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by The Spooky Scary States of Fujiwara Tochi. . 18 reads.

Hayabusa F-111 "Ichinomiya"

The Hayabusa-Teikatsu F-111 Ichinomiya is a limited use, supersonic, medium-range, multirole combat aircraft. Production variants of the F-111 had roles that included ground attack (e.g. interdiction), strategic bombing (including nuclear weapons capabilities), reconnaissance and electronic warfare. Developed in the 2021s by Hayabusa-Teikatsu, the F-111 expected to enter service in 2022 with the Fujiwara National Air Service (FNAS) and the Fujiwara Naval Air Wing (FNAW) with F-111F variant.

F-111 "Ichinomiya"




An F-111A of the 7th Interceptor Squadron in 2021


Role: Attack aircraft;
strategic bomber;
reconnaissance;
electronic warfare (prototype)

National origin: Fujiwara Tochi (Shiraishōwa)

Manufacturer: Hayabusa-Teikatsu

Operator: Fujiwara National Air Service
Fujiwara Naval Air Wing

Status: In limited service

In service: 2021-Present

General characteristics

  • Crew: 2

  • Length: 22.40 m (73 ft 6 in)

  • Wingspan: 19 m (63 ft)

  • Swept wingspan: 9.8 m (32 ft) swept

  • Height: 5.220 m (17 ft 1.5 in)

  • Wing area: 61.07 m (657.4 sq ft) spread, 48.8 m (525 sq ft) swept

  • Aspect ratio: 7.56 spread
    1.95 swept

  • Empty weight: 21,410 kg (47,200 lb)

  • Gross Weight: 37,557 kg (82,800 lb)

  • Max takeoff weight: 45,359 kg (100,000 lb)

  • Fuel capacity: unknown

  • Installed engine powerplant: 2 x afterburning turbofan engines,
    17,900 lbf (80 kN) thrust each dry, 25,100 lbf (112 kN) with afterburner

Performance

  • Maximum speed: 2,656 km/h (1,650 mph; 1,434 kn) / Mach 2.2 at high altitude
    1,472 km/h (915 mph; 795 kn) / Mach 1.2 at sea level

  • Maximum speed: Mach 2.5

  • Cruise speed: ~ 970 km/h (603 mph; 524 kn)

  • Range: 5,940 km (3,690 mi, 3,210 nmi)

  • Combat range: 2,140 km (1330 mi; 1155.5 nmi)

  • Maximum Ferry Range: 5,940 km (3,690 mi, 3,210 nmi) with external drop tanks

  • Service ceiling: 20,000 m (66,000 ft)

  • Rate of climb: 131.5 m/s (25,890 ft/min)

  • Wing loading: 620 kg/m (126 lb/sq ft) spread
    771 kg/m (158 lb/sq ft) wings swept

  • Thrust/weight: 0.61

    Armament

    • 1 20 mm (0.787 in) 6-barreled Gatling cannon in weapons bay (seldom fitted), 2,084-rounds

    • Up to 14,300 kg (31,500 lb) of weapons on nine external hardpoints (8 under-wing, 1 under-fuselage between engines) plus 2 attach points in weapons bay, including general-purpose bombs, hardened penetration bombs, Precision guided munition, runway-cratering bomb, cluster bombs, Combined Effects Munition, TV- and laser-guided bombs, rocket pods, air-to-ground missiles, Anti-radiation missile, anti-ship missiles and nuclear weapons. Other variants carry reconnaissance, targeting, electronic countermeasures and baggage pods, and external fuel tanks may also be carried.

The F-111, the fourth locally made jet engine aircraft after the F-86 Sabre, pioneered several technologies for the current time, including variable-sweep wings, afterburning turbofan engines, and automated terrain-following radar for low-level, high-speed flight. Its design influenced the upcoming F-114 Tsubasa, and some of its advanced features derived from the F-110A have since become commonplace. The F-111 however suffered a variety of problems during initial development.

A fighter variant, the F-111A, is still under development. The F-111A was intended to perform aircraft carrier-based roles with the Shiraishōwan Navy, including long-range interception. However the F-114 Tsubasa Prototype Fighter showed promising results, F-111A might as well receive a short life service within the Naval Air Wing.

