A Study on the Korea Weather Environment for Icing Airworthiness of Military Helicopter

Hur, Jangwook; Shin, Baekcheon

doi:2014.17.3.304

J. KIMS Technol > Volume 17(3); 2014 > Article

Journal of the Korea Institute of Military Science and Technology 2014;17(3):304-310.
DOI: https://doi.org/10.9766/KIMST.2014.17.3.304

A Study on the Korea Weather Environment for Icing Airworthiness of Military Helicopter

Jangwook Hur, Baekcheon Shin

¹Department of Intelligent Mechanical Engineering, National Kumoh Institute of Technology
²National Kumoh Institute of Technology

군용헬기 결빙 감항인증을 위한 국내 기상환경에 관한 연구

허장욱, 신백천

¹금오공과대학교 지능기계공학과
²금오공과대학교

Abstract

Based on atmosphere weather data by balloon in Osan and Gwangju area, if icing condition occurs in weather environment of altitude range where helicopter is operated was analyzed in quantitative way. Yearly icing occurrence frequency for daytime during recent three years was average 102 days in Osan, average 91 days in Gwangju. Icing weather environment to highly affect operation of helicopter varies a little according to analysis methods but icing intensity at MDT level was calculated in all the methods, and 14.5~38 times was suggested in Osan; 2.5~30 times in Gwangju. Icing at MDT level was calculated in common in all the analysis methods through wide periods such as Jan., Feb., Mar., and Nov. in Osan. In Gwangju, icing at MDT level was suggested focusing on Jan. only. Therefore, military helicopter developed in Korea is required to strive obtaining certificate of airworthiness about icing condition at MDT level for implementation of perfect operational mission and safe operation.

Key Words: Liquid Water Content, Dew Point Depression, Lapse Rate, Icing Intensity, Icing Frequency, Icing Airworthiness, Depletion Factor