Scott Hanko
Grumman E-2 Hawkeye
The Grumman E-2 Hawkeye is an American all-weather, aircraft carrier-capable tactical Airborne Early Warning (AEW) aircraft. This twin-turboprop airplane was designed and developed during the late 1950s and early 1960s by the Grumman Aircraft Company for the United States Navy as a replacement for the earlier E-1 Tracer, which was rapidly becoming obsolete. E-2 performance has been upgraded with the E-2B, and E-2C versions, where most of the changes were made to the radar and radio communications due to advances in electronic integrated circuits and other electronics. The fourth version of the Hawkeye is the E-2D, which first flew in 2007.
The E-2 also received the nickname "Super Fudd" because it replaced the E-1 Tracer "Willy Fudd". In recent decades, the E-2 has been commonly referred to as the "Hummer" because of the distinctive sounds of its turboprop engines, quite unlike that of turbojet and turbofan jet engines. The E-2 and its sister, the C-2 Greyhound, are currently the only propeller airplanes that operate from aircraft carriers. In addition to U.S. Navy service, smaller numbers of E-2s have been sold to the armed forces of Egypt, France, Israel, Japan, Singapore and Taiwan.
Continual improvements in airborne radars up through 1956 led to the construction of AEW airplanes by several different countries and several different armed forces. The functions of command and control and sea & air surveillance were also added. The first carrier-based aircraft to perform these missions for the U.S. Navy and its allies was the Douglas AD Skyraider, which was replaced in US Navy service by the Grumman E-1 Tracer, which was a modified version of the S-2 Tracker twin-engined anti-submarine warfare aircraft, where the radar was carried in an aerofoil-shaped radome carried above the aircraft's fuselage. The E-1 was utilized by the U.S. Navy from 1958 to 1977.
In 1956, the U.S. Navy developed a requirement for an airborne early warning aircraft where its data could be integrated into the Naval Tactical Data System aboard the Navy's ships, with a design from Grumann being selected to meet this requirement in March 1957. Its design, initially designated W2F-1, but later redesignated the E-2A Hawkeye, was the first carrier plane that had been designed from its wheels up as an AEW and command and control airplane.
The first prototype, acting as an aerodynamic testbed only, flew on 21 October 1960, with the first fully equipped aircraft following on 19 April 1961. The E-2A entered U.S. Navy service on January 1964, April 1964 with VAW-11 at North Island NAS. The first deployment was aboard the USS Kitty Hawk (CVA-63) during 1965.
The E-2 is a high-wing airplane, with one turboprop engine in each wing, and tricycle landing gear. As with all carrier-borne airplanes, the E-2 is equipped with a tail hook for landings, and it is capable of using the aircraft carrier's catapults for take-off. A distinguishing feature of the Hawkeye is its 24-foot (7.3 m) diameter rotating dome that is mounted above its fuselage and wings. This carries the E-2's primary antennas for its long-range radars. No other carrier-borne aircraft possesses one of these, and among land-based aircraft, they are mostly seen atop the Boeing's E-3 Sentry, a larger AEW airplane operated by the U.S. Air Force and NATO in large numbers.
In U.S. service, the E-2 Hawkeye provides all-weather airborne early warning and command and control capabilities for all aircraft-carrier battle groups. 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 aviators and sailors lost at sea, and for the relay of radio communications, air-to-air and ship-to-air.
The original E-2C, known as the Group 0, became operational in 1973, and it has undergone several upgrade programs during the decades since. The first of these was the E-2C Group I which replaced the E-2's older APS-125 radar and T56-A-425 turboprops with their improvements, their APS-139 radar systems and T56-A-427 turboprops. This version of the E-2 was followed within a few years by the more-improved Group II of the E-2C, which had the better APS-145 radar. The Group II has been incrementally upgraded with new navigational systems, better situational displays, and computerized electronics, culminating in the E-2C Hawkeye 2000 variant (sometimes called the Group III, although this term is no longer used as an official designation).
The E-2C and E-2D Hawkeyes use advanced electronic sensors combined with digital computerized signal processing especially its radars for early warning of enemy aircraft attacks and anti-ship missile attacks, and the control of the carrier's combat air patrol (CAP) fighters, and secondarily for surveillance of the surrounding sea and land for enemy warships and guided-missile launchers, and any other electronic surveillance missions as directed by the battle group's admiral in charge, or the captain of the aircraft carrier.
The Hawkeye 2000 features the APS-145 radar with a new mission computer and CIC (Combat Information Center) workstations (Advanced Control Indicator Set or ACIS), and carries the U.S. Navy’s new CEC (cooperative engagement capability) data-link system. It is also fitted with a larger capacity vapor cycle avionics cooling system. A variant of the Group II with the upgrades to the mission computer and CIC workstations is referred to as the MCU/ACIS. All Group II aircraft have had their 1960s vintage computer-processors replaced by a mission computer with the same functionality but built using more modern computer technology. This is referred to as the GrIIM RePr (Group II Mission Computer Replacement Program, pronounced "grim reaper"). In 2007 and 2008 a hardware and software upgrade package is being added to Hawkeye 2000 aircraft that allows faster processing, double current trackfile capacity, and access to satellite information networks. Hawkeye 2000 cockpits are also being upgraded to include solid-state glass displays, upgraded weather detection systems, and GPS-approach capability. Tests of the refueling modifications are also being carried out.
USS Midway Aircraft Carrier CV-41 Museum-San Diego Ca.
