With restrictions as to what type of weapons development and exportation could occur in Japan during the immediate post-World War 2 decades, the island nation delivered few notable products to help stock its own "self-defense" army, navy, and air force services. As such, there stood heavy reliance on the United States military during the tumultuous Cold War period with the Soviet Union and its supporting nations. One of the more important indigenous programs to have had emerged from Japan became the Kawasaki "C-1" used to suffice a Japan Air Self-Defense Force (JASDF) requirement for a high-wing, short-field operations tactical military transport. First flight was achieved on November 12th, 1970 and the type formally introduced during December of 1974. Thirty-one were ultimately procured by the JASDF and have seen consistent service since.
Finalized aircraft featured a crew of five made up of two pilots, a loadmaster, flight engineers, and dedicated navigator. The aircraft exhibited an empty weight of 53,400lb with a Maximum Take-Off Weight (MTOW) nearing 85,320lb. The cargo hold held space for up to 60 infantry or 45 paratroopers, 36 medical litters with staff or palletized cargo as required. Power for the C-1 was through 2 x Mitsubishi (Pratt & Whitney) JT8D-M-9 turbofan engines developing 14,500lbf of thrust each. This provided a maximum speed of 500 miles per hour, a range out to 805 miles, and a service ceiling of 38,000 feet.
The three completed prototypes were designated as C-X (later XC-1) and these were followed by the definitive C-1/C-1A production models. The EC-1 (also C-1Kai) was a C-1 outfitted for the Electronic Warfare (EW) training role and the C-1FTB (an XC-1 prototype) was set aside as a testbed. The National Aerospace Laboratory (NAL) showcased a sole modified C-1 as the "Asuka" and used it in Short Take-Off and Landing (STOL) research.
Beyond these marks, the C-1 line was not expanded. There were proposed forms that fell to naught - an in-flight refueler, EW production quality forms, etc... The C-1 was also not sold abroad.
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None. Hold limited to cargo: 60 infantry, 45 airborne, 36 patient litters with staff or cargo pallets.
C-1 - Base Series Designation
XC-1 - Prototype Designation; three completed
C-1/C-1A - Basic transport variant
EC-1 - Electronic Warfare trainer platform
C-1FTB ("Flight Test Bed") - Development airframe
"Asuka" QSTOL ("Quiet Short Take-Off and Landing") - Test airframe by the National Aerospace Laboratory; fitted with 4 x FRJ710 turbofan engines; single example used.
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