Trisha Shetty

Fiat G.91Y

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Top speed  1,110 km/h
Length  12 m
First flight  December 27, 1966
Wingspan  9 m
Engine type  General Electric J85
Manufacturer  Aeritalia
Fiat G.91Y httpsuploadwikimediaorgwikipediacommonscc

The Fiat G.91Y was an Italian ground-attack and reconnaissance aircraft which first flew in 1966. Resembling its predecessor, the Fiat G.91, the aircraft was a complete redesign, a major difference being its twin engines, rather than the original single engine.

Contents

Fiat G.91Y The Fiat G91 R3 and G91 Y for the Luftwaffe Suggestions War

Design and development

Fiat G.91Y Aeritalia Fiat G91Y Specifications Technical Data Description

The G.91Y was an increased-performance version of the Fiat G.91 funded by the Italian government. Based on the G.91T two-seat trainer variant, the single Bristol Orpheus turbojet engine of this aircraft was replaced by two afterburning General Electric J85 turbojets which increased thrust by 60% over the single-engined variant. Structural modifications to reduce airframe weight increased performance further and an additional fuel tank occupying the space of the G.91T's rear seat provided extra range. Combat manoeuvrability was improved with the addition of automatic leading edge slats.

Fiat G.91Y Fiat G91Y Italy Air Force Aviation Photo 1823429 Airlinersnet

The avionics equipment of the G.91Y was considerably upgraded with many of the American, British and Canadian systems being licence-manufactured in Italy.

Fiat G.91Y Fiat G91Y Italy Air Force Aviation Photo 0981676 Airlinersnet

Flight testing of three pre-production aircraft was successful, with one aircraft reaching a maximum speed of Mach 0.98. Airframe buffeting was noted and was rectified in production aircraft by raising the position of the tailplane slightly.

Production

Fiat G.91Y Fiat G91

An initial order of 55 aircraft for the Italian Air Force was completed by Fiat in March 1971, by which time the company had changed its name to Aeritalia (from 1969, when Fiat aviazione joined the Aerfer). The order was increased to 75 aircraft with 67 eventually being delivered. In fact, the development of the new G.91Y was quite long, and the first order was for about 20 pre-series examples that followed the two prototypes. The first pre-series 'Yankee' (the nickname of the new aircraft) flew in July 1968.

AMI (Italian Air Force) placed orders for two batches, 35 fighters followed by another 20, later cut to ten. The last one was delivered around mid 1976, so the total was two prototypes, 20 pre-series and 45 series aircraft. No export success followed. These aircraft served with 101° Gruppo/8° Stormo (Cervia-S.Giorgio) from 1970, and later, from 1974, they served with the 13° Gruppo/32° Stormo (Brindisi). Those 'Gruppi' (Italian equivalent of British 'squadrons', usually equipped with 18 aircraft) lasted until the early '90s, as the only ones equipped with the 'Yankee', using them as attack/recce machines, both over ground and sea, until the AMX replaced them.

Variants

  • G.91Y - Prototype and production aircraft.
  • G.91YT - Projected two-seat trainer variant.
  • G.91YS - Prototype with enhanced avionics and extra hardpoints to carry AIM-9 Sidewinder missiles for evaluation by Switzerland. First flown on 16 October 1970.
  • Operators

     Italy
  • Italian Air Force operated 65 Fiat G.91Ys until 1994
  • Aircraft on display

    A Fiat G.91Y is preserved and on public display at the Italian Air Force Museum, Vigna di Valle near Rome.

    Specifications (G.91Y)

    Data from The Observer's Book of Aircraft.

    General characteristics

  • Crew: one
  • Length: 11.67 m (38 ft 3.5 in)
  • Wingspan: 9.01 m (29 ft 6.5 in)
  • Height: 4.43 m (14 ft 6.3 in)
  • Wing area: 18.13 m² (195.149 ft²)
  • Empty weight: 3,900 kg (8,598 lb)
  • Loaded weight: 7,800 kg (17,196 lb)
  • Max. takeoff weight: 8,700 kg (19,180 lb)
  • Powerplant: 2 × General Electric J85-GE-13A turbojets, 18.15 kN (4,080 lbf) each
  • Performance

  • Maximum speed: 1,110 km/h (600 kn, 690 mph. (Mach 0.95 at 10,000 m (33,000 ft)
  • Range: 3,400 km (ferry range with droptanks) (2,110 mls)
  • Service ceiling: 12,500 m (41,000 ft)
  • Rate of climb: 86.36 m/s (17,000 ft/min)
  • Wing loading: 480 kg/m² (98.3 lb/ft² (maximum)
  • Thrust/weight: 0.47 at maximum loading
  • Armament

  • Guns: 2 × 30 mm (1.18 in) DEFA cannons
  • Hardpoints: 4 under-wing pylon stations with a capacity of 1,814 kg (4,000 lb)
  • References

    Fiat G.91Y Wikipedia


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