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Rotary wing aircraft, were first used by the Air Force while it was
still tied to the Army as the Army Air Forces. The helicopter's first
use was Combat Search and Rescue (CSAR). The first operational
helicopter was the Sikorsky R-4B "Hoverfly", which served as a CSAR
platform during the Second World War. The R-4 made its maiden flight on
January 13, 1942, the AAF ordered 30 R-4s for evaluation purposes. Of
these 30, one went to Burma and one to Alaska, while several others were
assigned to the U.S. Navy, U.S. Coast Guard and British Royal Navy. They
showed such promise that the AAF then ordered 100 R-4Bs. The R-4B was
first used in combat in May 1944. In a letter to a friend, Col. Philip
G. Cochran, Commanding Officer (CO) of the 1st Air Commando Group, wrote
"Today the 'egg-beater' went into action and the damn thing acted like
it had good sense."-- USAF Museum
The MH-60G's primary wartime missions are infiltration, exfiltration and resupply of special operations forces in day, night or marginal weather conditions. Other missions include combat search and rescue. The MH-60G is equipped with an all-weather radar which enables the crew to avoid inclement weather. To extend their range, Pave Hawks are equipped with a retractable in-flight refueling probe and internal auxiliary fuel tanks. Pave Hawks are equipped with a rescue hoist with a 200-foot (60.7 meters) cable and 600-pound (270 kilograms) lift capacity. All MH-60G's have an automatic flight control system to stabilize the aircraft in typical flight altitudes. They also have instrumentation and engine and rotor blade anti-ice systems for all-weather operation. The non-retractable landing gear consists of two main landing gears and a tail wheel. Aft sliding doors on each side of the troop and cargo compartment allow rapid loading and unloading.
The MH-53J's mission is to perform low-level, long-range, undetected penetration into denied areas, day or night, in adverse weather, for infiltration, exfiltration and re-supply of special operations forces. The MH-53J Pave Low III heavy-lift helicopter is the largest and most powerful helicopter in the Air Force inventory, and the most technologically advanced helicopter in the world. Its terrain-following, terrain-avoidance radar and forward-looking infrared sensor, along with a projected map display, enable the crew to follow terrain contours and avoid obstacles, making low-level penetration possible. The helicopter is equipped with armor plating, and a combination of three 7.62mm mini-guns or .50 caliber machine guns. It can transport 38 troops or 14 litters and has an external cargo hook with a 20,000-pound (9,000-kilogram) capacity. The MH-53J has twin turbo-shaft engines; self-lubricating, all-metal main and tail rotors; and a large horizontal stabilizer on the tail rotor pylon's right side.
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