On January 22, 1953, Air Materiel Command (AMC) of the USAF issued a request for a Mutual Defense Assistance Program (MDAP) interceptor, in order to begin equipping NATO countries. Despite firm stipulations that the aircraft would have a two-man crew, North American looked to designing a simplified version of their F-86D, which would also incorporate fire control equipment in place of the still-secret Hughes E-4 system. This equipment, known as the MG-4 fire control system, was designed and built by North American's Electro-Mechanical Division at Downey, California.
The MG-4 was linked to an AN/APA-84 computer, which would provide intercept information to a cockpit mounted scope in the same manner as the F-86D. To give a back-up to this system, the aircraft would also mount an A-4 gun/bomb/rocket sight for manual control. North American's designers had no problems in modifying the design to accept the specified four 0.79 in (20 mm) cannon armament in place of the rocket system, but differences in weight between the two installations required an 8-inch (203 mm) forward fuselage extension to regain the center of gravity position.
In most other respects, the new aircraft, accepted by AMC as the F-86K, differed little from the F-86D, and was fitted with an afterburning J47-GE-33 engine of 7,650 lb (3,469 kg) st. Armament for production versions would be a group of four 0.79 in (20 mm) M-24A1 cannons with 132 rounds per gun, firing at 700 rounds per minute. The cannon armament was installed on either side of the cockpit, much the same as the day fighter F-86A/E/F installation. A new access panel was set into each side of the fuselage.
Fiat in Italy signed a license production agreement on May 16, 1953, under which F-86Ks would be built at the company's Turin-Caselle plant from US supplied components. Further to this agreement, on May 18, MDAP funds were committed for North American to supply 50 sets of F-86K parts under Contract AF-25402, signed on June 28, 1954. These aircraft would be assigned USAF s/ns, but after assembly they would wear Italian Matricola Militare (MM) s/ns.
During 1954, after much debate, the Dutch government resolved to use the North American F-86K Sabre as an all-weather fighter. A total of 62 of these machines were to be delivered under the MDAP. It was not a popular decision as many high-ranking politicians and air force officers had intensively lobbied for a two-seat all-weather fighter. The RNethAF (KLu - Koninklijke Luchtmacht) decided to equip three all-weather interceptor squadrons (No. 700, 701 and 702) with Sabres.
The first squadron, No. 700, was formed at Soesterberg on August 1, 1955. The Squadron's equipment consisted at that time of three Gloster Meteor T.Mk.7 trainers to keep aircrews current. 701 Squadron formed at Twenthe Airbase, close to Enschede at the German border, on 1 December, 1955. 702 Squadron was formed by disbanding the Woensdrecht based 328 Squadron and transferring its personnel to Soesterberg. During December 1955 the squadron transferred again to its final destination, Twenthe Airbase. The RNethAF consolidated its Sabre operations during 1959 with the transfer of 700 Squadron from Soesterberg to Twenthe Airbase.
The first fifteen North American-built F-86Ks arrived in Holland on 1 October, 1955 aboard USS Tripoli, and a further eight had been received by the end of the year. Following assembly and test flight, the initial pair of KLu Sabres, 54-1277 and 1278 were accepted by 702 Squadron on 8 December, 1955. A total of fifty-six North American-built F-86Ks were assigned to the KLu, with deliveries completed by April 1957. A further six Fiat-built machines were delivered in April and May 1957. Unable to create the ideal 25 aircraft squadron, the KLu decided to assign 19 F-86K to 700 and 701 Squadrons. 702 Squadron, officially established as the F-86K operational conversion unit on 1 January 1957, had an average strength of 16 machines, known affectionately as the Kaasjager (K-fighter).
The KLu F-86Ks were delivered in natural metal finish and initially carried RAF WW II style letter/number markings to denote squadron assignment. 700 Squadron aircraft carried '6A-' codes, 701 Squadron aircraft bore 'Y7-' and 702 Squadron 'ZX-' codes, each aircraft being then assigned an individual suffix number. In the early 'sixties, the KLu dropped this code system and assigned a single character type designation (Hawker Hunters got 'N', Republic F-84F Thunderstreaks got 'P' and so on) followed by a sequence number. The F-86Ks formed an exception as they carried a 'Q', followed by the last three digits of the USAF s/n.
Service life of the KLu F-86Ks was relatively short although from 1961 onwards, the aircraft were upgraded with Sidewinder launch rails and support gear. Thirteen F-86Ks were lost in flying accidents over the years. With the advent of the F-104 Starfighter the Sabre fleet began to wind down, and 702 Squadron, their training commitment complete, disbanded on 1 April, 1962. The surviving aircraft were mostly passed to the remaining squadrons, but starting 21 June, 1962, a number of high-time Sabres were permanently withdrawn from use and sent to Fiat for reconditioning. At that time it was thought that they would be passed on to the Turkish AF and a number of them have been noted parked in the Soesterberg dispersal area, re-painted in Turkish AF colours. In reality all these aircraft (up to ten) were instead assigned to the Italian AF.
During 1963 701 Squadron was the next unit to disband and 700 Squadron disbanded on 30 June, 1964. The F-86K was officially withdrawn from KLu service on 31 October, 1964. Many of the Sabre personnel converted to the F-104G Starfighter, but the old F-86K squadrons were never reactivated.
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all-weather interceptor
one 5,425 lb (2,461 kg) st General Electric J47-GE-17B jet engine
37 ft 1.3 in (11.31 m)
40 ft 11 in (12.47 m)
14 ft 11.9 in (4.57 m)
287.93 sq.ft (26.75 sq.m)
13,367 lb (6,063 kg)
18,380 lb (8,337 kg)
612 mph (985 km/h) at 40,000 ft (12,192 m)
12,000 ft (3,658 m)/min
744 mls (1,197 km) with two 120 US gal (454 l) drop tanks