How much torque does a Rotax 915 iS have?
Rotax performance is listed as: 141 hp @5,800 rpm and 328 ftlb of torque at the propeller. Based on the proven concept of the Rotax 912 / 914 engine series, the Rotax 915 iS engine offers more power, the best power-to-weight ratio in its class, full take-off power up to at least 15,000 feet (4,570 m) and a service ceiling of 23,000 feet (7,010 m).rotax engines are famous for their reliability and best-in-class power-to-weight ratio. Versatile, cost-efficient, and easy to use and maintain, rotax engines have gained the trust of flight schools, home builders, and aircraft manufacturers alike.Rotax is the brand name for a range of internal combustion engines developed and manufactured by the Austrian company BRP-Rotax GmbH & Co KG (until 2016 BRP-Powertrain GmbH & Co. KG), in turn owned by the Canadian Bombardier Recreational Products (BRP).
What is the cruise rpm of the Rotax 915?
Like all of Rotax’s four-cylinder aircraft engines, the 915 iS relies on small displacement (82 cubic inches) and high RPM—4800 RPM in cruise. The newer 916iS—nicknamed “The Impossible Engine”—delivers 19 more horsepower, a 2000-hour TBO (vs 1200 on the 915iS), and better fuel efficiency while adding only about eight pounds. Inside, it’s almost a new engine, with redesigned internals, upgraded systems, and its own synthetic oil.The 916iS has a stronger crankshaft, better cooling, and uses special synthetic oil. It costs more to buy but saves money over time because it lasts longer. If you want proven technology and lower upfront cost, choose the 915iS. If you want maximum takeoff power and the longest time between overhauls, choose the 916iS.