The Rotax 912 iS2 engine is rated at 100 horsepower (HP) at 5,800 revolutions per minute (RPM), making it a robust and efficient option in the Rotax 912 series. Known for its modern design and electronic fuel injection system, Rotax 912 is2 the 912 iS2 stands out from its counterparts in terms of both performance and fuel efficiency.
Comparison with Other Rotax 912 Models
Rotax 912 UL: The 912 UL is the base model in the series, rated at 80 HP. It features a simpler carbureted fuel system compared to the 912 iS2. While it is lightweight and reliable, it lacks the advanced technology of the iS2, such as the electronic fuel injection. This results in slightly lower performance and fuel efficiency, making it more suited for ultralight aircraft or applications where cost is a significant consideration.
Rotax 912 ULS: The 912 ULS offers 100 HP, similar to the 912 iS2, but it uses a carbureted fuel system rather than electronic fuel injection. This means the ULS is less fuel-efficient, particularly at lower power settings or during long cruises. The ULS is popular for its simplicity and proven track record, but the iS2 outshines it with better fuel management, reduced emissions, and improved throttle response.
Rotax 912 iS: The original 912 iS model also delivers 100 HP and shares the same electronic fuel injection system as the iS2. However, the iS2 features incremental updates that improve reliability and optimize performance. These enhancements include improved system diagnostics, smoother engine operation, and minor refinements in the fuel injection mapping.
Key Advantages of the Rotax 912 iS2
The 912 iS2 is designed for efficiency and reliability, thanks to its advanced electronic engine management system. The electronic fuel injection provides precise fuel delivery based on operating conditions, resulting in better fuel economy compared to carbureted models. It also ensures consistent performance across various altitudes and temperatures, which is a significant advantage for pilots flying in diverse environments.
The iS2’s dual electronic control units (ECUs) provide redundancy, enhancing safety and reliability. This feature is particularly valued in the light-sport and ultralight aircraft community, where engine dependability is critical.
Applications
The 912 iS2’s 100 HP rating makes it versatile and well-suited for a wide range of light-sport, ultralight, and general aviation aircraft. Its power output allows for efficient climbs, good cruise speeds, and sufficient reserve power for emergency situations.
Conclusion
While the 912 iS2 shares the same 100 HP rating as the 912 ULS and 912 iS, its advanced electronic fuel injection system sets it apart. It offers superior fuel efficiency, smoother operation, and a more environmentally friendly footprint. These attributes make the Rotax 912 iS2 a premium choice within the 912 series, appealing to pilots and manufacturers prioritizing performance, reliability, and modern technology.
