Additional radar risk-reduction flight tests using a modified Lockheed Martin NC-130H are planned later this year to support development of the US Navy's Northrop Grumman E-2D Advanced Hawkeye (AHE) airborne early-warning aircraft.
A new APY-9 radar developed by Lockheed and offering improved overland and littoral performance is at the heart of the E-2D. The radar combines mechanical rotation and electronic scanning, and uses a filtering technique known as space-time adaptive processing to overcome ground clutter.
Whereas the radar in the NC-130 testbed has a silicon-based transmitter, the APY-9 is silicon carbide-based, which will increase power and range over the E-2C's APS-145 radar, says Cdr Adam Ferriera, AHE integrated product team co-lead.
Two E-2D system development and demonstration aircraft are now in assembly at Northrop's St Augustine, Florida facility. The first is due to fly in the fourth quarter of next year, and will be used for flying qualities and performance testing. The second will be equipped with the full mission system.
The AHE features a glass cockpit, new mission computer and displays, fibre-optic data network, upgraded communications and digitally controlled engines. The fuselage and centre wing have also been redesigned to accommodate a higher operating weight.
The US Navy plans to buy 75 new-build AHEs to replace its E-2Cs, with the new type to enter service in 2012.
Source: Flight International
