For the Korea’s indigenously-developed rotary helicopter KUH-1’s verification of flight safety regarding anti-icing and de-icing under icing conditions, it was required to satisfy FAA’s safety regulations FAR-29 for the purpose of airworthiness certification. The airworthiness certification for military aircraft KUH-1 under icing condition was proceeded in 3-stages: data interpretation, flight test under natural icing condition and flight test under artificial icing condition. Generally, flight test verification for rotary wing under icing condition utilizes natural icing test and HISS (helicopter icing supply system) [1] that creates artificial cloud. Precise sensor CCP (cloud combination probe) is used to confirm major parameters of artificial icing condition, namely, LWC (liquid water content) and MVD (median volume diameter), and it was also confirmed that various methods of measurement should be utilized for the reasons of test conditions and margin of error on measuring equipment.

artificial icing flight trial, natural icing flight trial, anti-icing/de-icing verification system, LWC, MVD, CCP.