G.91 YS

This page is about the Italian jet fighter G.91 YS. For other versions, see G.91 (Family).

G.91 YS

G.91 Y

AMX

G.91 YS

G.91 Y

AMX

Italy

VI Rank

Battle rating:

AB	RB	SB
9.7	9.3	9.7

Class:

Fighter

Jet fighter

Research:110 000

Purchase:620 000

Show in game

Description

The G.91 YS was based in the earlier G.91 Y, which was a complete redesign of the G.91 series of aircraft, going from a small and light airframe to a heavier and more capable one, with two afterburning engines, a longer range, and a bigger payload for ground attack missions. The G.91 YS was a version of this fighter developed for Switzerland, the main difference was slightly modified avionics and the addition of more modern loadouts, such as AIM-9 Sidewinders. Though the country was interested in acquiring the G.91, the purchase was never completed.

It was introduced in Update 1.87 "Locked On". In similar fashion to the French Super Mystere B2, the G.91 YS was outfitted with dual 30 mm DEFA autocannons in the cheeks of the forward fuselage. Also in the same vein, the G.91 YS was built to be a multi-role fighter as a fighter-interceptor or a fighter-bomber. Due to the increased power of the dual engines, this fighter when acting in a bomber role has the ability to carry up to 4,000 lbs of bombs, though configurations as low as 1,000 lbs is available. FFAR Mighty Mouse unguided rockets are another good option for taking out softer ground targets, since they have the potential to destroy a higher number of enemies in the hands of a skilled pilot. For air combat, the G.91 YS lacks countermeasures but compensates this with a very good flight performance, however it has a mediocre top speed, in a BR when most fighters are already supersonic; keep your speed high at all times or else you might become vulnerable to missiles and fast interceptors like the MiG-21s and F-104s that start to be very common.

General info

Flight performance

Arrestor gear

Accelerates braking by grabbing the brake cable on the deck of the aircraft carrier

Air brakes

Allows you to dramatically reduce the flight speed by releasing special flaps

Drogue parachute

Reduces braking distance when landing on any runway

Max speed

at 0 m1 123 km/h

Turn time29 s

Max altitude12 500 m

Engine2 х General Electric J85-GE-13A

TypeJet

Cooling systemAir

Take-off weight9 t

A bird's eye view of a G.91 YS fighter.

The G.91 YS is a very good Boom & Zoom fighter, the only issue is confronting other jets with afterburner capabilities which make your Boom & Zoom attempt more difficult. The YS has a lower turn speed than the other G.91s (swapped for acceleration and a little bit more speed) it is also two high power engines, making it possible to return to base on one engine or even fight like that if you want. Sadly the G.91 isn't supersonic but it can get close in a steep dive, making it one of the best trans-sonic jets!

Characteristics	Max Speed (km/h at 0 m - sea level)		Max altitude (metres)	Turn time (seconds)		Rate of climb (metres/second)		Take-off run (metres)
	AB	RB		AB	RB	AB	RB
Stock	1,114	1,109	12500	29.5	30.7	60.4	54.6	750
Upgraded	1,131	1,123		28.6	29.0	91.8	75.0

Details

Features
Combat flaps	Take-off flaps	Landing flaps	Air brakes	Arrestor gear	Drogue chute
✓	✓	✓	✓	✓	✓

Limits
Wings (km/h)	Gear (km/h)	Flaps (km/h)			Max Static G
		Combat	Take-off	Landing	+	-
1128	371	592	556	371	~11	~4

Optimal velocities (km/h)
Ailerons	Rudder	Elevators	Radiator
< 800	< 650	< 660	N/A

Engine performance

Engine			Aircraft mass
Engine name		Number	Empty mass			Wing loading (full fuel)
General Electric J85-GE-13A		2	4,350 kg			380 kg/m2
Engine characteristics			Mass with fuel (no weapons load)					Max Takeoff Weight
Weight (each)	Type		17m fuel	20m fuel	30m fuel	45m fuel	57m fuel
271 kg	Afterburning axial-flow turbojet		5,114 kg	5,246 kg	5,688 kg	6,351 kg	6,882 kg	8,500 kg
Maximum engine thrust @ 0 m (RB / SB)			Thrust to weight ratio @ 0 m (WEP)
Condition	100%	WEP	17m fuel	20m fuel	30m fuel	45m fuel	57m fuel	MTOW
Stationary	1,230 kgf	1,894 kgf	0.74	0.72	0.67	0.60	0.55	0.45
Optimal	1,242 kgf (1,000 km/h)	1,913 kgf (1,000 km/h)	0.75	0.73	0.67	0.60	0.56	0.45

Survivability and armour

Crew1 person

Speed of destruction

Structural1 128 km/h

Gear371 km/h

• 40 mm bulletproof glass in the canopy windshield (angled to provide about 94 mm of protection)
• 6.5 mm steel behind pilot's seat

Like many later generation jet fighters (those built in the 1960s-70s) the G.91 YS traded armour for greater ordnance carrying capacity. Though not without all armour, the canopy windshield has an effective thickness of 94 mm to protect the pilot in the event of a head-on attack. Though the 6.5 mm of steel behind the pilot's seat seem to be on the thin side, bullets coming in from that direction will need to pass through the engine first. If the pilot is going to be hit by bullets it will most likely be through side angle shots or from above.

