View source for Ki-45 otsu

{{About
| about = Japanese twin-engine fighter '''{{PAGENAME}}'''
| usage = other versions
| link = Ki-45 (Family)
}}
{{Specs-Card
|code=ki-45_otsu
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.jpg}}
}}

== Description ==
<!-- ''In the description, the first part should be about the history of and the creation and combat usage of the aircraft, as well as its key features. In the second part, tell the reader about the aircraft in the game. Insert a screenshot of the vehicle, so that if the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle the article is talking about.'' -->
The '''{{Specs|name}}''' was the successor of the Ki-45 "ko/甲" and another member of the Ki-45 series of twin engine fighter/striker aircrafts. This variant of the Ki-45 was supposed to engage armoured targets, armed with a 37mm cannon on the belly replacing the Ho-3 20mm cannon found on the Ki-45 ko. The aircraft was used by the army to engage fortifications and armoured vehicles mainly those used by the Chinese during the II Sino-Japanese War. The aircrafts usage against naval assets was also explored and this came on the form of the Ki-45 hei/丙, its successor, designed to engage naval objectives with a 37mm cannon.

It was introduced in [[Update 1.31]]. Being a classed as a heavy fighter, the Ki-45 isn't the best in the manoeuvrability department. However, for a heavy fighter, it manoeuvres very well. It is even capable of out-turning aircraft such as the [[P-47D-25]]. Unlike heavy fighters of other nations, the Ki-45 series does not feature aircraft with large amounts of heavy weaponry. This is a major downside, considering how heavy fighters traditionally give up manoeuvrability and speed for armament. Instead, the Ki-45s utilise more of a balance between manoeuvrability, speed, and armament. These are what makes the Ki-45 both a capable dogfighter, and bomber hunter.

== General info ==
=== Flight performance ===
{{Specs-Avia-Flight}}
<!-- ''Describe how the aircraft behaves in the air. Speed, manoeuvrability, acceleration and allowable loads - these are the most important characteristics of the vehicle.'' -->

{| class="wikitable" style="text-align:center" width="70%"
! rowspan="2" | Characteristics
! colspan="2" | Max Speed<br>(km/h at 6,300 m)
! rowspan="2" | Max altitude<br>(metres)
! colspan="2" | Turn time<br>(seconds)
! colspan="2" | Rate of climb<br>(metres/second)
! rowspan="2" | Take-off run<br>(metres)
|-
! AB !! RB !! AB !! RB !! AB !! RB
|-
! Stock
| 551 || 533 || rowspan="2" | {{Specs|ceiling}} || 24.9 || 25.5 || 16.4 || 16.4 || rowspan="2" | 520
|-
! Upgraded
| 593 || 570 || 23.2 || 24.0 || 23.1 || 19.5
|-
|}

==== Details ====
{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="5" | Features
|-
! Combat flaps !! Take-off flaps !! Landing flaps !! Air brakes !! Arrestor gear
|-
| ✓ || ✓ || ✓ || X || X     <!-- ✓ -->
|-
|}

{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="7" | Limits
|-
! rowspan="2" | Wings (km/h)
! rowspan="2" | Gear (km/h)
! colspan="3" | Flaps (km/h)
! colspan="2" | Max Static G
|-
! Combat !! Take-off !! Landing !! + !! -
|-
| {{Specs|destruction|body}} || {{Specs|destruction|gear}} || 450 || 444 || 308 || ~11 || ~7
|-
|}

{| class="wikitable" style="text-align:center"
|-
! colspan="4" | Optimal velocities (km/h)
|-
! Ailerons !! Rudder !! Elevators !! Radiator
|-
| < 360 || < 320 || < 450 || > 330
|-
|}

=== Survivability and armour ===
{{Specs-Avia-Armour}}
<!-- ''Examine the survivability of the aircraft. Note how vulnerable the structure is and how secure the pilot is, whether the fuel tanks are armoured, etc. Describe the armour, if there is any, and also mention the vulnerability of other critical aircraft systems.'' -->

* 16 mm Steel plates behind the pilot

=== Modifications and economy ===
{{Specs-Economy}}

Instead of focusing on armament like other heavy fighters, the Ki-45 is more balanced between armament and flight performance. While the default ammunition belts for both weapons on the Ki-45 ko are workable, it can help to upgrade. Unlocking the flight performance modules will help drastically in dogfights and turn fights.