Concerned over the increasing capability of enemy aircrafts penetrating into Shiraishōwan airspace, the Fujiwaran National Air Service sent a list of requirements to several design competitors for a fighter-bomber with deep strike and interdiction roles.

One designer company, Hayabusa-Teikatsu, the same company that designed the legendary A6Ms in 1940's, have came forward with the general design describing the fighter-bomber using a simple variable geometry wing configuration with the pivot points farther out from the aircraft's centerline, similar to the old Sabre's.

Overall, the FNAS decided to use long-range, high-endurance interceptor aircraft design with the intention of protecting its carrier battle groups against long-range anti-ship missiles.

The aircraft sought by the two armed services shared the need to carry heavy armament and fuel loads, feature high supersonic speed, twin engines and two seats situated next to each other. This, coupled by the desperate need from the Ministry of Defense, forced the Navy and Air Force to cooperate in a similar design development, this also paved way for the Tactical Experimental Fighter (TF-X).

As months passed, the design requirement of both armed services begin to separate, The Air Force and the Navy could agree only on swing-wing, two-seat, twin-engine design features. The Air Force wanted a tandem-seat aircraft for low-level penetration ground-attack, while the Navy wanted a shorter, high altitude interceptor with side-by-side seating to allow the pilot and radar operator to share the radar display. Also, the Air Force wanted the aircraft designed for 7.33 g with Mach 2.5 speed at altitude and Mach 1.2 speed at low level with an approximate length of 70 ft (21.3 m). The Navy had less strenuous requirements of 6 g with Mach 2 speed at altitude and high subsonic speed (approx. Mach 0.9) at low level with a length of 56 ft (17.1 m). The Navy also wanted the aircraft with a nose large enough for a 48 in (1.2 m) diameter radar dish.

In the end, a agreement is made to use the Navy Design Proposal of an all-weather attack aircraft, capable of landing on carriers easily. The "F-111" featured variable-geometry wings, an internal weapons bay and a cockpit with side-by-side seating. With the first batch of initial production will begin in 15th September.

The design phase mockup showed quite good results after inspection by both armed services, with additional requirement of the Navy variant using Pulse-Doppler Radar while the Air Force using Terrain-following radar.

Initially there were compressor surge and stall issues in certain parts of the flight regime. Several studies resulted in the engine inlet design being modified in the production phase, ending with new engine designs.

After the testing phase ended in July 8th 2021, orders were given out to produce 30 F-111's with several variant refits/rebuilds are underway.


Four-photo series showing the F-111X wing sweep sequence

The F-111 was an all-weather attack aircraft, capable of low-level penetration of enemy defenses to deliver ordnance on the target. The F-111 featured variable-geometry wings, an internal weapons bay and a cockpit with side-by-side seating. The cockpit was part of an escape crew capsule. The wing sweep varied between 16 degrees and 72.5 degrees (full forward to full sweep). The wing included leading edge slats and double slotted flaps over its full length. The airframe was made up mostly of aluminium alloys with steel, titanium and other materials used in places. The fuselage was made of a semi-monocoque structure with stiffened panels and honeycomb structure panels for skin.

The F-111 used a three-point landing gear arrangement, with a two-wheel nose gear and two single-wheel main landing gear units. The landing gear door for the main gear, which was positioned in the center of the fuselage, also served as a speed brake in flight. Most F-111 variants included a terrain-following radar system connected to the autopilot. The aircraft was powered by two afterburning turbofan engines. The F-111's variable-geometry wings, escape capsule, terrain following radar and afterburning turbofans were actually new technologies for production aircraft and for the air force to work with.

view of F-111 cockpit during a night flight

The F-111 featured an internal weapons bay that could carry bombs, a removable 20 mm Gatling cannon or auxiliary fuel tanks. For bombs, the bay could hold two 340 kg (750 lb) conventional bombs, one nuclear bomb or practice bombs. The F-111C for the Navy was to carry two long-range air-to-air missiles in the bay. The cannon had a large 2,084-round ammunition tank, and its muzzle was covered by a fairing; however, it was rarely fitted on F-111s.