Grumman E-2 Hawkeye
The Grumman E-2 Hawkeye is an American all-weather, aircraft carrier-capable tactical Airborne Early Warning (AEW) aircraft. This twin-turboprop airplane was designed and developed during the late 1950s and early 1960s by the Grumman Aircraft Company for the United States Navy as a replacement for the earlier E-1 Tracer, which was rapidly becoming obsolete. E-2 performance has been upgraded with the E-2B, and E-2C versions, where most of the changes were made to the radar and radio communications due to advances in electronic integrated circuits and other electronics. The fourth version of the Hawkeye is the E-2D, which first flew in 2007.
The E-2 also received the nickname "Super Fudd" because it replaced the E-1 Tracer "Willy Fudd". In recent decades, the E-2 has been commonly referred to as the "Hummer" because of the distinctive sounds of its turboprop engines, quite unlike that of turbojet and turbofan jet engines. The E-2 and its sister, the C-2 Greyhound, are currently the only propeller airplanes that operate from aircraft carriers. In addition to U.S. Navy service, smaller numbers of E-2s have been sold to the armed forces of Egypt, France, Israel, Japan, Singapore and Taiwan.
Continual improvements in airborne radars up through 1956 led to the construction of AEW airplanes by several different countries and several different armed forces. The functions of command and control and sea & air surveillance were also added. The first carrier-based aircraft to perform these missions for the U.S. Navy and its allies was the Douglas AD Skyraider, which was replaced in US Navy service by the Grumman E-1 Tracer, which was a modified version of the S-2 Tracker twin-engined anti-submarine warfare aircraft, where the radar was carried in an aerofoil-shaped radome carried above the aircraft's fuselage. The E-1 was utilized by the U.S. Navy from 1958 to 1977.
In 1956, the U.S. Navy developed a requirement for an airborne early warning aircraft where its data could be integrated into the Naval Tactical Data System aboard the Navy's ships, with a design from Grumann being selected to meet this requirement in March 1957. Its design, initially designated W2F-1, but later redesignated the E-2A Hawkeye, was the first carrier plane that had been designed from its wheels up as an AEW and command and control airplane.
The first prototype, acting as an aerodynamic testbed only, flew on 21 October 1960, with the first fully equipped aircraft following on 19 April 1961. The E-2A entered U.S. Navy service on January 1964, April 1964 with VAW-11 at North Island NAS. The first deployment was aboard the USS Kitty Hawk (CVA-63) during 1965.
The E-2 is a high-wing airplane, with one turboprop engine in each wing, and tricycle landing gear. As with all carrier-borne airplanes, the E-2 is equipped with a tail hook for landings, and it is capable of using the aircraft carrier's catapults for take-off. A distinguishing feature of the Hawkeye is its 24-foot (7.3 m) diameter rotating dome that is mounted above its fuselage and wings. This carries the E-2's primary antennas for its long-range radars. No other carrier-borne aircraft possesses one of these, and among land-based aircraft, they are mostly seen atop the Boeing's E-3 Sentry, a larger AEW airplane operated by the U.S. Air Force and NATO in large numbers.
In U.S. service, the E-2 Hawkeye provides all-weather airborne early warning and command and control capabilities for all aircraft-carrier battle groups. 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 aviators and sailors lost at sea, and for the relay of radio communications, air-to-air and ship-to-air.
The original E-2C, known as the Group 0, became operational in 1973, and it has undergone several upgrade programs during the decades since. The first of these was the E-2C Group I which replaced the E-2's older APS-125 radar and T56-A-425 turboprops with their improvements, their APS-139 radar systems and T56-A-427 turboprops. This version of the E-2 was followed within a few years by the more-improved Group II of the E-2C, which had the better APS-145 radar. The Group II has been incrementally upgraded with new navigational systems, better situational displays, and computerized electronics, culminating in the E-2C Hawkeye 2000 variant (sometimes called the Group III, although this term is no longer used as an official designation).
The E-2C and E-2D Hawkeyes use advanced electronic sensors combined with digital computerized signal processing especially its radars for early warning of enemy aircraft attacks and anti-ship missile attacks, and the control of the carrier's combat air patrol (CAP) fighters, and secondarily for surveillance of the surrounding sea and land for enemy warships and guided-missile launchers, and any other electronic surveillance missions as directed by the battle group's admiral in charge, or the captain of the aircraft carrier.
The Hawkeye 2000 features the APS-145 radar with a new mission computer and CIC (Combat Information Center) workstations (Advanced Control Indicator Set or ACIS), and carries the U.S. Navy’s new CEC (cooperative engagement capability) data-link system. It is also fitted with a larger capacity vapor cycle avionics cooling system. A variant of the Group II with the upgrades to the mission computer and CIC workstations is referred to as the MCU/ACIS. All Group II aircraft have had their 1960s vintage computer-processors replaced by a mission computer with the same functionality but built using more modern computer technology. This is referred to as the GrIIM RePr (Group II Mission Computer Replacement Program, pronounced "grim reaper"). In 2007 and 2008 a hardware and software upgrade package is being added to Hawkeye 2000 aircraft that allows faster processing, double current trackfile capacity, and access to satellite information networks. Hawkeye 2000 cockpits are also being upgraded to include solid-state glass displays, upgraded weather detection systems, and GPS-approach capability. Tests of the refueling modifications are also being carried out.
USS Midway Aircraft Carrier CV-41 Museum-San Diego Ca.