North American A-5 Vigilante
[1] Development of the A-5 had started in 1954 as a private venture by NAA, who sought to produce a capable supersonic long-distance bomber as a successor to the abortive North American XA2J Super Savage.During the mid-1970s, the withdrawal of the type commenced after a relatively short service life, largely due to the aircraft being expensive and complex to operate, as well being a victim of post-Vietnam military cutbacks.During early 1954, the company embarked on a private study into a conceptual carrier-based, long-range, all-weather strike bomber, that would be capable of supersonic speeds while carrying a sizable payload.[2] In terms of its basic configuration, the conceptual aircraft featured twin-engines and high-mounted wing, as did the XA2J, but differed substantially by being highly swept and adopting jet propulsion.[3][6] This proposal, which was referred to the North American General Purpose Attack Weapon (NAGPAW) concept, was promptly evaluated by the United States Navy.[5] The service produced numerous challenging demands, including the somewhat contradictory necessity of both a high speed of Mach 2 and the ability to take off from an aircraft carrier at maximum weight with no head-wind, also known as wind-over-the-deck, to assist the take-off.[8] This took advantage of the zero-wind requirement's elimination to considerably increase the aircraft's maximum weight, the fuselage being redesigned with a hump back to accommodate additional fuel.The reconnaissance Vigilante weighed almost five tons more than the strike version with almost the same thrust and an only modestly enlarged wing, resulting in reduced acceleration and climb rate, though it remained fast in level flight.The use of aluminum-lithium alloy for wing skins and titanium for critical structures was also unusual for the era; other exotic materials included the use of a gold coating to reflect heat in key areas such as the bomb bay.[3][14] While the same engine was used by several other US military aircraft, such as the Convair B-58 Hustler and the McDonnell Douglas F-4 Phantom II, the powerplants used on the A-5 differed in some ways, such as the use of a somewhat uncommon air-impingement starter along with a single igniter.[12] Other elements of its avionics include a computerized AN/ASB-12 nav/attack system incorporating a head-up display ("Pilot's Projected Display Indicator" (PPDI), one of the first), multi-mode radar, radar-equipped inertial navigation system (REINS, based on technologies developed for North American's Navaho missile), closed-circuit television camera under the nose, and an early digital computer known as "Versatile Digital Analyzer" (VERDAN) to operate it all.While designated by the US Navy as a "heavy" aircraft, the A-5 was surprisingly agile; without the drag of bombs or missiles, even escorting fighters found that the clean airframe and powerful engines made the Vigilante very fast at high and low altitudes.[20] Although most of these reliability issues were eventually worked out as maintenance personnel gained greater experience with supporting these systems, the aircraft tended to remain a maintenance-intensive platform throughout its career.RVAH-3 continued to be responsible for the stateside-based RA-5C training mission of flight crews, maintenance and support personnel, while RVAH-1, RVAH-5, RVAH-6, RVAH-7, RVAH-9, RVAH-11, RVAH-12, RVAH-13 and RVAH-14 routinely deployed aboard Forrestal, Saratoga, Ranger, Independence, Kitty Hawk, Constellation, Enterprise, America, John F. Kennedy and eventually the Nimitz-class aircraft carriers to the Atlantic, Mediterranean and Western Pacific.[citation needed] Eight of ten squadrons of RA-5C Vigilantes also saw extensive service in the Vietnam War starting in August 1964, carrying out hazardous medium-level post-strike reconnaissance missions.The RF-8G version of the Vought F-8 Crusader, modified with internal cameras, had already been serving in two light photographic squadrons (VFP-62 and VFP-63) since the early 1960s, operating from older aircraft carriers unable to support the Vigilante.[25] An additional example of an A-5A destined for restoration as a museum aircraft, BuNo 146698, was destroyed when it was being relocated by Army helicopter from Naval Air Engineering Station Lakehurst, New Jersey to a new location.
Carrier-basedbomberReconnaissance aircraftManufacturerNorth American AviationUnited States Navyunification of Navy and Air Force designationsNorth American XA2J Super SavageDouglas A-3 SkywarriorreconnaissanceVietnam WarUSS Saratogajet propulsionBill Gunstonmaiden flightColumbus, OhioKorean Warnuclear weapondrop tanksside-looking airborne radarinfrared line scannerelectronic intelligenceclimb rateRoyal Australian Air ForceEnglish Electric CanberrasDassault Mirage IVBAC TSR-2General Dynamics F-111CTFX (F-111)Australian Governmentswept wingboundary-layer control systemroll controlaluminum-lithium alloytitaniumradomeGeneral Electric J79turbojetintake rampsConvair B-58 HustlerMcDonnell Douglas F-4 Phantom IIconstant-speed drivesalternatorshydraulicallyram air turbinefly-by-wirehead-up displayinertial navigation systemNavaho missileclosed-circuit televisiondigital computertandemejection seatsMk 28 bomblanding gearHeavy Attack Squadron ThreeNaval Air Station SanfordPort Columbus AirportNorth American T-2 BuckeyeT-39 SabrelinerOV-10 BroncoRobert McNamarasubmarine-launched ballistic missilesRVAH-1RVAH-5RVAH-6RVAH-7RVAH-9RVAH-11RVAH-12RVAH-13RVAH-14ForrestalSaratogaRangerIndependenceKitty HawkConstellationEnterpriseAmericaJohn F. KennedyNimitz-classMiG-21Operation Linebacker IITask Force 77Strategic Air CommandBoeing B-52 StratofortressBoeing KC-135naval air stationNaval Air Station Key WestF-14 TomcatS-3 VikingNaval Support Activity Mid-SouthNaval Air Station MemphisMilitary Aircraft Storage and Disposition CenterDavis-Monthan AFBVought F-8 CrusaderVFP-62VFP-63VMFP-3Tactical Airborne Reconnaissance Pod SystemBoeing F/A-18E/F Super HornetAIM-54 PhoenixUnited StatesNaval Air Station Cubi PointOlongapo CityZambalesPueblo Weisbrod Aircraft MuseumPueblo, ColoradoOrlando Sanford International AirportNaval Air Station Patuxent RiverLexington Park, MarylandNaval Air Engineering Station LakehurstPima Air & Space MuseumTucson, ArizonaDavis-Monthan Air Force BaseCarrier Air Wing 9TennesseeCarrier Air Wing 2FloridaCastle Air MuseumCastle Air Force BaseCaliforniaNaval Air Weapons Station China LakeUSS Ranger (CV-61)Glenville, New York