Currently, a team of researchers from leading Universities and Government funded research institutes in the Republic of Korea are working together to enable mixed operation of manned and civil unmanned aircraft in the Korean National Airspace by 2020. In this paper, impacts of the detection range and angle of a generic Detect-And-Avoid (DAA) system on DAA Well Clear (DWC) metrics are investigated. Recorded Automatic Dependent Surveillance-Broadcast (ADS-B) trajectory data within about 150 nautical miles from the Inha University are used, which includes Incheon International Airport (ICN) and Gimpo International Airport (GMP). Efforts are made to provide a guideline for acceptable detection range and detection angles with respect to the risk level that reflects the air traffic characteristics of the Republic of Korea. The analyses show that, with ±70° of detection azimuth, ±30° of detection elevation, and 56,000 ft of detection range, more than 99 % of the threats can be detected by either the ownship or the intruder.

This paper presents a detailed methodology for the analysis and optimization of electric propulsion systems, using comprehensive set of performance maps. By expressing critical performance metrics such as flight speed, climb rate, in addition to the component efficiencies as contour plots, this approach offers visual insights into the interactions of each component within the combined system. The methodology identified rotational speed and torque as the two common independent variables for computing efficiency maps for each component enabling unified approach for numerical solvers and visual validation of the solution within the multiple contour plots. A comparative analyses of different efficiency models are presented, complemented by experimental measurements to validate the proposed approach. The practical utility of this methodology is demonstrated through two specific use cases. In the first scenario, the optimal propeller is identified to achieve the maximum range for a given aircraft in a level flight. In the second scenario, a strategy involving repeated powered climbs and power-off glides is evaluated to determine its potential in further extending the flight range. In particular, the study shows that employing periodic flight strategies can enhance range as much as 40% compared to conventional approaches. The described methodology provides a robust framework applicable to the optimization of aircraft system, offering guidance for component selection and system integration, and mission strategies.