The Kawasaki P-2J (originally P2V-Kai ) is a maritime patrol and ASW aircraft developed for the Japan Maritime Self-Defense Force . A twin turboprop-powered version of the radial-engined P-2 Neptune , the P-2J was developed as an alternative to buying the larger and more expensive P-3 Orion , which would eventually replace the P-2J in the 1980s.
6-744: The Kawasaki-built P-2J (originally P2V-Kai, where "Kai" (改) means modification) was the last version of the Neptune to be produced. Work on the P-2J was begun in 1961. The first P-2J, converted from a P2V-7 (P-2H) performed its initial flight on 21 July 1966, and the last of a further 82 production P-2Js was delivered in March 1979. The Wright radial engines of the Lockheed P-2s were replaced with 2,125 kW (2,850 HP) Ishikawajima-Harima T64-IHI-10 turboprop engines, using three-bladed propellers instead of
12-440: Is a free-turbine turboshaft engine that was originally developed for use on helicopters , but which was later used on fixed-wing aircraft as well. General Electric introduced the engine in 1964. The original engine design included technical innovations such as corrosion resistant and high-temperature coatings. The engine features a high overall pressure ratio , yielding a low specific fuel consumption for its time. Although
18-606: The Neptune in the ocean-patrol air fleets of the West. The last maritime reconnaissance squadron re-equipped with the Orion in 1993, but the P-2J remained in service for electronic reconnaissance and target support purposes. Data from Combat Aircraft since 1945 General characteristics Performance Armament Related development Aircraft of comparable role, configuration, and era Related lists Ishikawajima-Harima T64-IHI-10 The General Electric T64
24-505: The compressor is all-axial, like the earlier General Electric T58 , the power turbine shaft is coaxial with the HP shaft and delivers power to the front of the engine, not rearwards. Fourteen compressor stages are required to deliver the required overall pressure ratio. Compressor handling is facilitated by 4 rows of variable stators . Unlike the T58, the power turbine has 2 stages. Later versions of
30-418: The four-bladed units of late-model P-2s. The Ishikawajima-Harima J3-IHI-7C booster turbojets, produced 13.7 kN (3,085 lbf) thrust, giving the P-2J a top speed of 650 km/h (400 mph). The P-2J had accommodations for up to 12 crewmen. The forward fuselage was extended 4 feet 3 inches (1.30 m), with the tail surfaces being enlarged and their shape modified. AN/APS-80 search radar
36-483: Was fitted in a smaller radome. Updated avionics systems were installed, and these systems were much more compact than those used in other versions of the Neptune. The lighter avionics load permitted greater fuel capacity. The P-2J's main gear was fitted with two wheels each, rather than the one large wheel of the earlier models. The P-2J was phased out in the 1980s in favor of the P-3C Orion, which eventually replaced
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