F-111 external payload of concrete penetration bombs

For external ordinance, each wing was equipped with four underwing pylons. The inner two pylons on each wing rotated to align with the fuselage, while the outer two were fixed. Each pylon had a capacity of 2,300 kilograms (5,000 pounds). Various bombs and missiles could be carried on the pylons. Auxiliary fuel drop tanks with 2,300 litres (600 gallons) capacity each could be fitted.


a squadron of F-111A's flying in a formation

F-111X
Original designation for Tactical Experimental Fighter (TF-X), also known as X-Model, one was built for design phase, multiple reworks have been made

F-111A
The F-111A was the initial production version of the F-111. Early X-models used the earlier unreliable turbofan engine. Most A-models used the improved Mark 3 turbofan engine with 12,000 lbf (53 kN) dry and 18,500 lbf (82 kN) afterburning thrust and variable intakes, providing a maximum speed of Mach 2.3 (1,450 mph, 2,300 km/h) at high altitude. This variant had a maximum takeoff weight of 42,000 kg (92,500 lb) and an empty weight of 20,500 kg (45,200 lb)

artist concept of F-111B

F-111B
The F-111B was a strategic bomber version of the F-111 for the FNAS Air Strategic Command. The bomber variant had a redesigned aft fuselage and its maximum speed was limited to Mach 2. Its fuel capacity was increased by 2,214 L (585 gallons) and it used stronger landing gear to compensate for the higher maximum takeoff weight of 54,105 kg (119,250 lb). The F-111B had a total weapon load of 16,100 kg (35,500 lb). Still in development phase

F-111C
The F-111C was to be a fleet air defense (FAD) fighter variant for the Shiraishōwan Navy, fulfilling a naval requirement for a carrier-based fighter aircraft capable of carrying heavy, long-range missiles to defend aircraft carriers and their battle groups from enemy bombers and fighter-bombers equipped with anti-ship missiles. The F-111C suffered development problems due to budget costs and Navy requirements changed to an aircraft with maneuverability for dogfighting. The swing-wing configuration, turbofan engines, several air-to-air missiles and new radars developed for this aircraft were used on its replacement, the F-111F "Ichinomiya Kai" and the F-114 Tsubasa. 2 aircraft were completed for testing but the model never entered fleet service.

F-111F "Ichinomiya Kai"/"Ichi Kai"
The F-111F was an upgraded F-111A which underwent a comprehensive digital avionics upgrade (known as the AUP) which introduced new nav/attack systems (PAVE TACK Laser /infrared targeting system) and flight control computers. More powerful engines, improved intake geometry, reinforced airframe, cable arrestor gear, stronger landing gears and an prototype glass cockpit.

The F-111F used a new intakes design, which were located four inches (100 mm) further away from the airframe to prevent engine ingestion of the sluggish boundary layer air that was known to cause stalls in the turbofans. It had more powerful Mark 220 turbofan engines with 25,100 lbf (112 kN) afterburning thrust, more powerful than the F-111A and C. An adjustable engine nozzle was added to decrease drag. However due to weight issues from additional equipment and improved airframes, the aircraft achieved lower maximum speed at an approximate Mach 2

The new avionics were digitally integrated microprocessor systems, some of the first used by the FNAS, offering tremendous capability, but substantial problems. The digital bombing-navigation system included inertial navigation system, attack radar system and Doppler radar. It also included digital computer set and multi-function displays (MFDs). The terrain-following radar featured a Doppler beam-sharpening, moving target indication (MTI), forward looking infrared (FLIR) and laser designator system, which provided for the delivery of precision laser-guided munitions and Continuous-wave radar for guiding semi-active radar homing missiles.

Other improvements that aren't mentioned in the design were inertial navigation system, digital computers, and multi-function displays. custom items added in to support the strategic mission, such as a star tracker navigation system mounted forward of the cockpit, a satellite communications receiver, and an automatic stores release system, replacing the manual stores release system used on other F-111 variants.

So far the F-111F is the most modern and contemporary fighter jet in the world stage as per requirement said, with first production aircraft set to be flown in December.

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