The Japan Defence Agency (JDA) is to begin detailed design work on an updated search-and-rescue (SAR) amphibian, having finally selected the Allison AE2100J turboprop engine for its planned improved development of the ShinMaywa US-1A.
JDA's Technical Research and Development Institute (TRDI), tasked with overseeing the programme, is expected to order two AE2100 shipsets by year-end. The engines will be used for static testing before installation on the first US-1A Kai "modified" prototype. The TRDI is seeking funding to order this in fiscal year 1999/00.
The selected engine is a 3,350kW (4,500shp) hybrid of the AE2100A powering the Saab 2000 and the D3 variant fitted to the Lockheed Martin C-130J. The AE2100J will feature a Lucas full authority digital engine control with modified software, a reinforced gearbox and machined casting and the C-130J's composite six-blade Dowty R414 propeller adopted for maritime operations.
Performance enhancing changes include replacing the US-1A's four General Electric T64-10J turboprops, adding a Kawasaki-developed fly-by-wire flight control system, new flat panel screen cockpit displays, a search radar, pressurised upper hull and composite wing structure .
The US-1 Modification Engineering Team is due to complete the first phase of detailed design and static testing by the end of 1999. A first flight is planned for 2002/3 but is dependent on JDA funding. The US-1A Kai faces a battle for funding, as Japan's three self-defence services jostle to include new programmes in the 2000-05 five-year defence plan.
The Japan Maritime Self-Defence Force wants to develop a new maritime patrol aircraft to replace the Kawasaki-built Lockheed P-3J, in addition to the US-1A. The Air Self-Defence Force is asking for a new C-X transport to replace the Kawasaki C-1, while the Ground Self-Defence Force is looking for a new AH-X attack helicopter.
Source: Flight International
