Ki-61-Ib Hien

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General info

An American-captured Ki-61-Ib Hien in the Garage.

The ✪ Ki-61-Ib Hien is a premium Rank II American fighter with a battle rating of 2.3 (AB), 3.3 (RB), and 3.0 (SB). It was in the game since the start of the Open Beta Test prior to Update 1.29. It costs 700 GE.

The main purpose, usage and tactics recommendations

Arcade Realistic Simulator

Arcade Realistic Simulator

Arcade Realistic Simulator


General play style

Unlike its more maneuverable and agile counterpart, the A6M Reisen, the Ki-61 is more of what one would call an "energy fighter". Compared to the "Zero" it is faster, has a higher climb rate, and handles better at higher speeds. This captured version of the Hien has exactly the same stats and armament as the Japanese version. Armed with four 12.7mm Ho-103 machine guns and plenty of ammunition, the Ki-61-Ib is a more than capable fighter. As a continuation of the Japanese army tree, the Ki-61 is the successor of the earlier Ki-43 Hayabusa. The Hien is faster, has a higher rate of climb, and features a better armament. Utilize these three aspects when facing planes like the Ki-43. In realistic battles, one of the major advantages the Ki-61-Ib has is its climb rate. The stat card may be misleading, but this plane can reach altitudes no enemies will be close to (unless of course, the enemy is another Hien). This allows the Hien to choose when and where it wants to fight. Instead of simply "turning and burning" the Ki-61 is very good at energy fighting, or "boom and zoom". Once at a high altitude the Hien pilot may choose to dive lower to attack an enemy. If the enemy is not destroyed on the first pass, it is recommended to climb sharply and gain altitude. By doing this, the Hien sets itself up for another attack while not being in range of the enemy's guns.

Vehicle characteristics

The Ki-61's instrument panel.

The Ki-61-Ib utilized four 12.7mm Ho-103 Japanese machine guns. Generally they are unreliable and it often takes hundreds of rounds to destroy an enemy plane. This is due to the lack of primer in the rounds themselves. 12.7mm rounds fired by the M2 Browning may seem to do more damage because they have more primer which dictates how fast the round will exit the barrel. Due to this, it is necessary to get up close to enemies. Aim for the engine, pilot, or fuel tanks if the location is known. Remember to lead with these machine guns, as the rounds are not high velocity.

Tactics

The Hien is best utilized as a multi purpose fighter. Although proficient at energy fighting, the Ki-61 is also generally average at standard maneuvers. It may lose turn fights with some enemy aircraft like the A6M2 Reisen, but nonetheless it can still be used in multiple roles. The Hien is your standard "jack of all trades". It's not incredibly good at anything it does but it is even across the board. This allows the Hien pilot to choose what role he or she wants to play in the battle. One could play the reserved, high flying energy fighter, or the aggressive low flying dogfighter. The Ki-61 allows these choices.

Its armament is not so flexible, as the American captured version is unable to equip bombs or ground targets ammunition. Its weapons, four Ho-103 12.7mm machine guns, are considered by many to be unreliable and unwieldy. However, with accuracy and shot placement, the large ammunition pool can work to your advantage.

If caught in a sticky situation, the Hien pilot may choose to do several things. Depending on your altitude, executing a rolling scissors or an overshoot may be a valid tactic. try to make the enemy pilot feel pressured to disengage. Depending on the enemy's aircraft, use your speed to your advantage and try to get away. The most sure tactic would be communicating with teammates to ensure your assailant's death. Once tailed, the Hien pilot can "set up" an enemy by nosing up about 70 degrees so the entirety of the enemy plane is shown. At this stage, ideally your teammate is arriving to save the day.

