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The North American Aviation T-6

12 Feb 2018

The North American Aviation T-6 Texan, or Harvard as it’s known in The Commonwealth countries including South Africa, is an American single-engine advanced trainer aircraft used to train pilots of the United States Army Air Forces (USAAF), United States Navy, Royal Air Force, and other air forces of the British Commonwealth during World War II and into the 1970s.

The first Harvards arrived in South Africa in October 1942 for use by the Joint Air Training Scheme schools. By July 1944, 633 Harvard Mk IIA and III aircraft had been shipped to South Africa, with 555 surviving in October 1945. As the Harvards had been supplied on lend-leaseby the US, 300 were shipped back to the UK from 1946, with the remainder being purchased by South Africa. 65 AT-6Ds (7634 to 7698) and 30 T-6Gs (7699 to 7728) were purchased from the USA during 1952-1956.

The United States Army Air Corps (USAAC) and USAAF designated it as the AT-6, the United States Navy the SNJ, and British Commonwealth air forces the Harvard, the name by which it is best known outside the US. Starting in 1948, the new United States Air Force designated it the T-6, with the USN following in 1962. It remains a popular warbird aircraft used for airshow demonstrations and static displays.

It has also been used many times to simulate various Japanese aircraft, including the Mitsubishi A6M Zero in movies depicting World War II in the Pacific. A total of 15,495 T-6s of all variants were built.

Mitsubishi A6M Zero Replica

The Texan originated from the North American NA-16 prototype (first flown on April 1, 1935) which, modified as the NA-26, was submitted as an entry for a USAAC "Basic Combat" aircraft competition in March 1937. The first model went into production and 180 were supplied to the USAAC as the BC-1 and 400 to the RAF as the Harvard I. The US Navy received 16 modified aircraft, designated the SNJ-1, and a further 61 as the SNJ-2 with a different engine.

The BC-1 was the production version of the NA-26 prototype, with retractable tailwheel landing gear and the provision for armament, a two-way radio, and the 550-hp (410 kW) R-1340-47 engine as standard equipment. Production versions included the BC-1 (Model NA-36) with only minor modifications (177 built), of which 30 were modified as BC-1I instrument trainers; the BC-1A (NA-55) with airframe revisions (92 built); and a single BC-1B with a modified wing centre-section.

Three BC-2 aircraft were built before the shift to the "advanced trainer" designation, AT-6, which was equivalent to the BC-1A. The differences between the AT-6 and the BC-1 were new outer wing panels with a swept-forward trailing edge, squared-off wingtips, and a triangular rudder, producing the canonical Texan silhouette. After a change to the rear of the canopy, the AT-6 was designated the Harvard II for RAF/RCAF orders and 1,173 were supplied by purchase or Lend Lease, mostly operating in Canada as part of the British Commonwealth Air Training Plan.

Next came the AT-6A which was based on the NA-77 design and was powered by the Pratt & Whitney R-1340-49 Wasp radial engine. The USAAF received 1,549 and the US Navy 270 (as the SNJ-3). The AT-6B was built for gunnery training and could mount a .30 in machine gun on the forward fuselage. It used the R-1340-AN-1 engine, which was to become the standard for the remaining T-6 production. Canada's Noorduyn Aviation built an R-1340-AN-1-powered version of the AT-6A, which was supplied to the USAAF as the AT-16 (1,500 aircraft) and the RAF/RCAF as the Harvard IIB (2,485 aircraft), some of which also served with the Fleet Air Arm and Royal Canadian Navy.

In late 1937, Mitsubushi purchased two NA-16s as technology demonstrators and possibly a licence. However, the aircraft developed by Watanabe/Kyushu as the K10W1 (Allied code name Oak) bore no more than a superficial resemblance to the North American design. It featured a full monocoque fuselage as opposed to the steel tube fuselage of the T-6 and NA-16 family of aircraft, as well as being of smaller dimensions overall and had no design details in common with the T-6. It was used in very small numbers by the Imperial Japanese Navy from 1942 onwards. None survived the end of the war, and after the war, the Japanese Air Self Defense Force operated Texans.

The NA-88 design resulted in 2,970 AT-6C Texans and 2,400 as the SNJ-4. The RAF received 726 of the AT-6C as the Harvard IIA. Modifications to the electrical system produced the AT-6D (3,713 produced) and SNJ-5 (1,357 produced). The AT-6D, redesignated the Harvard III, was supplied to the RAF (351 aircraft) and Fleet Air Arm (564 aircraft). The AT-6G (SNJ-7) involved major advancements including a full-time hydraulic system and a steerable tailwheel and persisted into the 1950s as the USAF advanced trainer.

 

Subsequently, the NA-121 design with a completely clear rearmost section on the canopy, gave rise to 25 AT-6F Texans for the USAAF and 931, as the SNJ-6 for the US Navy. The ultimate version, the Harvard 4, was produced by Canada Car and Foundry during the 1950s, and supplied to the RCAF, USAF and Bundeswehr.

 

A total of 15,495 T-6s of all variants were built.

 

General characteristics

Crew: two (student and instructor)

Length: 29 ft (8.84 m)

Wingspan: 42 ft (12.81 m)

Height: 11 ft 8 in (3.57 m)

Wing area: 253.7 ft² (23.6 m²)

Empty weight: 4,158 lb (1,886 kg)

Loaded weight: 5,617 lb (2,548 kg)

Powerplant: 1 × Pratt & Whitney R-1340-AN-1 Wasp radial engine, 600 hp (450 kW)

Performance

Maximum speed: 208 mph at 5,000 ft (335 km/h at 1,500 m)

Cruise speed: 145 mph (233 km/h)

Range: 730 miles (1,175 km)

Service ceiling: 24,200 ft (7,400 m)

Rate of climb: 1200ft/min (6.1 m/s)

Wing loading: 22.2 lb/ft² (108 kg/m²)

Power/mass: 0.11 hp/lb (kW/kg)

Armament

Provision for up to 3× 0.30 in (7.62 mm) machine gun

 

 

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