HOME | DD

Description
Link: www.flickr.com/photos/dizzyfug…

Some background
The Fiat G.91 was an Italian jet fighter aircraft, the winner of the NATO competition in 1953 as standard equipment for Allied air forces. European manufacturers were invited to submit their designs for this requested Light Weight Strike Fighter (LWSF) role. The G.91 was designed to this specification by the Italian engineer Giuseppe Gabrielli, hence the "G" designation. The competition was intended to produce an aircraft that was light, small, expendable, equipped with basic weapons and avionics and capable of operating with minimal ground support. These specifications were developed for two reasons: the first was the nuclear threat to large air bases, many cheaper aircraft could be better dispersed, and the other was to counter the trend towards larger and more expensive aircraft.

The technical requirements were:
• 1,100 m (3,610 ft) takeoff distance over a 15 m (49 ft) obstacle
• Capability to operate from grass strips and streets
• Maximum speed of Mach 0.95
• Range of 280 km (170 mi) with 10 minutes over the target
• Armoured protection for the pilot and the fuel tanks
• 4 × 12.7 mm (.5 in) or 2 × 20 mm or 30 mm guns
• A maximum of 2,200 kg (4,850 lb) empty weight and 4,700 kg (10,360 lb) max weight

The challenge of providing an engine that matched the requirements of lightness and power, reliability and ease of maintenance was solved by using the Bristol Siddeley Orpheus turbojet.
After the loss of the G.91 prototype, the French government preferred to pursue development of the locally-designed Étendard. The British government similarly ignored the competition to concentrate on Hawker Hunter production for the same role. The type was also considered by Austria, Norway, Switzerland, and even the United States Army, which briefly evaluated the type as a possible Forward Air Control (FAC) aircraft before relinquishing all fixed-wing aircraft operations to the USAF.

The G.91 entered operational service with the Italian Air Force in 1961, with West Germany's Luftwaffe in 1962, and later with the Portuguese Air Force (German surplus machines). The first G.91s entered service with the Royal Norwegian Air Force in August 1967. The original R/5 variant for Norway with increased range had been cancelled, but the RNoAF took over fourty-two G.91 R/4 aircraft from a cancelled Greek/Turkish order. These planes were originally armed with four 12.7 mm (0.5 in) Colt-Browning machine guns and powered by the Rolls-Royce Orpheus turbojet engine. Their main role was close air support, tactical sea combat and reconnaissance. One special Norwegian feature was the retrofitted brake parachute housing under the base of the fin.

In 1980, the Norwegian planes saw a major overhaul (MLU), combined with an update concerning both performance and attack capability. The Orpheus was replaced by a single Rolls-Royce Turbomeca Adour Mk. 106 turbofan (developed for the SEPECAT Jaguar), which offered not only slightly better dry thrust than the former engine but also a better fuel consumption and an afterburner for enhanced rate of climb and acceleration. As a side effect. top speed was slightly improved, as well as range and the weapon load. A similar step was taken with the G.91 Y in Italy, where the original Bristol Siddeley Orpheus engine was replaced with two General Electric afterburner J85 units - only that this "Yankee" was literally a new aircraft.

In order to achieve true all-weather capability, esp. against targets at sea, the G.91N, how the planes were called now, were fitted with a Thomson-CSF Agave radar in a new nose section, reminiscent of the F-86D/K "Sabre Dog" interceptor. The original cameras in the nose were deleted, an external camera pod was developed for reconnaissance duties.

The planes’ strike potential was also heavily augmented by the integration of the Norwegian AGM-119 "Penguin" short-to-medium range (up to 50km) naval guided missile. The AGM-119 was developed by Kongsberg Defence & Aerospace (KDA) and was the first AShM of the western world with a passive IR seeker instead of the commonly used active radar technology. Propelled by a solid rocket engine and flying at low altitude and high subsonmic speed, it performs random weaving maneuvres at target approach and hits the target close to the waterline, its 120 kg warhead detonates inside the target ship by using a delay fuze. Additionally, the original four 0.5” machine guns were replaced by a pair of DEFA 552 30 mm cannons with 125 RPG, and AIM-9 Sidewinder could be carried for self-defense.

