The Huey was the most common utility helicopter used in Vietnam. The Huey could reach speeds of 150 miles per hour so it was perfect for evacuating soldiers. Also the Huey was able to fly low and make quick maneuvers, so it was good for flying in and out of combat. The special dual turbine engines were also built to function well in humid or cold climates, so they flew without problems in the hot, wet Vietnamese jungles. Over 10,000 Huey helicopters were used in Vietnam but hundreds were destroyed.