Transavia Corporation

Transavia Corporation was an Australian aircraft manufacturer established in 1965 as a subsidiary of Transfield. Its principal business was the development and production of agricultural aircraft, particularly aircraft intended for aerial top-dressing and related low-level farm operations. The company operated during a period when agricultural aviation was used to distribute fertilizer, seed, and crop-treatment materials over large or difficult-to-access areas. Transavia took over and further developed an aircraft design that originated in New Zealand. Luigi Pellarini had designed the earlier Kingsford Smith PL-7 tanker aircraft in 1956. That prototype used components derived from North American T-6 Texan aircraft and was powered by a Cheetah engine. Two more developed aircraft, designated PL-11 Airtrucks, were subsequently built in New Zealand by Bennett Aviation, later known as Waitomo Aircraft. Transavia acquired the design in 1965 and refined it into the Transavia PL-12 Airtruk. The PL-12 had an unusual configuration shaped by its agricultural role. It was a mid-wing monoplane with a small lower wing-like structure that supported the wing bracing struts and the two main wheels of its tricycle landing gear. Two slender rear booms carried separate tail assemblies, with the tailplanes positioned on top of the fin and rudder units. Unlike a conventional twin-boom aircraft, the rear booms were not connected by a common rear fuselage. The cockpit was mounted high on a compact central fuselage, giving the pilot visibility during low-altitude operations. A chemical hopper was positioned beneath the pilot, with its loading opening immediately behind the cockpit. The aircraft was primarily designed for agricultural spraying and top-dressing, but Transavia also produced a utility cargo version. Early production aircraft used a Continental IO-520-D engine rated at 300 horsepower. In 1981, the design was revised as the PL-12-300 Skyfarmer, incorporating a strengthened upper fuselage and a larger cockpit fitted with a rollover-protection truss. The final major derivative was the PL-12-400, which used a 400-horsepower Lycoming IO-720 engine and featured a larger dorsal fin and revised lower sesquiplane surfaces. Transavia produced 118 Airtruk aircraft in total. Although the corporation was active only from 1965 to 1985, examples of the Airtruk continued to operate after the manufacturer ceased business. The company is therefore chiefly remembered for extending and industrializing the Airtruk design rather than for a broad portfolio of aircraft types. Available reference material does not identify individual founders, chief executives, a separate headquarters location, a corporate website, public listing information, or a later corporate successor.

Transavia Corporation was formed in Australia in 1965 as a subsidiary of Transfield. Its creation reflected an effort to establish local production of an agricultural aircraft based on work that had begun in New Zealand nearly a decade earlier. The original concept was Luigi Pellarini's Kingsford Smith PL-7, a single-engine tanker aircraft designed in 1956. The PL-7 incorporated components from T-6 Texan aircraft and used a Cheetah engine. Two further and more refined aircraft were built in New Zealand in the early 1960s by Bennett Aviation, an enterprise later associated with the name Waitomo Aircraft. These aircraft were designated PL-11 Airtruks. After taking over the design in 1965, Transavia revised the aircraft's engineering and production specification. The resulting PL-12 Airtruk was configured specifically for agricultural work, including aerial fertilizer distribution, spraying, and low-level operations over farmland. Its appearance was unconventional because the design prioritized visibility, loading access, structural practicality, and operation from relatively basic airfields rather than conventional aerodynamic form. The pilot sat above the central fuselage and the chemical hopper was placed below the cockpit. A loading aperture behind the cockpit allowed agricultural material to be placed into the hopper. The PL-12 used a mid-wing arrangement supplemented by a lower wing-like structure. This lower structure supported the wing bracing and the main landing-gear wheels. Twin rear booms extended behind the central fuselage, each carrying a fin and rudder assembly with the tailplanes mounted above them. The booms were not joined at the back, creating a distinctive open rear layout. Early production aircraft were powered by a 300-horsepower Continental IO-520-D engine. In addition to the agricultural version, Transavia built a utility configuration capable of carrying cargo. Transavia continued to refine the aircraft during production. In 1981 it introduced the PL-12-300, also known as the Skyfarmer. This version strengthened the upper fuselage and enlarged the cockpit. The larger cockpit incorporated a rollover-protection truss, reflecting the hazards associated with agricultural flying and operations close to the ground. The final derivative was the PL-12-400. It adopted a 400-horsepower Lycoming IO-720 engine and included a larger dorsal fin together with revised lower sesquiplane surfaces. The PL-12 program became Transavia's defining industrial achievement. Total production by Transavia reached 118 Airtruk aircraft. The corporation remained active from 1965 until 1985, after which it ceased manufacturing operations. The aircraft nevertheless had a life beyond the company itself, with examples remaining in active operation according to the available reference material. Transavia's historical importance consequently rests on the PL-12's specialized agricultural role, its Australian production history, and the survival of the type after the end of the manufacturer's corporate activity. Publicly available material supplied for this entry does not provide reliable information about named executives, specific production dates for individual aircraft, sales figures, headquarters, or the precise circumstances of the company's closure.