In this new guise, the Norwegian "Ginos", as they were called by their crews, soldiered on until 1991, when they were retired and replaced by the much more capable and versatile F-16.

All in all, the G.91 remained in production for 19 years, the last planes retired in Italy in 1995. 756 aircraft were completed, including the prototypes and pre-production models. The assembly lines were finally closed in 1977. The Fiat G.91 enjoyed a long service life that extended over 35 years.

General characteristics:
Crew: 1
Length: 10.5 m (34 ft 5 in)
Wingspan: 8.56 m (28 ft 1 in)
Height: 4.0 m (13 ft 1 in)
Wing area: 16.4 m² (177 ft²)
Empty weight: 3,300 kg (6,830 lb)
Loaded weight: 5,640 kg (11,990 lb)
Max. take-off weight: 5,700 kg (12,100 lb)

Maximum speed: 1,125 km/h (608 kn, 700 mph) at optimum height
Range: 1,700 km (920 nmi, 1.060 mi)
Service ceiling: 13,100 m (43,000 ft)
Rate of climb: 85 m/s (16.725 ft/min)
Wing loading: 331 kg/m² (67.8 lb/ft²)
Thrust/weight: 0.42

Powerplant:
Rolls-Royce/Turbomeca Adour Mk 106 turbofan with 6,000 lb (27.0 KN) dry / 8,430 lb (37.5 KN) with reheat

Armament:
2× 30 mm (1.18 in) DEFA 552 30 mm cannon with 125 rounds per gun
4× under-wing pylon stations holding up to maximum of 1,814 kg/4,000 lb of payload, including 2x AGM-119 Penguin missiles, Matra rocket pods (each with 19× SNEB 68 mm rockets or 18× Hispano SURA R80 80 mm rockets. AIM-9 Sidewinder can be carried for self defense, as well as a wide variety of air-to-ground ordnance including unguided iron bombs, gun pods in addition to auxiliary drop tanks for extended range.

Description
Link: www.flickr.com/photos/dizzyfug…

Some background
The Fiat G.91 was an Italian jet fighter aircraft, the winner of the NATO competition in 1953 as standard equipment for Allied air forces. European manufacturers were invited to submit their designs for this requested Light Weight Strike Fighter (LWSF) role. The G.91 was designed to this specification by the Italian engineer Giuseppe Gabrielli, hence the "G" designation. The competition was intended to produce an aircraft that was light, small, expendable, equipped with basic weapons and avionics and capable of operating with minimal ground support. These specifications were developed for two reasons: the first was the nuclear threat to large air bases, many cheaper aircraft could be better dispersed, and the other was to counter the trend towards larger and more expensive aircraft.

The technical requirements were:
• 1,100 m (3,610 ft) takeoff distance over a 15 m (49 ft) obstacle
• Capability to operate from grass strips and streets
• Maximum speed of Mach 0.95
• Range of 280 km (170 mi) with 10 minutes over the target
• Armoured protection for the pilot and the fuel tanks
• 4 × 12.7 mm (.5 in) or 2 × 20 mm or 30 mm guns
• A maximum of 2,200 kg (4,850 lb) empty weight and 4,700 kg (10,360 lb) max weight

The challenge of providing an engine that matched the requirements of lightness and power, reliability and ease of maintenance was solved by using the Bristol Siddeley Orpheus turbojet.
After the loss of the G.91 prototype, the French government preferred to pursue development of the locally-designed Étendard. The British government similarly ignored the competition to concentrate on Hawker Hunter production for the same role. The type was also considered by Austria, Norway, Switzerland, and even the United States Army, which briefly evaluated the type as a possible Forward Air Control (FAC) aircraft before relinquishing all fixed-wing aircraft operations to the USAF.

