Andrzej Jeziorski/SINGAPORE

The Japan Defence Agency's (JDA) Technical Research and Development Institute (TRDI) has laid out plans to develop indigenous replacements for ageing transport and maritime patrol aircraft (MPA).

TRDI says that early stages of development, in 2002-03, will focus on the design of common C-X transport and MPA sections - likely to be the tail and cockpit.

From 2003-2005, designers will focus on components specific to each type, with subsequent prototype production extending to 2007 for the MPA and 2008 for the C-X. The MPA will undergo engineering and operational testing from 2006 to 2009, while C-X testing will start in 2007, lasting until 2010.

The TRDI says the C-X will be a high-wing, twin-engine design with a rear ramp and glass cockpit. It will have a digital flight control system (FCS) and a Mach 0.8 cruise speed.

The MPA will be a low-wing, four-engine aircraft with a fly-by-light FCS to prevent electromagnetic interference. It will be fitted with an unspecified radar and sensor suite.

Between 20 and 50 C-Xs will replace Kawasaki C-1, Lockheed Martin C-130H Hercules and NAMC YS-11 transports. The JDA has previously specified turbofan powerplants for a higher cruise speed, twice the payload of a C-130 and providing sufficient range to reach Hawaii.

The MPA is intended as a replacement for over 100 Kawasaki-built P-3C Orions, with a potential volume of 80 aircraft.

The TRDI's announcement has sparked calls from Lockheed Martin for joint development with US industry. Chairman and chief executive Vance Coffman told Japanese reporters that he believes there is scope for Lockheed Martin participation.

Rival manufacturer Boeing has also been eyeing the programmes, and has been pushing its C-17 as a potential C-X.

Source: Flight International