Specific enemies worth noting

Counter-tactics

Pros and cons

Pros:

  • Generally performs well in all categories
  • Outstanding climb rate
  • Large amount of ammunition
  • Some armor protection

Cons:

  • Unreliable guns
  • Locks up at high speeds
  • No frontal armor
  • Average roll rate which worsens as speed increases
  • Cannot equip bombs

Specifications

Armaments

  • 2 x 12.7 mm Ho-103 machine gun, nose-mounted (400 rpg = 800 total)
  • 2 x 12.7 mm Ho-103 machine gun, wing-mounted (500 rpg = 1,000 total)

Ho103

Ho103

Ho-103

Pros

Cons


Engine & mobility

Arcade Realistic Simulator

Arcade Realistic Simulator

Arcade Realistic Simulator


Engine

Name: Kawasaki Ha-40 12-cylinder inline
  • Cooling type: Water
  • Max power: 940 hp (Stock), ____ hp (Upgraded)
  • Takeoff power: 1065 hp (Stock), ____ hp (Upgraded)
  • Mass: 590 kg
Name: Kawasaki Ha-40 12-cylinder inline
  • Cooling type: Water
  • Max power: 930 hp (Stock), ____ hp (Upgraded)
  • Takeoff power: 1054 hp (Stock), ____ hp (Upgraded)
  • Mass: 590 kg
Name: Kawasaki Ha-40 12-cylinder inline
  • Cooling type: Water
  • Max power: 930 hp (Stock), ____ hp (Upgraded)
  • Takeoff power: 1054 hp (Stock), ____ hp (Upgraded)
  • Mass: 590 kg

Stats

Stock
  • Max speed: 563 km/h
    • at height: 5,000 m
  • Max altitude: 10,000 m
  • Turn Time: 21.2 s
  • Rate of Climb: 6.1 m/s
  • Takeoff run: 420 m

Upgraded

  • Max speed: ___ km/h
    • at height: 5,000 m
  • Max altitude: 10,000 m
  • Turn Time: __._ s
  • Rate of Climb: _._ m/s
  • Takeoff run: 420 m
Stock
  • Max speed: 552 km/h
    • at height: 5,000 m
  • Max altitude: 10,000 m
  • Turn Time: 21.7 s
  • Rate of Climb: 8.0 m/s
  • Takeoff run: 420 m

Upgraded

  • Max speed: ___ km/h
    • at height: 5,000 m
  • Max altitude: 10,000 m
  • Turn Time: __._ s
  • Rate of Climb: _._ m/s
  • Takeoff run: 420 m
Stock
  • Max speed: 552 km/h
    • at height: 5,000 m
  • Max altitude: 10,000 m
  • Turn Time: 21.7 s
  • Rate of Climb: 8.0 m/s
  • Takeoff run: 420 m

Upgraded

  • Max speed: ___ km/h
    • at height: 5,000 m
  • Max altitude: 10,000 m
  • Turn Time: __._ s
  • Rate of Climb: _._ m/s
  • Takeoff run: 420 m

Performance

Warning this is still in the test phase and is probably incorrect. Take information with a grain of salt (data taken from 1.55)



0
1
2
3
4
5
6
7
8
9
10
0
0.28
0.56
0.84
1.12
1.4
Horsepower in 1000hp
Altitude in 1000m

Supercharger Stage #1: 100%

Supercharger Stage #1: WEP



Modules and improvements

This premium aircraft comes furnished with all modifications unlocked upon purchase.

History of creation and combat usage

In December 1943, the US Marine Corps landed at Cape Gloucester on the island of New Britain. After capturing the temporary Japanese airfield, the Marine Corps discovered a hidden Ki-61 Model 1Ko fighter (serial number 263) from the 68th Sentai produced in April 1943.

The aircraft had been abandoned by the Japanese due to a number of engine malfunctions which were not repairable in the field. The aircraft was meticulously inspected by officers of the US Army's Technical Intelligence and sent to Australia, where it was restored to airworthy condition and had USAAF markings applied to it. This is the aircraft we currently see in-game.

Ingame description

Kawasaki Ki-61 Hien Army Type 3 Model 1Ko (NATO reporting name: Tony) single-engine army fighter


