The Black Hawk is the US Army's most important utility helicopter used for air assault, air cavalry, and aeromedical evacuation units. The aircraft is comprised of a four-bladed, twin-engine, medium-lift utility system widely used by the United States Army's Utility Tactical Transport Aircraft System (UTTAS). It can carry 11 combat-loaded, air assault troops, and has a cargo hook that can lift 30 rounds of ammunition, or a terrain vehicle like the Humvee. The Black Hawk can also be configured to carry out medical evacuation, command-and-control, search-and-rescue, armed escort, electronic warfare and executive transport missions. The Chinook helicopter is a versatile, twin-engine, tandem rotor heavy-lift aircraft. It has a top speed of 170 knots (196 mph, 315 km/h), and was the fastest contemporary utility and attack helicopter of the 1960s. It is one of the few aircraft of that era that is still in production and front line service. Its primary roles include troop movement, artillery emplacement and battlefield resupply. It has a wide loading ramp at the rear of the fuselage and three external-cargo hooks. Today, the Chinook remains the heaviest lifting helicopter used by its largest operators, the US Army and the Royal Air Force. Get tickets to the 2010 Duluth Air Show today! Read about other performers: · Canadian Forces Skyhawks · F-4 Phantom Heritage Flight · US Navy F/A-18