The SP-170 FI TS GEN, a two-stroke boxer engine from Sky Power, has successfully completed a 150-hour endurance test in accordance with Federal Aviation Regulation (FAR) 33 standards.
The test, designed to simulate real-world flight conditions for unmanned aerial vehicles (UAVs), was conducted on the company’s in-house engine test bench. The motor operated under defined temperature and load cycles and was continuously monitored for all key parameters, including engine speed, telemetry data, fuel consumption, and environmental conditions.
The SP-170 FI TS GEN is a two-stroke boxer engine with a displacement of 170 cc and is designed for use in UAV systems with a take-off weight between 55 and 85 kilograms. The engine is built on a proven architecture that combines high power density with durability and ease of maintenance. The company states that the engine has already demonstrated its reliability in a variety of operating environments, ranging from maritime conditions to desert missions.
The test plan involved daily run times of approximately eight hours until the 150-hour duration was achieved. The SP-170 FI TS GEN completed the full 150-hour endurance run without any issues after a break-in phase of approximately 30 to 40 hours. After each test day, the engine underwent visual and functional checks using a standardized checklist to immediately identify and address any deviations. Upon completion of the test series, a detailed final inspection of all components confirmed the engine’s flawless condition.
The data collected not only confirms the engine’s airworthiness but also provides valuable insights into maintenance intervals, operating costs, and long-term performance. In addition to the SP-170 FI TS GEN, the single-cylinder SP-55 TS and the two-cylinder SP-110 FI TS GEN and SP-210 FI TS GEN engines have also successfully passed a FAR33 endurance test.
