Editing Grumman E-2 Hawkeye (section)

==Design==
[[File:E2C-Hawkeye01.jpg|thumb|left|Like the earlier [[Grumman E-1 Tracer#Design and development|E-1 Tracer]], the E-2 uses the Grumman Sto-Wing [[folding wing]] system for carrier storage.]]

The E-2 is a high-wing airplane, with one [[Allison T56]] turboprop engine (5250 shp rating) on each wing<ref>{{cite web|url=http://miravim.org/avimlibrary/Manuals/Powerplant%20Manuals/Aircraft%20Propellers/Other%20Manufacturers/Rolls-Royce%20Allison%20T56%20Turns%2050.pdf|title=The Rolls-Royce Allison T56 is fifty|publisher=New Zealand Aviation News, September, 2004|access-date=2013-11-02|archive-url=https://web.archive.org/web/20141021001335/http://miravim.org/avimlibrary/Manuals/Powerplant%20Manuals/Aircraft%20Propellers/Other%20Manufacturers/Rolls-Royce%20Allison%20T56%20Turns%2050.pdf|archive-date=2014-10-21|url-status=dead}} Retrieved on 2 November 2013</ref> and retractable [[tricycle landing gear]]. As with all [[CATOBAR]] carrier-borne airplanes, the E-2 is equipped with a [[tailhook|tail hook]] for recovery (landing) and the nose gear can attach to a shuttle of the aircraft carrier's [[aircraft catapult|catapults]] for launch (takeoff). A distinguishing feature of the Hawkeye is its 24-foot (7.3 m) diameter rotating [[radar dome]] (rotodome) that is mounted above its fuselage and wings. This carries the E-2's primary [[antenna (radio)|antennas]] for its long-range [[radar]] and [[Identification friend or foe|IFF]] systems. No other carrier-borne aircraft possesses one of these. Land-based aircraft with rotodomes include the [[Boeing]] [[E-3 Sentry]], a larger [[Airborne early warning and control|AWACS]] airplane operated by the [[U.S. Air Force]] and [[NATO]] air forces in large numbers. The similarly placed stationary radome of the E-2's piston-engined predecessor, the [[Grumman E-1 Tracer#Design and development|E-1 Tracer]], also mandated the E-2's adoption of a modern version of the Grumman Sto-Wing [[folding wing]] system,<ref>{{cite web |url=http://www.aviation-history.com/grumman/f4f.html |title=The Aviation History Online Museum – Grumman F4F Wildcat |last1=Dwyer |first1=Larry |date=19 February 2014 |website=aviation-history.com |publisher=The Aviation History Online Museum |access-date=April 2, 2016 |quote=The F4F-4 was the first version of the Wildcat to feature a Grumman innovation, the ''Sto-Wing''. The ''Sto-Wing'' used a novel approach using a compound angle folding-wing that was unique to Grumman...It was a successful design that was later used on the F6F Hellcat and TBF Avenger. |archive-url=https://web.archive.org/web/20160405154049/http://www.aviation-history.com/grumman/f4f.html |archive-date=April 5, 2016 |url-status=dead}}</ref><ref>{{cite web |url=https://www.asme.org/getmedia/2d64abc8-3fa3-4d29-92d4-40db4777e8b2/238-Grumman-Wildcat-Sto-Wing-Wing-folding-Mechanism.aspx |title=WING-FOLDING MECHANISM OF THE GRUMMAN WILDCAT – An American Society of Mechanical Engineers Historic Mechanical Engineering Landmark |author=<!--Not stated--> |date=May 15, 2006 |website=asme.org |publisher=American Society of Mechanical Engineers |access-date=April 29, 2017 |quote=The innovative wing folding mechanism  STO-Wing), developed by Leroy Grumman in early 1941 and first applied to the XF4F-4 Wildcat, manufactured by the Grumman Aircraft Engineering Corporation, is designated an ASME Historic Mechanical Engineering Landmark. |archive-url=https://web.archive.org/web/20151021083204/https://www.asme.org/getmedia/2d64abc8-3fa3-4d29-92d4-40db4777e8b2/238-Grumman-Wildcat-Sto-Wing-Wing-folding-Mechanism.aspx |archive-date=October 21, 2015 |url-status=dead |df=mdy-all}}</ref> preventing the folded wing panels from making contact with the E-2's rotodome.<ref>{{cite web|url=http://www.thedrive.com/the-war-zone/25572/confessions-of-an-e-2c-hawkeye-radar-operator|title=Confessions Of An E-2C Hawkeye Radar Operator|last=Rogoway|first=Craig Picken and Tyler|website=The Drive|date=December 19, 2018 |access-date=2018-12-21|archive-url=https://web.archive.org/web/20181220161638/http://www.thedrive.com/the-war-zone/25572/confessions-of-an-e-2c-hawkeye-radar-operator|archive-date=December 20, 2018|url-status=live}}</ref>

The aircraft is operated by a crew of five, with the pilot and co-pilot on the flight deck and the combat information center officer, air control officer and radar operator stations located in the rear fuselage directly beneath the rotodome.{{citation needed|date=January 2013}}

In U.S. service, the E-2 Hawkeye provides all-weather [[airborne early warning]] and [[command and control (military)|command and control]] capabilities for all aircraft-[[carrier battle group]]s. In addition, its other purposes include sea and land [[surveillance]], the control of the aircraft carrier's fighter planes for [[air defense]], the control of strike aircraft on offensive missions, the control of search and rescue missions for [[naval aviator]]s and sailors lost at sea, relaying radio communications, air-to-air and ship-to-air. It can also serve in an [[air traffic control]] capacity in emergency situations when land-based ATC is unavailable.{{citation needed|date=January 2013}}

The E-2C and E-2D Hawkeyes use advanced electronic sensors combined with [[digital computer]] [[signal processing]], especially its radars, for early warning of enemy aircraft attacks and [[anti-ship missile]] attacks, controlling the carrier's [[combat air patrol]] (CAP) fighters, and secondarily for surveillance of the surrounding sea and land for enemy [[warship]]s and [[guided-missile]] launchers and any other electronic surveillance missions as directed.{{citation needed|date=January 2013}}