Nakajima Ki-84 definition and explanation


Nakajima Ki-84-Ia Military aircraft silhouette Ki-84-1.jpg Aircraft manufacturer’s view Japan Nakajima Hikoki Kabushiki Gaisha Role Fighter (A fighter plane (also called a fighter jet) is a military aircraft designed to attack…) The first flight (The first flight or the first flight of an airplane is the first opportunity for it to make…) April 1943 Number (The concept of number in linguistics is considered in the article “Number…”) 3514 people built Crew 1 driver Engine Engine (A motor is a device that converts non-mechanical energy (wind, chemical, etc.) Nakajima [Ha-45] 12 Number 1 Type 18 cylinder double star (A star is a celestial object that autonomously emits light, like…) cools down air (Air is a mixture of gases that make up the Earth’s atmosphere. It is odorless and…) Powerful (The word strength is used in several areas with special meaning:) unit 1825 hp on the ground dimensions (In common sense, the concept of dimension refers to the size; the dimensions of the room …) wingspan (Wingspan is the distance between the tips of the wings. The term is valid for…) 11.328 m Length (The length of an object is the distance between its two farthest ends…) 9.92 m Height (Height has several meanings depending on the subject area.) 3.385 m Surface (Surface usually refers to the surface layer of an object. The term is…) wing 21 m² Weight А empty (Void is usually defined as the absence of matter in the spatial domain.) 2660 kg Maximum 3613 kg Speed (We distinguish:) maximum 631 km/h Ceiling (Also, the ceiling represents the maximum of something :) 10 500 m Range 1685 km Armament Interior (In France, this name refers to a doctor, pharmacist or dental surgeon in …) 2 machine guns Ho-103 12.7mm in nose (Nose (from the Latin nasus) – a person has a median projection of the face, located above …)2 guns Ho-5 20mm in wings Outer 2 bombs 250 kg or 2 tanks 200 liters edit

in Nakajima Ki-84 Hayate (“The Tempest”), referred to as “Frank” in the Allied code, proved to be a formidable opponent even for the best American hunters. However, it appeared too late and in too small numbers to allow Japan to resume the war. skill (A master’s degree is a university degree or diploma corresponding to a degree or title…) from sky (The sky is the Earth’s atmosphere as seen from the earth of the planet.) allies.

History in detail


The genesis of the Ki-84 began in all (The whole, understood as the whole of being, is often interpreted as the world or…) the beginning of the war. The Army asked Nakajima to develop a successor to the Ki-43 Hayabusa but more versatile than the Ki-44, which was a pure interceptor. The aircraft had to have a relatively ideal profile: range, versatility, maneuverability… top speed: 640 km/h. 680 km/hautonomy1:30 am to fight power and 400 km from base. in engine (Motor (from the Latin mōtor: “one who moves”) – a device …) was to be the new Nakajima Ha-45 (Navy Homare Engine) 1800 hp 18-cylinder two-star air-cooled compact engine.2000 hp. Armament was to be 2 guns 20mm Ho-5 and two machine guns 12.7mm Ho-103. In addition, the fighter had to be equipped with armor and self-sealing tanks.

Nakajima began research in early 1943, and in March 1943 the first prototype left the factory. It was a standard aircraft, with a low wing and, as is often the case in the production of Nakajima (Ki-43, Ki-44), the plan horizontal (Horizontal is the orientation parallel to the horizon and perpendicular…) placed in front of the daggerboard. The guns were mounted in the wings, and the machine guns in the engine hood. Combat shields were mounted under the wings, which is a common practice among Japanese aircraft manufacturers (Ki-44, J2M2, N1K1-J, Ki-43).

Engine [Ha-45] 11 of 1800 hp was associated with great spiral (Propeller comes from the Greek word helix meaning “spiral”. An object shaped…) four blades at constant speed. The prototype took to the air in April 1943. Development continued without any problems. Aircraft was born well, but performance was resigned compared to requirements Characteristics (A specification is a document intended to exhaustively define the main specifications…) (624 km/h). This remains the best performance for a Japanese device of that era.

A preliminary series of 83 pieces was made and extensively tested. Minor improvements appeared, some invisible: rationalization of production, others not: exhaust pipes, two attachment points under the wings instead of one, etc.


Because the aircraft was airworthy, it entered production as the Type 4 Model 1a (四式戦闘機) single-seat military fighter. But we will keep the name Ki-84-Ia Hayate (疾風: wind (Wind is the movement of the atmosphere, the mass of gas on the surface…) cruel).

