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AMST Prototypes: YC-14 and YC-15
Official Designation YC-14
Primary Role STOL transport (prototype)
National Origin USA
Original Contractor Boeing
Operator United States Air Force
Wingspan 129 feet (39.32m)
Length 131 feet, 8 inches (40.15m)
Height at Tail 48 feet, 4 inches (14.71m)
Armament None
Engines Two General Electric CF6-50D turbofans
Thrust 51,000 pounds (227kN) per engine
Cruise Speed 449 mph (723km/h)
Max Speed 504 mph (811km/h)
Range 3,190 miles (5,134km)
Climb Rate 6,350 feet (1,935m) per minute
Service Ceiling 45,000 feet (13,716m)
Operating Weight 117,500 pounds (53,297kg)
Max Payload (STOL) 27,000 pounds (12,247kg) with airfield length less than 1,875 feet (571.5m)
Max Payload 81,000 pounds (36,741kg) or 150 troops
Max Takeoff Weight (STOL) 170,000 pounds (77,111kg)
Max Takeoff Weight 251,000 pounds (113,852kg)
Takeoff/Landing Distances Less than 2,000 feet (610m)
Basic Crew Three
Date Deployed August 1976
Production Two aircraft
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