P-8I Multimission Maritime Patrol Aircraft, India
P-8I is a long-range, multimission maritime patrol aircraft manufactured by Boeing, for the Indian Navy. It is a variant of the P-8A Poseidon operated by the US Navy. P-8I is intended to replace the ageing fleet of Tupolev Tu-142 aircraft that are in service with the Indian Navy.
The P-8I aircraft was designed to protect the vast coastline and territorial waters of India. It can conduct anti-submarine warfare (ASW), anti-surface warfare (AsuW), intelligence, maritime patrol, and surveillance and reconnaissance missions.
Orders and deliveries of Boeing's aircraft
In January 2009, Boeing was selected by the Indian Government to supply eight P-8I maritime reconnaissance aircraft to the Indian Navy. The contract also includes an option for four P-8I aircraft. The Indian Navy is the first export customer for the aircraft.
The maiden flight of the first P-8I aircraft was made in September 2011. The official flight test programme of the aircraft began in July 2012. The second P-8I aircraft performed its first flight in the same month.
The first P-8I aircraft was delivered to the Indian Navy in December 2012. The remaining aircraft were delivered between 2013 and 2015.
The India's Cabinet Committee on Security (CCS) approved the acquisition of four additional Boeing P-8I aircraft in mid-2016.
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P-8I design and construction
The P-8I aircraft is based on the Boeing Next Generation 737-800 aircraft. The forward section of the under-fuselage houses an internal weapons bay. The wings are fitted with hardpoints for carrying air-to-surface missiles.
The aircraft has a length of 39.47m, wing span of 37.64m and a height of 12.83m. The maximum take-off gross weight of the P-8I is 85,139kg.
The P-8I aircraft are produced by a Boeing-led industry team, comprising CFM International, Northrop Grumman, Raytheon, Spirit AeroSystems, BAE Systems and GE Aviation. The aircraft are being built at Boeing's production facility in Renton.
The fuselage is built by Spirit AeroSystems in Wichita and shipped to Renton, for fabrication and final assembly. The flight testing of P-8I is conducted from Boeing Field in Seattle. The final design review was concluded in July 2010 and production of the P-8I began in December 2010. The final assembly of the first aircraft was completed in August 2011.
P-8I cockpit, avionics and weapons
The P-8I aircraft is manned by nine crew members. The cockpit is integrated with primary flight display, multifunction displays, identification friend or foe (IFF), flight management system and stores management system.
The aircraft is equipped with a CAE AN/ASQ-508A magnetic anomaly detection (MAD) system, APS-143C(V)3 multimode radar and a global version of the Raytheon APY-10 surveillance radar.
The APY-10 radar provides precise information in all-weather, day and night missions. The P-8I also integrates BEL Data Link II communications system, Avantel mobile satellite system and a speech secrecy system from Electronics Corporation of India (ECIL).
The internal weapons bay can house Mark 54 torpedoes, depth charges and free-fall bombs. The under-wing hardpoints can be armed with air-to-surface missiles.
In December 2010, India requested a sale of AGM-84L Harpoon Block II anti-ship missiles and associated equipment to equip its P-8I aircraft. The Harpoon Block II carries a 226kg blast / fragmentation warhead. It can be fired against land and sea targets.
Countermeasures of the Indian Navy aircraft
The countermeasures are provided by directional infrared countermeasures (DIRCM) system and the electronic support measures (ESM) system supplied by Northrop Grumman. The DIRCM can protect the aircraft from incoming infrared guided missiles.
Engines and performance
The P-8I aircraft is powered by two CFM56-7 engines supplied by CFM International, a joint venture between Snecma Moteurs and GE Electric. Each engine provides a take-off thrust of 27,300lb. The engines are equipped with a new-generation full authority digital engine control (FADEC) system.
The P-8I aircraft can fly at a maximum speed of 789km/h and can reach a maximum altitude of 12,496m. The aircraft has a maximum range of 2,222km with four hours on station.
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