J21A-2 - Revision history

U12017485: /* Pros and cons */ Merged with J21A-1 and updated

2024-11-06T22:32:45Z

‎Pros and cons: Merged with J21A-1 and updated

U142910694: /* Usage in battles */

2023-09-18T00:21:12Z

‎Usage in battles

U142910694: /* Usage in battles */

2023-09-18T00:15:53Z

‎Usage in battles

U38088265: /* Description */

2023-08-21T09:07:29Z

‎Description

U3243125: Added some to the description

2023-08-19T22:33:55Z

Added some to the description

U38088265: /* Pros and cons */

2023-07-02T12:07:37Z

‎Pros and cons

U115525686: /* Pros and cons */ Removed the AB silver lions con, as it is now 2.6k instead as the originally listed 19k.

2023-07-02T11:50:34Z

‎Pros and cons: Removed the AB silver lions con, as it is now 2.6k instead as the originally listed 19k.

U38088265: Reverted edits by U134445193 (talk) to last revision by U44629479

2023-01-21T17:24:52Z

Reverted edits by U134445193 (talk) to last revision by U44629479

U134445193: /* Flight performance */

2023-01-21T16:22:11Z

‎Flight performance

U44629479: Edits

2022-12-21T10:06:42Z

Edits

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 '''Pros:'''
-* Very stable, does not stall in level flight even with the throttle set to zero
+* Heavy armament with excellent ammunition belts, with most of it being nose-mounted
 * Retains controllability at all speeds, even when stalling
-* Engine protected from head-on attacks
+* Can pull high AoA for quick snapshots
 '''Cons:'''
-* Pusher aircraft, engine mounted facing rear, exposed to enemy aircraft which may follow
+* Loses energy rapidly in sharp turns
-* Required to set convergence due to wing-mounted machine guns
+* Engine overheats during takeoff and during flight at WEP even with full modifications
-* Loses speed rapidly in sharp turns
+* Very low rip speed - cannot push past 640 km/h (400 mph) without threatening to rip off wings
 == History ==

← Older revision		Revision as of 00:21, 18 September 2023
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	Although the J21 can be set on fire rather easily due to its centrally located fuel tank, it is often possible to put out the fire by diving very steeply and fast. This creates enough of a slipstream around the fuselage to often put out the fire.		Although the J21 can be set on fire rather easily due to its centrally located fuel tank, it is often possible to put out the fire by diving very steeply and fast. This creates enough of a slipstream around the fuselage to often put out the fire.
		+
		+	A enemy worth noting is the F-82E which is equipped with 6 12.7 mm M3 Browning machine guns which could provide a formidable foe that could take out the J21A quickly with just a few bursts, and its payload is superior to the J21 variants, which could result in a quick death when going head on with one.

	=== Manual Engine Control ===		=== Manual Engine Control ===

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 <!-- ''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).'' -->
-The J21A-2 (along with the rest of the J21A variants) is an excellent energy fighter. The plane retains and gains speed very well, as long as it is flying in a straight line. In level flight or in a dive, the J21A is very fast and can outrun most of its opponents. Additionally, it can manoeuvre quite well compared to some of its opponents but pilots must watch to ensure their speed does not drop too low as this makes the J21A an easy target. The nose-mounted armament makes it possible to successfully fight head-on with opponents and the 20 mm cannon is especially devastating when combined with the 13.2 mm machine guns. This armament also makes the J21A good as a bomber-interceptor since it can knock out critical components of an opponent's aircraft very quickly.
+The J21A-2 (along with the rest of the J21A variants) is an excellent energy fighter. The plane retains and gains speed very well, as long as it is flying in a straight line. In level flight or in a dive, the J21A is very fast and can outrun most of its opponents. Additionally, it can maneuver quite well compared to some of its opponents but pilots must watch to ensure their speed does not drop too low as this makes the J21A an easy target. The nose-mounted armament makes it possible to successfully fight head-on with opponents and the 20 mm cannon is especially devastating when combined with the 13.2 mm machine guns. This armament also makes the J21A good as a bomber-interceptor since it can knock out critical components of an opponent's aircraft very quickly.
 Overall, the J21A was designed (and should be used) as an interceptor. One excellent tactic is to climb at about 20 degrees until reaching 4,000-5,000 m and operating from that altitude in a boom-and-zoom role. This enables the J21A to use its excellent dive speed and heavy armament to maximum effect.
-Another effective tactic is to fly level and fast at medium altitude 2,000-3,000 m and act as a support fighter, assisting team mates who are overwhelmed by picking off some of their opponents in hit-and-run attacks. While the J21 can manoeuvre quite well (especially with combat flaps) it is not advisable to do this except as a last resort because the aircraft bleeds speed very rapidly. Also, this can expose the J21's engine (mounted in the rear of the aircraft) to and an enemy, allowing him the opportunity to knock out the J21's engine or hit its fuel tank (centrally located between the cockpit and the engine). This is another reason to avoid running away from an opponent, except when you can dive faster than the enemy or outclimb him. Many planes at the J21's level can keep up with it, although many also cannot. As long as you know your opponent and their capabilities, you can use the J21 very effectively.
+Another effective tactic is to fly level and fast at medium altitude 2,000-3,000 m and act as a support fighter, assisting team mates who are overwhelmed by picking off some of their opponents in hit-and-run attacks. While the J21 can maneuver quite well (especially with combat flaps) it is not advisable to do this except as a last resort because the aircraft bleeds speed very rapidly. Also, this can expose the J21's engine (mounted in the rear of the aircraft) to and an enemy, allowing him the opportunity to knock out the J21's engine or hit its fuel tank (centrally located between the cockpit and the engine). This is another reason to avoid running away from an opponent, except when you can dive faster than the enemy or outclimb him. Many planes at the J21's level can keep up with it, although many also cannot. As long as you know your opponent and their capabilities, you can use the J21 very effectively.
 Although the J21 can be set on fire rather easily due to its centrally located fuel tank, it is often possible to put out the fire by diving very steeply and fast. This creates enough of a slipstream around the fuselage to often put out the fire.

