C-17 Globemaster III Mission The C-17 Globemaster III is the most flexible cargo aircraft to enter the airlift force. The C-17 is capable of rapid strategic delivery of troops and all types of cargo to main operating bases or directly to forward bases in the deployment area. The aircraft can perform tactical airlift and airdrop missions and can transport litters and ambulatory patients during aeromedical evacuations. The inherent flexibility and performance of the C-17 force enhances the ability of the total airlift system to fulfill the worldwide air mobility requirements of the United States. The ultimate measure of airlift effectiveness is the ability to rapidly project and sustain an effective combat force close to a potential battle area. Threats to U.S. interests have changed in recent years, and the size and weight of U.S.-mechanized firepower and equipment have grown in response to the improved capabilities of potential adversaries. This trend has significantly increased air mobility requirements, particularly in large or heavy outsize cargo. As a result, newer and more flexible airlift aircraft are needed to meet potential armed contingencies, peacekeeping or humanitarian missions worldwide. The C-17 is capable of meeting today's demanding airlift missions. Features Reliability and maintainability are two outstanding benefits of the C-17 system. Current operational requirements impose demanding reliability and maintainability. These requirements include an aircraft mission completion success probability rate of 92 percent, only 20 aircraft maintenance man-hours per flying hour, and full and partial mission availability rates of 74.7 and 82.5 percent, respectively. The Boeing warranty assures these figures will be met. The C-17 measures 174 feet long (53 meters) with a wingspan of 169 feet, 10 inches (51.75 meters). The aircraft is powered by four Pratt & Whitney F117-PW-100 turbofan engines, which are based on the commercial Pratt and Whitney PW2040 used on the Boeing 757. Each engine is rated at 40,440 pounds of thrust and includes thrust reversers that direct air flow upward and forward to avoid ingesting dust and debris. Additionally, thrust reversers provide enough thrust to reverse the aircraft while taxiing backwards and create in-flight drag for maximum rate descents. The design characteristics give it the capability to operate into and out of short runways and austere airfields carrying large payloads. Maximum use has been made of commercial off-the-shelf equipment, including Air Force-standardized avionics. The aircraft is operated by a crew of three (pilot, co-pilot and loadmaster), reducing manpower requirements, risk exposure and long-term operating costs. Cargo is loaded onto the C-17 through a large aft ramp and door system that accommodates virtually all of the Army's air-transportable equipment such as a 69-ton M1 Abrams main battle tank, armored vehicles, trucks and trailers. Additionally, the cargo floor has rollers that can be flipped from a flat floor to accommodate wheeled or tracked vehicles to rollered conveyors to accommodate palletized cargo. The C-17 is designed to airdrop 102 paratroopers with their accompanying equipment. The maximum payload capacity of the C-17 is 170,900 pounds (77,519 kilograms), and its maximum gross takeoff weight is 585,000 pounds (265,352 kilograms). With a payload of 164,900 pounds (74,797 kilograms) and an initial cruise altitude of 28,000 feet (8,534 meters), the C-17 has an unrefueled range of approximately 2,400 nautical miles. Its cruise speed is approximately 450 knots (.74 Mach). The design of the aircraft (high-lift wing, slats, and externally blown flaps) allows it to operate through small, austere airfields. The C-17 can take off and land on runways as short as 3,500 feet (1,064 meters) and only 90 feet wide (27.4 meters). Even on such narrow runways, the C-17 can turn around using a three-point star turn and its backing capability. Background The C-17 made its maiden flight on Sept. 15, 1991, and the first production model was delivered to Charleston Air Force Base, now identified as Joint Base Charleston, S.C., on June 14, 1993. The first squadron of C-17s, the 17th Airlift Squadron, was declared operationally ready Jan. 17, 1995. The Air Force originally programmed to buy 120 C-17s. Due to the unrivaled success of the C-17 to accomplish various mobility missions, additional aircraft were acquired, resulting in a final fleet of 223 aircraft. The C-17 is operated by Air Mobility Command from Travis Air Force Base, California; Dover Air Force Base, Delaware; Joint Base Lewis-McChord, Washington; Joint Base Charleston, South Carolina; and Joint Base McGuire-Dix-Lakehurst, New Jersey. Pacific Air Forces operates C-17s from Joint Base Elmendorf-Richardson, Alaska, and Joint Base Pearl Harbor-Hickam, Hawaii. The Air National Guard operates C-17s from Jackson, Mississippi; Stewart Air National Guard Base, New York; Memphis, Tennessee; Martinsburg, West Virginia; and Charlotte, North Carolina. The Air Force Reserve Command operates C-17s at March Air Reserve Base, California; Wright Patterson Air Force Base, Ohio; and Pittsburgh Air Reserve Station, Pennsylvania. Air Force Materiel Command has one C-17 on loan from Joint Base Charleston, South Carolina, to conduct tests at Edwards Air Force Base, California. Air Education and Training Command performs C-17 aircrew training from Altus Air Force Base, Oklahoma. General Characteristics Primary Function: Cargo and troop transport Manufacturer: The Boeing Company Length: 174 feet (53 meters) Height: 55 feet 1 inch (16.79 meters) Wingspan: 169 feet 10 inches (to winglet tips) (51.75 meters) Cargo Compartment: Length: 88 feet (26.82 meters) Width: 18 feet (5.48 meters); Height: 12 feet 4 inches (3.76 meters) Power Plant: Four Pratt & Whitney F117-PW-100 turbofan engines Thrust: 40,440 pounds, each engine Maximum Takeoff Weight: 585,000 pounds (265,352 kilograms) Speed: 450 knots at 28,000 feet (8,534 meters) (Mach .74) Ceiling: 45,000 feet at cruising speed (13,716 meters) Range: Global with in-flight refueling Crew: Three (two pilots and one loadmaster) Aeromedical Evacuation Crew: A basic crew of five (two flight nurses and three medical technicians) is added for aeromedical evacuation missions. Medical crew may be altered as required by the needs of patients. Load: 102 troops/paratroops; 36 litter and 54 ambulatory patients and attendants; 170,900 pounds (77,519 kilograms) of cargo (18 pallet positions) Unit Cost: $202.3 million (fiscal 1998 constant dollars) Date Entered USAF Inventory: June 1993 Inventory: Active-Duty: 146; Air National Guard: 50; Air Force Reserves: 26 (Current as of April 2025)