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Grumman A-6 Intruder / A2F Intruder

 

grumea6b
EA-6B

 

Tasked with finding and attacking targets under night or all weather conditions for the U.S. Navy/Marine Corps, A2F-1 Intruders were designed and developed by the Grumman Aerospace Corporation. The first trials aircraft flew on 19 April 1960 and eight YA2F-1 Intruder prototypes were delivered to the US Navy for evaluation, with original tilt able tailpipes and powered by two Pratt & Whitney J52-P-6 engines of 8500 lb.

 
The A2F-1 was designed to deliver nuclear or conventional weapons with great accuracy on targets that are completely obscured by bad weather or darkness. A digital integrated attack navigation system enables the pilot to set course for the target and then leave the aeroplane to fly itself. Two TV-type screens enable him to “see” the ground and target whatever the conditions. At the target the aircraft is capable of dropping its weapons and turn for home automatically.
 
The slightly swept tail surfaces have a variable incidence tailplane. Lateral control is by inset spoilers forward of the trailing edge flaps which extend over almost the full wing span. Full span leading edge flaps are fitted. The outer wings fold upward and inward for ship-board stowage. Sideways opening air-brakes are on each side of the rear fuselage. The tricycle undercarriage has twin nose-wheels and a single wheel on each main unit. The nosewheel retracts rearward and main units forward.

 

 Grum-A6-01
A2F-1 Intruder

 

The first US Navy attack squadron to receive the Grumman A-6A Intruder, VA-42, re-equipped with the type at Oceana NAS, Virginia, in 1963.

 

In August 1964 it was reported that South Africa, rebuffed by the US State Department in bid to buy Grumman Intruders because of its race policies, was buying British Buccaneers instead.


From the A-6A was evolved the initial EA-6A ECM version for the Navy, its potential such that an advanced ECM version was developed in late 1966.


A development contract was issued in autumn 1966 and the EA-6B Prowler is externally similar to basic A-6 except longer nose enclosing four-seat cockpit and large pod on fin. First flown on 25 May 1968, delivery of first 12 production aircraft started January 1971. The first flew with an ALQ-99 jamming system which has evolved from being able to cope only with individual emitters (EXCAP), through several emitters (ICAP), to groups of weapons systems such as an air defence complex (ICAP- 2). The last of 170 was delivered on 29 July 1991.

The Grumman EA-6B was the Navy's first aircraft to be purpose-designed and built for tactical electronic warfare, two of the crew being ECM officers to operate the airborne equipment which can detect, identify, locate, and jam the emissions of hostile radars.


Eight Prowlers were deliv-ered to the US Navy in 1986, and plans call for production of the current ICAP-2 (Improved Capability) EA-6B shipborne electronic warfare aircraft to continue until at least 1991. Earlier EA-6Bs are being upgraded to ICAP-2 standard, which includes power management, improved emitter identification and correlation, and better reliability and maintainability. The first ICAP-2 flew in June 1980. EA-6Bs can carry Harm anti-radiation missiles.

On 22 March 1974 Grumman flew the first A-6E TRAM version of the Intruder, this incor-porating a turreted electro-optical sensor package for the delivery of laser-guided weapons; the TRAM target recognition attack multi-sensor) added infra-red and laser equipment to the full A-6 avionics systems.


An advanced version of the Intruder subsonic all-weather carrier-borne strike aircraft, the A-6F, was scheduled to fly during 1987. Production deliveries were to begin in 1989, against US Navy/USMC requirements for 150 aircraft. A-6F improvements include a new Norden high-resolution synthetic-aperture radar, stand-off ASM, and AIM-120 Amraam/ AIM-9 Sidewinder AAM capability. The A-6F will be powered by two 40.07kN General Electric unreheated F404 turbofans, will have a new wing designed by the Boeing Military Airplane Company, and will be fitted with a new CRT- based cockpit and digital avionics. Much of the avionics being carried in five external pods.


The new Boeing wing, which is to be retro-fitted to all existing A-6E/KA-6Ds from 1987, will offer an 8,000hr service life. A-6E target recognition and attack multisensor (Tram) production continues, and 12 were delivered in 1986. The modification of earlier A-6Es to accept Tram turrets also progresses. The tram turret houses both a Flir system and a laser tracker/designator.


The KA-6D is a flight-refuelling tanker converted from the original A-6A Intruders or from older A-6Es.

 

Grumm-A6


A total of 482 A-6 were built.

 

Northrop Grumman undertook EA-6B Prowler remanufacturing,

 

Gallery

 

A2F-1
Engines: 2 x Pratt Pratt & Whitney J52-P-6, 8500 lb
Wingspan: 53 ft
Length: 53 ft 5 in
Height: 15 ft 1.75 in
Empty weight: 24,000 lb
MTOW: 54,000 lb
Max speed: 720 mph at SL
Max cruise: 685 mph at SL
Hardpoints: 4 wing, 1 fuselage

 

A-6
Engines: 2 x Pratt & Whitney J-52-P-8A, 41.3kN
Weight empty : 26008.0 lb / 11795.0 kg
Max take-off weight: 27500 kg / 60627 lb
Wingspan: 16.2 m / 53 ft 2 in
Length: 16.3 m / 53 ft 6 in
Height: 15.584 ft / 4.750 m
Wing area: 49.2 sq.m / 529.58 sq ft
Wing loading: 114.39 lb/sq.ft / 558.00 kg/sq.m
Max. speed: 1000 km/h / 621 mph
Cruise speed: 770 km/h / 478 mph
Ceiling: 12700 m / 41650 ft
Range w/max.fuel; 5000 km / 3107 miles
Crew: 2
Armament : 6804kg ext. (5 pt.)

EA-6A Prowler

KA-6D Intruder

A-6E Intruder
Engine: 2 x P&W J52-P-8A, 9,300lb turbojet.
Installed thrust (dry): 83 kN.
Span: 16.2 m.
Length: 16.7 m.
Wing area: 49.1 sq.m.
Empty wt: 12,000 kg.
MTOW: 26,580 kg.
Warload: 8165 kg.
Max speed: 1040 kph.
Initial ROC: 2300 m / min.
Ceiling: 12,950 m.
Fuel internal: 9030 lt.
Max range: 4399 km.
Air refuel: Yes.
Combat radius hi-lo-hi: 1415 km.

A-6F Intruder

EA-6B Prowler
Engine: 2 x P&W J52-P-408 turbojet, 11,200 lb thrust.
Installed thrust: 99.6 kN.
Span: 16.2 m / 53 ft 2 in
Length: 18.2 m
Wing area: 49.1 sq.m / 528.51 sq ft
Height: 5.0 m / 16 ft 5 in
Empty wt: 15686 kg / 34582 lb
MTOW: 26535-28655 kg / 58500 - 63174 lb
Max speed: 965 km/h / 600 mph
Cruise speed: 850 km/h / 528 mph
Initial ROC: 2540  m / min.
Ceiling: 11,600 m / 38050 ft
T/O run: 815 m.
Ldg run: 655 m.
Fuel internal: 8870 lt.
Range: 535 km.
Endurance: 1 hr loiter.
Range w/max.fuel: 4000 km / 2486 miles
Crew: 4

 

A2F-1
Engines: 2 x Pratt & Whitney J52-P-6, 8500 lb

 

grum-a6-ld

Grumman A-6 Intruder


grum-ea6b-ld

Grumman EA-6B Prowler

 

 

 

 

 


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