The G.91 entered operational service with the Italian Air Force in 1961, with West Germany's Luftwaffe in 1962, and later with the Portuguese Air Force (German surplus machines). The first G.91s entered service with the Royal Norwegian Air Force in August 1967. The original R/5 variant for Norway with increased range had been cancelled, but the RNoAF took over fourty-two G.91 R/4 aircraft from a cancelled Greek/Turkish order. These planes were originally armed with four 12.7 mm (0.5 in) Colt-Browning machine guns and powered by the Rolls-Royce Orpheus turbojet engine. Their main role was close air support, tactical sea combat and reconnaissance. One special Norwegian feature was the retrofitted brake parachute housing under the base of the fin.

In 1980, the Norwegian planes saw a major overhaul (MLU), combined with an update concerning both performance and attack capability. The Orpheus was replaced by a single Rolls-Royce Turbomeca Adour Mk. 106 turbofan (developed for the SEPECAT Jaguar), which offered not only slightly better dry thrust than the former engine but also a better fuel consumption and an afterburner for enhanced rate of climb and acceleration. As a side effect. top speed was slightly improved, as well as range and the weapon load. A similar step was taken with the G.91 Y in Italy, where the original Bristol Siddeley Orpheus engine was replaced with two General Electric afterburner J85 units - only that this "Yankee" was literally a new aircraft.

In order to achieve true all-weather capability, esp. against targets at sea, the G.91N, how the planes were called now, were fitted with a Thomson-CSF Agave radar in a new nose section, reminiscent of the F-86D/K "Sabre Dog" interceptor. The original cameras in the nose were deleted, an external camera pod was developed for reconnaissance duties.

The planes’ strike potential was also heavily augmented by the integration of the Norwegian AGM-119 "Penguin" short-to-medium range (up to 50km) naval guided missile. The AGM-119 was developed by Kongsberg Defence & Aerospace (KDA) and was the first AShM of the western world with a passive IR seeker instead of the commonly used active radar technology. Propelled by a solid rocket engine and flying at low altitude and high subsonmic speed, it performs random weaving maneuvres at target approach and hits the target close to the waterline, its 120 kg warhead detonates inside the target ship by using a delay fuze. Additionally, the original four 0.5” machine guns were replaced by a pair of DEFA 552 30 mm cannons with 125 RPG, and AIM-9 Sidewinder could be carried for self-defense.

In this new guise, the Norwegian "Ginos", as they were called by their crews, soldiered on until 1991, when they were retired and replaced by the much more capable and versatile F-16.

All in all, the G.91 remained in production for 19 years, the last planes retired in Italy in 1995. 756 aircraft were completed, including the prototypes and pre-production models. The assembly lines were finally closed in 1977. The Fiat G.91 enjoyed a long service life that extended over 35 years.

General characteristics:
Crew: 1
Length: 10.5 m (34 ft 5 in)
Wingspan: 8.56 m (28 ft 1 in)
Height: 4.0 m (13 ft 1 in)
Wing area: 16.4 m² (177 ft²)
Empty weight: 3,300 kg (6,830 lb)
Loaded weight: 5,640 kg (11,990 lb)
Max. take-off weight: 5,700 kg (12,100 lb)

Maximum speed: 1,125 km/h (608 kn, 700 mph) at optimum height
Range: 1,700 km (920 nmi, 1.060 mi)
Service ceiling: 13,100 m (43,000 ft)
Rate of climb: 85 m/s (16.725 ft/min)
Wing loading: 331 kg/m² (67.8 lb/ft²)
Thrust/weight: 0.42

Powerplant:
Rolls-Royce/Turbomeca Adour Mk 106 turbofan with 6,000 lb (27.0 KN) dry / 8,430 lb (37.5 KN) with reheat

Armament:
2× 30 mm (1.18 in) DEFA 552 30 mm cannon with 125 rounds per gun
4× under-wing pylon stations holding up to maximum of 1,814 kg/4,000 lb of payload, including 2x AGM-119 Penguin missiles, Matra rocket pods (each with 19× SNEB 68 mm rockets or 18× Hispano SURA R80 80 mm rockets. AIM-9 Sidewinder can be carried for self defense, as well as a wide variety of air-to-ground ordnance including unguided iron bombs, gun pods in addition to auxiliary drop tanks for extended range.