The SP-170 FI TS GEN propulsion system, manufactured by Sky Power, has successfully passed an extensive FAR33 endurance test, demonstrating its high reliability for use in unmanned aerial vehicles (UAVs).
The test was conducted on the company’s in-house test bench, where the motor was subjected to defined temperature and load cycles designed to simulate typical flight conditions. Over a total of 150 hours, specialists monitored all key parameters, including engine speed, telemetry data, fuel consumption, and environmental conditions.
The SP-170 FI TS GEN is a 170cc two-stroke boxer engine intended for UAV systems with a take-off weight between 55 and 85 kilograms. The engine is built on an architecture that combines high power density with durability and ease of maintenance. The company states the engine has demonstrated its reliability in a variety of environments, from maritime to desert conditions.
The test plan involved daily run times of approximately eight hours. After each test day, the engine underwent visual and functional checks using a standardized checklist to identify and address any deviations. After a break-in phase of approximately 30 to 40 hours, the engine completed the full 150-hour run without any issues. Following the test series, a detailed final inspection of all components confirmed the engine’s flawless condition.
The data collected during the test confirms the engine’s airworthiness in accordance with FAA standards and 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 also successfully passed a FAR33 endurance test.