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 == 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}}''' is a rank {{Specs|rank}} Swedish fighter {{Battle-rating}}. It was introduced in [[Update 1.95 "Northern Wind"]].
+The J21A-2 was the second production series and an improved version of the [[J21A-1]] (though performance was improved, the J21 was still an obsolete aircraft at its time). The only differences between the A-1 and A-2 were a separated centre wing flap for the fuselage, and new cooling fins around the engine for the liquid and oil coolers.
-J21A-2 is the second production series and an improved version of the [[J21A-1]], where the J21 got an improved performance but still obsolete aircraft at its time. The only difference between the A-1 and A-2 is an separated center wing flap for the fuselage, The engine got modification for the cooling fins for the liquid and oil coolers.
+Introduced in [[Update 1.95 "Northern Wind"]], the J21A-2 has a similar playstyle as the [[J21A-1]] and keeps the similar firepower, except the 20 mm [[Akan m/41A (20 mm)|Akan m/41A]] has been replaced with a Bofors 20 mm [[Akan m/45 (20 mm)|Akan m/45]]. Due to the minimal changes, the J21A-2 keeps the same flight model and performance as the earlier version.
 == General info ==
@@ Line 186: / Line 184: @@
 * [[S.O.8000 Narval]]
 == External links ==

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 <!-- ''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}}''' is a rank {{Specs|rank}} Swedish fighter {{Battle-rating}}. It was introduced in [[Update 1.95 "Northern Wind"]].
 == General info ==

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 == General info ==
 === Flight performance ===
 {{Specs-Avia-Flight}}
 {| class="wikitable" style="text-align:center" width="70%"
@@ Line 74: / Line 74: @@
 === Survivability and 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.'' -->
 * 10 mm steel - Firewall armour plate
@@ Line 89: / Line 89: @@
 {{Specs-Avia-Armaments}}
 === Offensive armament ===
 <!-- ''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|Akan m/45 (20 mm)|Akan m/39A (13.2 mm)}}
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 * Long weapon reload time (in AB)
 * Water cooling system overheats fast on WEP
 == 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: https://wiki.warthunder.com/(Vehicle-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under === In-game description ===, also if applicable). -->
+<!-- ''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).'' -->
 The J21A-2 was a variant of the Saab 21, a twin-boom propeller fighter used by the Swedish air force. A unique design, it had a pusher-configuration engine and a twin-boom tail, giving it a very unique appearance. The J21A-2 was the second production variant of the J21 fighter, featuring a Swedish-built 20 mm cannon along with numerous other refinements. A total of 124 J-21A-2 aircraft were built in two batches; these aircraft served as the mainline Swedish fighter until the introduction of more capable jet-engined fighters.
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 The first of these aircraft, named J21A-1, entered service in 1945 with a total of 54 aircraft built. The J21A-2 was a later version that entered service in 1946-1947, with 66 aircraft built in two batches for a total of 124 aircraft. The J21A-2 featured numerous minor improvements compared to the J21A-1, including the installation of a Swedish 20 mm cannon and better avionics.
-The J21A-2 entered service in 1947, but had an extremely short service life. The aircraft's poor performance and relative obsolescence meant that it served for an extremely short time. The 124 aircraft built were quickly replaced by the more modern J29 Tunnan and British de Havilland Vampire, leading to the aircraft’s retirement by 1954. However, it is worth noting that SAAB also experimented with coupling a jet engine to the J21 airframe; this resulted in the A21RB, a unique aircraft coupling the J21's fuselage with a de Havilland Ghost engine. No J21A-2 airframes still exist but three J21A-3 aircraft still exist in museums today.
+The J21A-2 entered service in 1947, but had an extremely short service life. The aircraft's poor performance and relative obsolescence meant that it served for an extremely short time. The 124 aircraft built were quickly replaced by the more modern J29 Tunnan and British de Havilland Vampire, leading to the aircraft's retirement by 1954. However, it is worth noting that SAAB also experimented with coupling a jet engine to the J21 airframe; this resulted in the A21RB, a unique aircraft coupling the J21's fuselage with a de Havilland Ghost engine. No J21A-2 airframes still exist but three J21A-3 aircraft still exist in museums today.
 == Media ==
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 == See also ==
-<!--''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
+<!-- ''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.''-->
+* ''links to approximate analogues of other nations and research trees.'' -->
 ;Related Development
@@ Line 187: / Line 185: @@
 == External links ==
-<!--''Paste links to sources and external resources, such as:''
+<!-- ''Paste links to sources and external resources, such as:''
 * ''topic on the official game forum;''
-* ''other literature.''-->
+* ''other literature.'' -->
 * [https://forum.warthunder.com/index.php?/topic/474726-saab-j21a-1/ Official data sheet - more details about the performance]

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 |-
 ! Stock
-|800
+| 616 || 599 || rowspan="2" | {{Specs|ceiling}} || 21.0 || 21.9 || 12.6 || 12.6 || rowspan="2" | 300
 |-
 ! Upgraded

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 * 10 mm steel - Pilot's back armour plate
 * 60 mm bulletproof glass
+* Engine fire system (EFS)
 === Modifications and economy ===