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Initial Operational Capability (IOC): July 1976
Maiden Flight: October 1974
Total Production: 20
Origin: Japan
Corporations: ShinMaywa Industries
Parent System: US-1
Initial Operational Capability (IOC): July 1976
Maiden Flight: October 1974
Total Production: 38
Family Members: US-2
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Description: The ShinMaywa Industries US-1 amphibious aircraft program started in March 1973 as a search and rescue airplane for the Japanese Navy based on the PS-1 amphibious airplane. The US-1 major improvement compared with the PS-1 are legs to land on the ground for ambulance transportation while retaining the amphibious operation capability. The first US-1 test aircraft completed its maiden flight in October 1974. The first production US-1 Short Take Off and Landing (STOL) Search and Rescue amphibian was delivered to the Japanese Defense Agency in March 1975. The Japanese Maritime Self-Defense Force (JMSDF) forced its first US-1 search and rescue squadron in July 1976. These aircraft are only suitable for search and rescue (SAR) and medical evacuation missions.

The US-1 was renamed the US-1A STOL Search and Rescue amphibian in 1981. The 45-ton aircraft can transport up to 12 occupants and is powered by four T64-IHI-10J turboprop engines each rated at 3,400-hp of power. ShinMaywa Industries delivered a total of 20 US-1A amphibians to the Japanese Defense Agency by 2004.

US-1A Specifications

Crew: 2
Number of Engines: 4
Passengers: 10
Propeller Blades: 4
Height: 9.95 meter (392 inch)
Length: 33.2 meter (1,305 inch)
Wingspan: 33.5 meter (110 foot)
Max Power at TakeOff: 13,600 hp (10,146 kW)
Top Speed at High Altitude: 265 knot (490 kph)
Max Takeoff Weight: 45,000 kilogram (99,206 pound)
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

Operators & Related Equipment


Grand Total 201
Propulsion Systems
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