program Manager (US Amy Research Lab)
A High-Performance Engine for UAVs and UAS Applications
The 225ACS Wankel rotary engine is a cutting-edge power solution designed specifically for UAV propulsion. With 40 BHP of output, this air-cooled, compact engine offers exceptional performance in demanding aerial applications. Its lightweight design and superior power-to-weight ratio enhance UAV endurance, extending flight times while reducing vibrations for smooth, efficient operation.
Equipped with AIE’s proprietary Compact SPARCS cooling technology, the 225ACS ensures optimal thermal management and supports multi-fuel use, making it versatile and adaptable for various UAV missions. Its reliable and low-maintenance design is ideal for applications requiring consistent, high power with minimal operational overhead.
- Military RPAS/UAVs: Trusted power for mission-critical operations
- Mapping and Surveying: Efficient and precise terrain mapping
- Agriculture: Advanced solutions for precision farming and crop monitoring
- Disaster & Relief: Rapid response for humanitarian and emergency needs
- Surveillance: Long-endurance flights for security and monitoring
- Construction: Streamlined project oversight and site mapping
- Scientific Research: Reliable performance in remote data collection