• 1985

  Corporate activity ended

  [1]Transavia Corporationen.wikipedia.org

  Transavia Corporation's operating period ended after approximately two decades of aircraft manufacturing.

• 1981

  PL-12-300 Skyfarmer introduced

  [1]Transavia Corporationen.wikipedia.org

  Transavia introduced the PL-12-300 Skyfarmer, featuring a strengthened upper fuselage, a larger cockpit, and a rollover-protection truss.

• 1965

  Transavia Corporation established

  [1]Transavia Corporationen.wikipedia.org

  Transavia Corporation was formed as a Transfield subsidiary and took over the Airtruk design for further development and production in Australia.

• 1960

  PL-11 Airtruks built in New Zealand

  [1]Transavia Corporationen.wikipedia.org

  Two more developed PL-11 Airtruk aircraft were built in New Zealand by Bennett Aviation, later associated with Waitomo Aircraft.

• 1956

  PL-7 tanker design created

  [1]Transavia Corporationen.wikipedia.org

  Luigi Pellarini designed the Kingsford Smith PL-7, an early single-engine agricultural tanker aircraft that established the design lineage later developed into the Airtruk.

A specialist Australian aircraft manufacturer focused on rugged, purpose-built aircraft for agricultural aviation and associated utility operations.

• Agricultural aircraft · 1965

  Transavia PL-12 Airtruk

  The PL-12 Airtruk was Transavia's principal aircraft and the company's best-known product. It inherited the basic configuration of the earlier PL-11 but was refined for Australian production and agricultural service. The aircraft placed the pilot high above a central fuselage for visibility, located a chemical hopper beneath the cockpit, and used a distinctive twin-boom tail arrangement. Its structure also included a lower wing-like element supporting the bracing and main landing gear. The design was intended for aerial top-dressing, spraying, and other low-level farm work, with a utility cargo variant also produced.

• Agricultural aircraft derivative · 1981

  Transavia PL-12-300 Skyfarmer

  The PL-12-300 Skyfarmer was a later development of the Airtruk introduced in 1981. It strengthened the upper fuselage and provided a larger cockpit equipped with a rollover-protection truss. These changes addressed durability and pilot protection within the demanding operating environment of agricultural aviation. The variant retained the Airtruk's specialized layout and agricultural mission rather than representing a wholly new aircraft family.

• Agricultural aircraft derivative

  Transavia PL-12-400

  The PL-12-400 was the final major Airtruk derivative identified in the available reference material. It used a 400-horsepower Lycoming IO-720 engine, a larger dorsal fin, and revised lower sesquiplane surfaces. The variant continued the aircraft's role in agricultural aviation while providing a more powerful engine and further airframe refinements.

1. 1Transavia Corporationen.wikipedia.org