== Armaments ==
{{Specs-Avia-Armaments}}
=== Offensive armament ===
{{Specs-Avia-Offensive}}
<!-- ''Describe the offensive armament of the aircraft, if any. Describe how effective the cannons and machine guns are in a battle, and also what belts or drums are better to use. If there is no offensive weaponry, delete this subsection.'' -->
{{main|Type 94 (37 mm)|Ho-103 (12.7 mm)}}

The '''''{{PAGENAME}}''''' is armed with:

* 1 x 37 mm Type 94 cannon, belly-mounted (16 rpg)
* 2 x 12.7 mm Ho-103 machine guns, nose-mounted (350 rpg = 700 total)

=== Defensive armament ===
{{Specs-Avia-Defensive}}
<!-- ''Defensive armament with turret machine guns or cannons, crewed by gunners. Examine the number of gunners and what belts or drums are better to use. If defensive weaponry is not available, remove this subsection.'' -->
{{main|Type 98 (7.92 mm)}}

The '''''{{PAGENAME}}''''' is defended by:

* 1 x 7.92 mm Type 98 machine gun, dorsal turret (1,050 rpg)

== Usage in battles ==
<!-- ''Describe the tactics of playing in the aircraft, the features of using aircraft in a team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view, but instead, give the reader food for thought. Examine the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).'' -->
This variant of the Ki-45, the Ki-45 otsu, features the first "hard-hitting" armament of the series. Wielding two Ho-103 12.7 mm guns and one 37 mm Type 94 cannon, the Ki-45 otsu is the pinnacle of a multi-purpose aircraft. Its 37 mm cannon allows it to take down bombers with ease, and its nose-mounted 12.7 mm guns allows for some flexibility in the dogfighting department. Although deadly, the 37 mm cannon only holds 16 rounds, so shot placement is crucial. The round itself also travels fairly slowly in the air, making it hard to hit fast moving enemy fighters. The 12.7 mm guns is best used in an anti-fighter role. Fortunately, the Ki-45 otsu can also be used in an anti-tank role, thanks to the AP rounds for the 37 mm cannon (42 mm penetration), which can take out light and medium tanks, light pillboxes, and even a few player controlled tanks. The Ki-45 is unable to equip bombs.

The Ki-45 otsu also retains its impressive turn rate from the [[Ki-45 ko]]. Although the aircraft itself is large and presents an "easy target" in many players' minds, the Ki-45 is rather nimble. Use this to your advantage when engaging enemy aircraft. Unfortunately, the Ki-45 is a heavy fighter, meaning its turn time is still not on par with other aircraft such as the [[F2A-3]]. In certain cases, the Ki-45 pilot may have to rely on his or her tail gunner to get the job done. The "otsu" version of the Ki-45 features a 7.92 mm Type 98 machine gun with 1,050 rounds. Although lacklustre, with shot placement it is possible to destroy enemies on the aircraft's tail. Aim for the pilot or the engine, as those are generally the weakest points on most aircraft. If the tailing enemy is a biplane, aim for the wings since they are very fragile.

The Toryu is also rather fragile for a heavy fighter. Although it does feature two engines, the Ki-45 does not have very much armour protection. Only the back of the pilot's seat has armour, leaving both the gunner and engines unprotected. This can prove costly in a fight. If one does find him or herself tailed, call upon teammates for assistance.

* In simulator, the Ki-45 has a decent frontal view with large pieces of glass in front, on top and to the sides, ensuring great visibility. The gunsight has enough room under, allowing easy tracking and leading of targets. However the side views are terrible as the wings & engines block out most of the view downwards, and a thick frame blocks out the upper area, as a result the common way of circling above an area to spot something is extremely limited. Rear visibility is almost non existent with the entire tail obstructed by the headset.