Aerial shot of a G.91 YS at altitude.

Modifications and economy

Repair costBasic → Reference

AB3 134 → 4 259

RB10 793 → 14 667

SB10 094 → 13 717

Total cost of modifications196 000

303 000

Talisman cost2 700

Crew training175 000

Experts620 000

Aces2 600

Research Aces1 010 000

Reward for battleAB / RB / SB

130 / 380 / 600 %

226 / 226 / 226 %

Modifications

Flight performance	Survivability	Weaponry
Fuselage repair Research: 7 800 Cost: 12 000 310 Compressor Research: 7 800 Cost: 12 000 310 Airframe Research: 11 000 Cost: 17 000 430 New boosters Research: 11 000 Cost: 17 000 430 Wings repair Research: 9 800 Cost: 15 000 390 G-suit Research: 9 800 Cost: 15 000 390 Cover Research: 16 000 Cost: 25 000 630 Engine Research: 16 000 Cost: 25 000 630		aden_belt_pack Research: 7 800 Cost: 12 000 310 M82 Research: 7 800 Cost: 12 000 310 559G1 Research: 7 800 Cost: 12 000 310 M82-2 Research: 11 000 Cost: 17 000 430 LAU-3/A Research: 11 000 Cost: 17 000 430 aden_new_gun Research: 9 800 Cost: 15 000 390 M83 Research: 9 800 Cost: 15 000 390 LAU-10/A Research: 9 800 Cost: 15 000 390 M83-2 Research: 16 000 Cost: 25 000 630 AIM-9B Research: 16 000 Cost: 25 000 630

Armaments

Ballistic Computer
CCIP (Guns)	CCIP (Rockets)	CCIP (Bombs)	CCRP (Bombs)

Offensive armament

G.91 YS fighter with the sun setting behind it.

The G.91 YS is armed with:

• 2 x 30 mm DEFA 552 cannons, nose-mounted (125 rpg = 250 total)

Suspended armament

The G.91 YS can be outfitted with the following ordnance:

	1	2	3	4	5	6
500 lb LDGP Mk 82 bombs		1	1	1	1
500 lb Mk 82 Snakeye bombs		1	1	1	1
1,000 lb LDGP Mk 83 bombs		1	1	1	1
Aerea 559G1 incendiary bombs			1	1
FFAR Mighty Mouse rockets		19	19	19	19
Zuni Mk32 Mod 0 ATAP rockets		4	4	4	4
AIM-9B Sidewinder missiles	1					1
Maximum permissible loadout weight: 1,815 kg Maximum permissible wing load: 1,000 kg Maximum permissible weight imbalance: 800 kg

Default weapon presets
Without load 2 x 500 lb LDGP Mk 82 bombs (1,000 lb total) 4 x 500 lb LDGP Mk 82 bombs (2,000 lb total) 4 x 500 lb Mk 82 Snakeye bombs (2,000 lb total) 2 x 1,000 lb LDGP Mk 83 bombs (2,000 lb total) 4 x 1,000 lb LDGP Mk 83 bombs (4,000 lb total) 76 x FFAR Mighty Mouse rockets 16 x Zuni Mk32 Mod 0 ATAP rockets 2 x AIM-9B Sidewinder missiles 2 x Aerea 559G1 incendiary bombs

Usage in battles

The G.91 YS has a lot of power and energy potential, keep that in mind before going into battle. To add to this fighters punch, it also utilises AIM 9B missiles and in capable hands, this fighter can be a monster on the battlefield. The YS also has the capability of mounting 76 x FFAR Mighty Mouse rockets which provide the potential of low-altitude Boom & Zooming on trucks, anti-aircraft artillery, light tanks and even enemy fighters attempting an airfield capture, though this does not come without a cost. When dropping in low on ground targets, the fighter sacrifices its speed and manoeuvrability for that ordnance. The YS also can outfit a few bombs so the YS can then be used as a base bomber following up by attacking enemy fighters, but even still it isn't always reliable and can be easily intercepted from any other supersonic fighter jets patrolling the area.

Your biggest threats will be F-4Cs, MiG-19S/PT, F-100D, Mitsubishi T2, J-6A, J-7II, Hunter F.6, mainly because they have superior speed and ordnance. The Hunter is probably the best-matched jet to the G.91 YS. The only top tier jet which should not be too much of a pain is the Super Mystere B2, and F-86K because they have limited speed and slow acceleration compared and will never win in a vertical climb against the G.91 YS.