An all-metal monoplane with an enclosed cockpit and a retractable landing gear system, including tail wheel. It was created by the design bureau of Kawasaki Company, under the direction of Takeo Doi.
The aircraft had as its power unit a German-licensed Daimler-Benz DB 601Aa twelve-cylinder, liquid-cooled engine manufactured by Kawasaki Company under the designation of Ha-40.
A Ki-61 prototype got off the ground for the first time in December 1941. Full-scale production started in the summer of 1942. The aircraft was accepted for service with the Imperial Japanese Army Air Force as the Type 3 Hien ("Swallow") fighter in the spring of 1943. The Hien's combat deployment began in June 1943, on New Guinea.
The Ki-61 became one of few Japanese production planes equipped with liquid-cooled engines. The Hien stood out so much in its appearance and high flight characteristics among Japanese fighters of that period of the war that the Americans at first refused to identify it as a Japanese design.
After receiving the first reports about the new Japanese fighter with a liquid-cooled engine, the American intelligence service considered it a licensed replica of the German Messerschmitt Bf 109E fighter, so Mike was chosen as its NATO reporting name. However, after a more detailed study of pilot reports, intelligence analysts concluded that the new fighter was more similar to the Italian MC.202 Folgore. Thus, the Americans chose an Italian NATO reporting name, Tony, for the new Japanese fighter.
In December 1943, the US Marine Corps landed at Cape Gloucester on the island of New Britain. After capturing the temporary Japanese airfield, the Marine Corps discovered a hidden Ki-61 Model 1Ko fighter (serial number 263) from the 68th Sentai produced in April 1943.
The aircraft had been abandoned by the Japanese due to a number of engine malfunctions which were not repairable in the field. The aircraft was meticulously inspected by officers of the US Army's Technical Intelligence and sent to Australia, where it was restored to airworthy condition and had USAAF markings applied to it. Later, the Hien was thoroughly tested in the Technical Air Intelligence Center at NAS Anacostia.

It was noted in the report on the test results that the aircraft was exceptionally easy to pilot and that it behaved well practically in all modes of flight and during all manoeuvres, so it represented quite a formidable weapon in the hands of a sufficiently qualified pilot.

Screenshots and fan art

Skins and camouflages for the Ki-61-Ib from live.warthunder.com.

Additional information (links)

References


Horsepower graphSidebar

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ki_61_1a_otsu_usa.png

Ki-61-I otsu
Nation Japan
Type Fighter
Fighting style Energy Fighting
Turn Fighting

   Metric✓       Imperial   

   Metric       Imperial✓   

Characteristics
Empty Weight ~2377 kg
Empty Weight + fuel ~2791 kg
Takeoff Weight ~2950 kg
Wing Area ~20 m²
# Flap Positions 3
Number of Engines 1
Air Breaks no
Arrestor Gear no
Statistics
Power per Engine 1030 hp
WEP Duration infinite
top speed ~592.00 kph at 5000 m
Climb Rate ~11.00 m/s
Optimal climb velocity ~248.85 kph
Turn Time ~20.74 s
Wing loading (Empty) ~119.00 kg/m²
Characteristics
Empty Weight ~5240 lb
Empty Weight + fuel ~6153 lb
Takeoff Weight ~6504 lb
Wing Area ~215 ft²
# Flap Positions 3
Number of Engines 1
Air Breaks no
Arrestor Gear no
Statistics
Power per Engine 1030 hp
WEP Duration infinite
Top speed ~367.85 mph at 16404 m
Climb Rate 36.09 ft/s
Optimal climb velocity ~154.63 mph
Turn Time 20.74 s
Wing loading (Empty) ~24.37 lb/ft²
Main Weapons
2 x Ho-103 400 RPG
2 x Ho-103 500 RPG
Limits
Max Speed limit 760 kph
Gear lmit 330 kph
Combat Flaps 500 kph
Max static +G's ~16
Max static -G's ~12
Optimal Velocities
Ailerons <360 kph
Rudder <350 kph
Elevators <460 kph
Radiator >270 kph
Limits
Max Speed limit 472 mph
Gear lmit 205 mph
Combat Flaps 311 mph
Max static +G's ~16
Max static -G's ~12
Optimal Velocities
Ailerons <224 mph
Rudder <217 mph
Elevators <286 mph
Radiator >168 mph
Manual Control
Mixer is not controllable
Pitch is controllable
no automatic pitch
Radiator (water) is controllable
Radiator (oil) is not controllable
Oil and water uses combined radiator control
Supercharger is not controllable
Turbocharger is not controllable
Compressor settings 1
Optimal Altitude
3450 m
11319 ft
100% Enginepower 1100 hp
WEP Enginepower 1232 hp
* Warning this is still in the test phase and can be incorrect. Take information with a grain of salt (data from 1.57 initial release)