Origins In 1962, NATO issued a specification for a
V/STOL transport aircraft (
NATO Basic Military Requirement 4), capable of supporting dispersed V/STOL fighters. Fiat's design team, led by Giuseppe Gabrielli, produced a design to meet this requirement, designated
G.222; it was to be powered by two
Rolls-Royce Dart turboprop engines and with six to eight
Rolls-Royce RB162 lift engines to give VTOL capability. According to Aeritalia, the G.222 designation is derived from the first letter of the aircraft's chief designer; the first '2' referring to the twin-engine arrangement, and the final '22' referring to the revised
NATO Basic Military Requirement 22 to which it had been submitted. the twin-boom tail featured on the V/STOL concept was also eliminated and replaced by a more conventional single tail configuration; subsequently the new aircraft had no V/STOL capability but retained considerable short take-off/landing (
STOL) performance. . On 18 July 1970, the first prototype performed the aircraft's
maiden flight with test pilot
Vittorio Sanseverino at the controls. By late April 1971, the prototype had reportedly conducted a total of 22 flights and accumulated 50 hours of flight time, during which its performance was claimed to have been highly close to predictions. In December 1971, the Italian Air Force, who had placed a provisional order for the developing type, formally began evaluating the G.222 and the performance of the two prototypes then in service. Following a successful testing period, the AMI contract for 44 aircraft was issued to
Aeritalia (of which Fiat Aviazione had since become a part). In December 1975, the first production aircraft conducted its first flight. Following on from its introduction by the AMI, the G.222 was procured as a tactical transport aircraft by various international customers, including
Argentina,
Nigeria,
Somalia,
Venezuela and
Thailand. In December 1978, Aeritalia elected to transfer final assembly of the G.222 from
Turin to
Naples, at which point a total of 44 firm orders had been obtained for the type and one aircraft per month was being manufactured. Manufacturing of the G.222 was broken down into various companies; construction of the fuselage was performed at Naples, the center-section of the wing was produced by
Piaggio, the wing panels were made by
Macchi, the tail surfaces were built by
SIAI-Marchetti, the engine nacelles by IAM, and the T64 engines were
license-manufactured by
Alfa Romeo and
Fiat. The provision of alternative powerplants was viewed by Aeritalia as a measure to widen the overall appeal of the G.222; the Tyne engine also reportedly possessed greater growth potential than the T64 engine. In 1990, the
United States Air Force selected the G.222 as the basis of a "Rapid-Response Intra-Theater Airlifter" (RRITA). Operated under the designation
C-27A Spartan, ten G.222s were purchased and underwent avionics upgrades by
Chrysler Aerospace. These aircraft were stationed at
Howard AFB,
Panama. The USAF would later dispose of their C-27A fleet, partly due to shifting priorities between the Army and the Air Force and partly because of the impending introduction of a newer variant, the
Alenia C-27J Spartan. ==Design==