915 iS is a turbocharged four-cylinder aircraft piston engine with electronic fuel injection and ignition. Its intercooler, reduction gearbox and electric starter form part of an integrated propulsion installation with combined liquid and air cooling.
The Rotax 915 iS A is a turbocharged four-cylinder, four-stroke aircraft piston engine made by BRP-Rotax. It is an aircraft combustion engine with electronic fuel injection and ignition, a propeller speed reduction gearbox, an intercooler and an electric starter, supplied as a complete powerplant. The product page covers the 915 iS A, 915 iSc A, iS C24 and iSc C24 versions; iS engines are ASTM compliant, while iSc engines are certified according to EASA CS-E.
The engine delivers 104 kW (141 hp) maximum power, with a maximum continuous power of 99.0 kW (135 hp) at 5500 rpm. Displacement is 1352 cm³ from four cylinders of 84.0 mm bore and 61.0 mm stroke. Performance varies with ambient temperature, altitude and general conditions. The maximum operating altitude is 23,000 feet, equal to 7,010.4 m. The time between overhaul is 1,200 hours.
The engine mass is 82.2 kg for the engine with propeller speed reduction gearbox (ratio 2.54, with overload clutch), turbocharger, intercooler and exhaust system. Further items are listed separately: the engine suspension frame at 2.0 kg, the external alternator at 3.0 kg, the air guide hood at 0.4 kg and the fuel pumps assembly at 1.6 kg. A mass budget for an installation should include these items as required. The gearbox allows a higher-speed engine to drive a propeller at lower speed.
The cooling system is combined: the four cylinders are liquid and air cooled. Lubrication is dry sump with forced circulation, a separate oil tank and hydraulic valve tappets that adjust automatically. Fuel injection and ignition are redundant and managed by an engine management system, which includes an eco mode. The permitted fuels are leaded, unleaded, AVGAS 100LL and Ethanol 10 grades with a minimum of MON 85 and RON 95 (AKI 91 minimum). The stainless steel exhaust is integral to the turbocharged layout.
On the electrical side, the electric starter is available for 12 or 24 volt systems, and the engine supports a 24 V power supply delivering up to 800 W. A customizable version is offered with neutral black covers and no logo branding.
The market is civil, and the engine is aimed at manned aircraft, particularly light fixed-wing types. Integrators of heavier unmanned aircraft who need a fuel-injected piston powerplant with redundant ignition can use the same figures when comparing it with other combustion engines in the directory.
Specifications
Specifications · 915 iS A aircraft combustion engine
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FeaturedCombustion engines
FeaturedCombustion engines
FeaturedCombustion engines
FeaturedCombustion engines
FeaturedCombustion engines
FeaturedCombustion engines
FeaturedCombustion engines
