40ACS – 5 BHP Engines
The 40ACS engine is a state-of-the-art air-cooled Wankel rotary engine featuring our exclusive Compact SPARCS cooling technology.
Efficient and High-Performance
Unmatched Power-to-Weight Ratio
Engine Core Weight
- 4.4lb (2kg)
Engine Power Output
- 5BHP (3.7kW)
Multi Fuel
- AVGAS
Gasoline
JP8 / JP5 / Jet A-1
Time Between Overhaul
- 500+hrs
Power / Torque vs. RPM @WOT for 40ACS
| Displacement | 2.4 cu in (40cc) |
| Torque | 2.75 lb/ft @ 8000 rpm |
| Compression Ratio | 9.6:1 |
| Fuel Type | AVGAS / Gasoline / Heavy Fuels |
| Power Output | 5 bhp (3.7 kW) |
| Cooling | Air-Cooled Patented SPARCS |
| Ignition System | Single Spark Plug |
| Generator | Optional |
| Engine Control System | Full Electronic Engine Management |
| Oil System | Digitally Optimized Lubrication |
Innovative Power for Compact Systems
Lightweight, efficient and equipped with patented cooling technology, ensuring clean operation, high reliability, reduced maintenance, and extended lifespan.
Advantages of the 40ACS Wankel Rotary Engine
The Wankel rotary engine 40ACS stands out with a unique, simplified design, featuring fewer components than traditional reciprocating engines.
Power-to-Weight Ratio
Delivering high power in a lightweight package, the 40ACS excels in space-limited environments like UAVs and compact systems.
Compact Design
Fewer components mean a smaller, lighter engine that maximises power without taking up valuable space.
Clean Operation
With SPARCS cooling technology, the engine runs cleanly, with no oil ejection, reducing environmental impact and maintenance needs.
Multi-Fuel Capability
The 40ACS supports multiple fuel types such as gasoline, jp8,jp5 and Jet-A1, adding versatility for various applications while maintaining efficiency.
High Reliability
Fewer moving parts results in less wear, ensuring long-lasting reliability and lower maintenance
Efficient Cooling
Compact SPARCS technology optimises thermal management, keeping the engine cool and efficient even in demanding conditions
The 40ACS Wankel Rotary Engine: Unique and Simplified Design with Fewer Components
The 40ACS Wankel rotary engine boasts a unique, simplified design with minimal components, making it a compact and efficient choice for a wide range of applications.
Revolutionary Compact SPARCS Cooling Technology
Experience unmatched performance and efficiency with our patented Compact SPARCS cooling system—a breakthrough in rotary engine cooling technology. This sealed, self-pressurising system uses blow-by gases from the combustion process, which are continuously recirculated through the engine’s rotor and integrated intercooler. With Compact SPARCS technology, you get a powerful, efficient engine that operates cooler, cleaner, and more reliably.
Research publications about the AIE Wankel Rotary Engine
Engine Dimensions
“This engine will enable vision system UAS for new ISR capabilities in terms of long range and extended reach ISR missions.”
Dr. Gregory Minkiewicz
Small Scale Propulsion Lead, AFRL’s (US Air Force Research Laboratory)
A Cutting-Edge Engine for UAVs and UAS Applications
The 40ACS Wankel rotary engine is a powerful solution tailored for UAV propulsion. Its air-cooled, compact design ensures reliable performance in demanding aerial applications. Weighing less and offering a higher power-to-weight ratio than conventional engines, the 40ACS significantly extends UAV flight time while maintaining low vibration and operational efficiency. Equipped with AIE’s proprietary SPARCS cooling technology, it also supports multi-fuel use, making it adaptable to various UAV missions. The 40cc engine delivers 5 BHP, making it ideal for drones needing consistent, high power with minimal maintenance.
- Military RPAS/UAVs: Dependable power for mission-critical operations
- Mapping and Surveying: Accurate and efficient terrain mapping
- Agriculture: Precision farming and crop monitoring
- Disaster & Relief: Quick response for humanitarian aid and relief
- Surveillance: Long-endurance flights for security and monitoring
- Journalism: Capture clear aerial footage for news and media
- Construction: Efficient project monitoring and site mapping
- Scientific Research: Reliable data collection in remote environments