Pros and cons

G.91 YS popping its braking parachute upon landing.

Pros:

• Excellent acceleration and roll speed
• Able to carry air-to-air missiles
• Wide variety of payload options
• High rate of climb
• Deadly main armament
• Drag chute helps slow you down very quickly during landings

Cons:

• Slower than most planes it will face
• Limited ammo
• Slower turn rate compared to earlier G.91s
• Flaps and landing gear are prone to ripping off
• New booster module is a must to research in order to avoid crashing during a very fast and low-level dive
• AIM-9Bs have a poorer performance other air-to-air missiles at this BR
• No countemeasures

History

A G.91 YS heading into an active battle zone.

During the 1960s, Fiat began developing a successor to their previous G.91 fighter, which had thus far managed to obtain a favourable reputation with its operators. Fiat based their new aircraft heavily on the two-seat trainer version of the G.91 and decided outfit the aircraft with two General Electric J85 afterburning engines contrary to the preceding single-engine G.91.

Additionally, the aircraft's fuselage and wings were enlarged to accommodate 3 more fuel tanks (for a total capacity of 3200 liters), bigger powerplant and improve handling characteristics, while a slew of other tweaks and upgrades further enhanced the aircraft's overall design, including an automatic slat on the wing's leading edge. The new G.91Y performed its maiden flight in December 1966. Testing revealed minor aerodynamic issues which would be resolved on subsequent production aircraft with only minor redesigns. At high altitude extreme manoeuvres at high angles of attack could lead to engines flame-out.

Production of the G.91Y began with an initial order for 20 pre-production machines, following the manufacturing of two prototypes. This order would eventually go up to 75 aircraft, although only 67 including the initial prototypes were delivered in the end. By the mid 1970s, all outstanding orders for the G.91Y were fulfilled and production had ceased for this variant.

The G.91Y served exclusively with Italian squadrons up until the early 1990s, before being replaced by a more modern counterpart.

The G.91YS was a single prototype conversion of the G.91Y, which followed a requirement issued by the Swiss Air Force. The aircraft allowed installation of American Sidewinder air-to-air missiles (adding 2 more sub-wing pylons) and a Swedish weapons control system. This special prototype first flew in October 1970, but was eventually not accepted into service by the Swiss. The prototype was converted back into service as a regular G.91Y.

- From Devblog

Media

Skins

• Skins and camouflages for the G.91 YS from live.warthunder.com.

Images

• 
• 
• 
• 
• 
• 
• 

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

• reference to the series of the aircraft;
• links to approximate analogues of other nations and research trees.

External links

• [Devblog] G.91YS: Turning and Burning
• Official data sheet - more details about the performance

Fiat Aviation (Fiat Aviazione)
Fighters	CR.32 · CR.32 bis · CR.32 quater
	CR.42 · Marcolin's C.R.42 CN · ▀Marcolin's C.R.42 CN
	G.50 serie 2 · G.50 AS serie 7
	G.55 sottoserie 0 · G.55 serie 1 · G.55S
	G.56
Jet fighters	G.91 pre-serie · G.91 R/1 · G.91 Y · G.91 YS
	▄F-86K*
	▄F-104G* · F-104S* · F-104S.ASA* · ▄F-104S TAF*
Strike aircraft	F.C.20 Bis
Bombers	B.R.20DR · B.R.20M M1
Export/Captured	J11 · ▀CR.42
	▀G.50 serie 2 · ▀G.50 AS serie 7
	◄G.91 R/3 · ◄G.91 R/4 · G.91 R/4
	*Licensed
See also	North American Aviation · Lockheed Martin

Italy jet aircraft
Aerfer	Sagittario 2 · Ariete
Fiat	G.91 pre-serie · G.91 R/1 · G.91 R/4 (Portugal) · G.91 Y · G.91 YS
AMX International	AMX · AMX A-1A (Brazil)
Panavia	Tornado ADV · ▄Tornado IDS · ▄Tornado IDS (1995)
	Foreign:
Vampire	Vampire FB 52A
F-84	▄F-84F · ▄F-84G-21-RE
F-86	CL-13 Mk.4 · ▄F-86K
F-104	▄F-104G · F-104S · ▄F-104S TAF (Turkey) · F-104S.ASA
F-16	▄F-16A ADF
AV-8	▄AV-8B Plus
Hungary
Mikoyan-Gurevich	◔MiG-15bis · ◔MiG-17PF · ◔MiG-21MF · ◔MiG-21bis-SAU · ◔MiG-23MF · ◔MiG-29
Ilyushin	◔IL-28
Sukhoi	◔Su-22M3
Saab	◔JAS39EBS HU C