"U.S. Air Force RQ-4 Global Hawk UAVs operating in the Middle East have a unique heat problem. Being relatively small, unmanned, aircraft, they do not have industrial strength air conditioning for their electronic systems. There are a lot of electronics on this bird, most of them spy satellite grade sensors. These things are built to operate a high altitudes where it is very cold, very much below freezing. But on the ground in the Persian Gulf, just taxiing from an air-conditioned hanger to the runway and takeoff, and even doing this at night, can allow the electronics to heat up enough for some of fail. Take-offs have been aborted because within a space of ten minutes or so, the hot outside temperature, and all those electronics took the internal temperature of the aircraft to over 40 degrees Celsius. One key component fails, and the UAV aborts the take off."
Read more at Hosing Down Hot UAVsPosted by Darren at September 7, 2007 11:07 PM | More from UAV News |