Artificial and Natural Icing Tests of the UH-60A Helicopter Configured with the XM-139 Multiple Mine Dispensing System (VOLCANO)
Abstract:
A limited evaluation of the UH-60A helicopter with XM-139 Multiple Delivery Mine Dispensing System VOLCANO was conducted to determine the capability to operate safely in a moderate environment. Artificial and natural icing tests were conducted at Duluth, Minnesota from 10 January through 22 February 1988. Testing was conducted by the U.S. Army Aviation Engineering Flight Activity and consisted of 16.4 productive flight hours. One deficiency related to inadequate procedures in the operators and crewmembers checklist was identified. The checklist does not contain procedures to activate anti-icing systems. Two shortcomings were identified that involved the ice accretion characteristics of the VOLCANO. Ice accretion on the mounting hardware kit interferes with reinstalling the launcher rack jettison safety pins due to ice covering the safety pin holes. Ice accretion on the forward end of the launcher racks interferes with movement of the arming levers and locking levers to the safe and unlocked positions, respectively. The probability of damage to rotating components, due to impact with shed ice particles in descents is increased with the installation of the VOLCANO. The UH-60A helicopter with the VOLCANO system installed can safely operate in moderate icing conditions.