The mechanics used was to slowly build up power: first [Ha-45] 11 of 1800 hp to separation (Takeoff is a transitional phase during which the aircraft exits the state of…)then [Ha-45] 12 of 1825 hpthen [Ha-45] 21 of 1990 hp (as on N1K2-J). The first production Ki-84-Ia saw action in the first combat with the 22nd Sentai in China. The Americans quickly realized that they were dealing with a new very powerful machine, the most powerful with which they had to fight. But it’s in Philippines (The Republic of the Philippines is a country made up of an archipelago…) that the Ki-84 was about to make its real debut.

However, it was too late for the Japanese, and the Ki-84s were destroyed as they were used in defense against much more numerous enemies. In addition, the devices suffered from recurring issues with train (A train is a controlled vehicle moving on rails. A train consists of…) landing, hydraulics and especially the engine.

In reality, the Nakajima Ha-45 never reaches its target. degree (The word degree has several meanings, especially it is used in fields…) from reliability (A system is reliable when the probability of completing its mission within a certain period of time…) sufficient. build quality and materials (Material is a material of natural or artificial origin, to which a person shapes …) fell to the last month (Month (from Latin mensis “month”, and earlier in the plural “menstruation”) – a period of time …) conflict.

Improved version of the engine [Ha-45] 23 extrapolated from model 21 and using injection (The word injection can have several meanings:) from fuel (Fuel is the fuel that powers the heat engine. It transforms…) short pressure (Pressure is a fundamental physical concept. You can think of it as a force applied…), the problems associated with a sharp drop in fuel pressure have been solved. However, engines were in short supply, the main plant was destroyed by B-29 bombing, and production in the underground factories started very slowly.


Ki-84-Ib was quickly replaced by chain (The word chain can have several meanings:) model -Ia. Armament switched to 4 guns 20mmtwo hooded machine guns are replaced by two Ho-5 cannons 20mm like the wings.


To combat bombers there was a version -Ic. developed (In geometry, the evolute of a plane curve is the locus of its centers…) by replacing the wing guns on the Ib with the Ho-105 from 30mm.

Ki-84-II, KAI or -I of the second series

To compensate for the lack of “strategic” materials, like the Germans on the Bf 109K, Nakajima built a Ki-84 KAI (modified) with a rear fuselage (The fuselage refers to the shell of an aircraft that normally bears the load…) and wooden wingtips. These aircraft used the same engines as the versions in aluminum (Aluminum is a chemical element, symbol Al and atomic number 13….). Although Nakajima named it Ki-84-II, it is officially airplane (Aircraft, according to the official definition of the International Civil Aviation Organization…) bore the same name as its predecessors (Ki-84-Ib and -Ic for armament).


high version height (Height is the vertical height of a place or object relative to the level…) A fighter powered by a turbocharged Ha-45 Ru engine was planned, but no prototype was built. The Japanese did not master turbochargers well.

In line with the policy of reducing amount (Quantity is a general metrology term (count, quantity); scalar,…) aluminum used in industry aeronautics (Aeronautics includes science and technology aimed at building and…)The Army commissioned Tachikawa to build an all-wooden version of the Ki-84. It was a Ki-106. Outwardly, it differed only in a larger drift. Armament was reduced to 2 guns to strengthen weight (Weight is the force of gravity of gravitational and inertial origin acting on…) and a relief program was underway, but the Americans produced and tested only 3 prototypes.

The high-altitude variant of the Ki-84N was to use the large Nakajima engine. [Ha-44] 13 (experimental designation: Ha-219) from 2500 hp. With more wing area, it should have been called the Ki-117. He did not exceed stadium (Stadium (from other Greek στ?διον stadion, from the verb …) research.

At the time of the surrender, a version of the Ki-84P with even larger wings was planned.

A less ambitious version of the Ki-84R with an engine [Ha-45] 44: three-stage compressor version [Ha-45] 23.

Prototype Ki-84 this time in become (Steel is a metal alloy used in construction…) was built: Ki-113. But given the weight, it was an immediate failure. The prototype didn’t even fly.

A more successful version was the Ki-116. Ki-84-I variant with smaller and lighter engine: Ha-112-II or [Ha-33] 62 and using a three-bladed propeller Ki-46. This 14 cylinder engine 1500 hp “only” was used with great success on the Ki-46-III, as well as on the Ki-100 and the A6M8 prototype. weight (The term mass is used to refer to two quantities attached to one…) decreased by 500 kg approximately, which compensated for the lower power. The capitulation prevented its commissioning.

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