North American A-5 Vigilante

History of the North American A-5 Vigilante

North American Aviation Group became a household name in the U.S. military aviation industry thanks to the contributions of the P-51 Mustang fighter jets and the B-25 Mitchell medium bomber family to World War II. The company won another gold medal with its F-86 Sabre jet fighter in the Korean War a war that became the scene of the first jet-to-jet showdown in military history.

During the 1950s, the company operated several notable programs, including its X-15 rocket-powered research aircraft and the powerful but discontinued XB-70 Valkyrie supersonic bomber. The XF-108 "Rapier" was a proposed interceptor design that was once considered a companion fighter to the XB-70.

Both the XB-70 and XF-108 efforts failed to meet the promise of mass production, although the XB-70 experienced longer flight times on research missions.

The XF-108 was of interest to the US Air Force due to its interception capabilities, which required a very fast aircraft with a high rate of climb to counter the threat of incoming Soviet bombers. After the program ended, North America redesigned the airframe, systems and weapons to attract the U.S.

Navy as a carrier-based, nuclear-capable, supersonic strike bomber. Preliminary design studies for the aircraft began in North America as early as 1953 as part of a private company program.

The nuclear payloads eventually approved for the A-5 included the Mk 27, B28 and B43 series of free-fall nuclear bombs. Two external hardpoints can also carry conventional loads, although this is a feature the aircraft has rarely used during its service life.

10 Vigilant Squadrons were formed throughout the life of the aircraft. The Prototype A was followed by the modified "A3J-2", which was reorganized in 1962 to become the "A-5B". 57 A-5A aircraft and 20 A-5B variants were eventually produced. Model B gains extended operating range with new internal fuel storage and two additional external mount points (four in total). The internal fuel tanks form a distinct "hump" along the rear ridge of the fuselage, making it easy to identify newer models in service.

The B model also includes blown leading edge flaps and reinforced landing gear components.

The fortunes of the A-5 (and other aircraft) changed as American war planners lost their need for high-flying, high-penetration nuclear bombers, especially as Soviet air defenses improved and the world focused Shift to intercontinental ballistic missiles (ICBMs) as the primary means of transport for nuclear weapons. Land-based launchers are now joined by submarines equipped with the ability to launch ICBMs underwater from anywhere in the world, leading many to believe that aircraft like the A-5 have little future value.

This shift resulted in a lower purchase price for the A-5, which was only 156. The first productions appeared from 1956 to 1963.

As the mission role diminished, the A-5 was reconsidered as a rapid reconnaissance platform, resulting in the designation "RA-5C" ("A3J-3P" prior to 1962). The modified aircraft consisted of 91 new-build airframes, 43 modified A-5A models, and 6 modified A-5B models. The RA-5C aircraft differed from its attack bomber origins by the addition of a characteristic wing area and the installation of a "multi-sensor" reconnaissance package under the fuselage. The unit provides the aircraft with SLAR (Side-Looking Airborne Radar) capability, as well as improved countermeasure support, ELINT (Electronic Intelligence) support, infrared (IR) and various camera systems.

The RA-5C was heavier than its original production form and lost some performance value, but retained its ammo carrying capacity and two crew members.

During the Vietnam War (1955-1975), 8 of the 10 established A-5 squadrons were forced into combat duty and began reconnaissance duty in August 1964. Speed ??and maneuverability are the aircraft's primary assets, although the low-to-mid-altitude operating environment leaves the A-5 vulnerable to ground threats and interceptions.

Eighteen RA-5Cs were shot down by the enemy during the war, and another nine were killed in accidents. These heavy losses forced the reopening of the A-5 production line, and between 1968 and 1970, the existing inventory was increased by 36 aircraft.

Although its wartime service record was considered poor, the aircraft was heavily used by war planners in combat environments for which it was never intended.

As the war ended, the A-5 series fell victim to the post-war crisis and made its final flight in November 1979 marking the end of its useful life. Its lackluster combat record and expensive maintenance program didn't prolong the career of this once-proud design. Its service as an attack aircraft was overshadowed by its status as an aerial reconnaissance platform, both roles soon being replaced by more modern, compact and cost-effective options - officially ending the A-5 Vigilante's reign .

The A-5 aircraft was once thought to be the NR-349 of the USAF's proposed Improved Manned Interceptor (IMI) program. This version will carry three GE J79 engines and six long-range AIM-54 "Phoenix" air-to-air missiles as its primary armament. The initiative ultimately failed.

Specification

Basic

Production

Roles

Dimensions

Weight

Performance

Performance

Armor

Changes