=== Manual Engine Control ===
{| class="wikitable" style="text-align:center"
|-
! colspan="7" | MEC elements
|-
! rowspan="2" | Mixer
! rowspan="2" | Pitch
! colspan="3" | Radiator
! rowspan="2" | Supercharger
! rowspan="2" | Turbocharger
|-
! Oil !! Water !! Type
|-
| Controllable || Controllable<br>Not auto controlled || Controllable<br>Auto control available || Controllable<br>Auto control available || Separate || Controllable<br>2 gears || Not controllable
|-
|}

=== Pros and cons ===
<!-- ''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".'' -->

'''Pros:'''

* Highly powerful 37 mm cannon
* Armour piercing (42 mm penetration) shots for anti-tank purposes
* Good manoeuvrability and climb rate for a heavy fighter
* Acceptable top speed
* 16.5 mm of armour in pilot's seat
* Two engine design

'''Cons:'''

* Beat in turn fights by some aircraft
* Prone to fuel and engine fires
* Locks up at high speeds
* Mediocre roll rate, gets worse as speed increases
* Limited ammunition for all weapons
* Lack of protection around fuel tanks, engines, and gunner
* Long cannon reload
* Pilot is exposed in head-ons

== History ==
<!-- ''Describe the history of the creation and combat usage of the aircraft in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
Initially designed to be a bomber escort, the Ki-45 was first deployed in what is now China and Vietnam. It was found to be easily outclassed by P-40s piloted by the Flying Tigers. As a result, the Ki-45's role was changed to anti-shipping and ground attack, where it performed satisfactorily. Nonetheless, the Ki-45's greatest strength proved to be its bomber intercepting capabilities. Heavily armed with 37 mm cannon, the Toryu (Dragon Slayer) could destroy heavy bombers with ease. As the war progressed, the need for an interceptor to defend the Japanese mainland was ever present. Soon, the Ki-45 was deployed to counter B-29 Superfortress raids. Although its armament was clearly deadly enough, the Ki-45 suffered at high altitudes. Pilots soon resorted to ramming attacks against the Superfortresses. Special attack groups specifically designed for this purpose formed, but by late 1945 Imperial Japan's fate had been sealed. The Allies allocated the name "Nick" to the Ki-45.

{{break}}
{{Navigation-Start|{{Annotation|Archive of the in-game description|An archive of the historical description of the vehicle that was presented in-game prior to Update 1.55 'Royal Armour'}}}}
{{Navigation-First-Simple-Line}}
Kawasaki Ki-45 KAI Otsu (Model B) Type 2 Toryu (Allied reporting name: Nick) twin-engine army fighter

Combat experience showed that the Toryu was particularly good as a ground-attack aircraft for striking ground and surface targets. In order to improve the effective use of the Ki-45 for anti-ship and ground attack tasks, the special Ki-45 KAI Otsu version was launched into full-scale production.

Aircraft of this version were equipped with new Mitsubishi Ha-102 fourteen-cylinder, radial air-cooled engines producing a takeoff power of 1,080 hp. These engines were housed in nacelles which had a smaller diameter when compared to previous versions. The aircraft's flight characteristics remained unchanged, since the increased engine power was accompanied by a larger takeoff weight; however, the improved reliability of the Ha-102 engines was appreciated by flying and maintenance personnel.

The aircraft's armament was drastically reinforced. The nose-mounted 12.7 mm machine guns were replaced by one 20 mm Ho-3 cannon with 50 rounds. The ventral nacelle housed a 37 mm Type 94 manually loaded cannon with 16 rounds. The 7.92 mm Type 98 machine gun with 1,050 rounds remained in the rear defensive turret.

The installation of the new front armament meant changing the shape of the nose fairing, and additional access doors were cut in the skin. The landing headlight was moved from the nose section to the left wing leading edge.

The Ki-45 KAI Otsu was used extensively to attack various ground and surface targets.
{{Navigation-End}}

== Media ==
<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->

;Skins

* [https://live.warthunder.com/feed/camouflages/?vehicle=ki-45_otsu Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]

== 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.'' -->

;Related development

* [[Ki-45 (Family)]]

== External links ==
''Paste links to sources and external resources, such as:''

* ''topic on the official game forum;''
* ''other literature.''

{{AirManufacturer Kawasaki}}
{{Japan twin-engine fighters and attackers}}