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Revision as of 13:01, 18 February 2021
| This page is about the Swedish fighter J21A-2. For other versions, see J21 (Family). |
Contents
Description
The J21A-2 is a rank IV Swedish fighter with a battle rating of 5.3 (AB), 4.3 (RB), and 3.7 (SB). It was introduced in Update 1.95 "Northern Wind".
General info
Flight performance
| Characteristics | Max Speed (km/h at 4,300 m) |
Max altitude (metres) |
Turn time (seconds) |
Rate of climb (metres/second) |
Take-off run (metres) | |||
|---|---|---|---|---|---|---|---|---|
| AB | RB | AB | RB | AB | RB | |||
| Stock | 616 | 599 | 10800 | 21.0 | 21.9 | 12.6 | 12.6 | 300 |
| Upgraded | 666 | 640 | 19.0 | 20.0 | 19.0 | 15.5 | ||
Details
| Features | ||||
|---|---|---|---|---|
| Combat flaps | Take-off flaps | Landing flaps | Air brakes | Arrestor gear |
| ✓ | ✓ | ✓ | X | X |
| Limits | ||||||
|---|---|---|---|---|---|---|
| Wings (km/h) | Gear (km/h) | Flaps (km/h) | Max Static G | |||
| Combat | Take-off | Landing | + | - | ||
| 683 | 325 | 445 | 425 | 325 | ~11 | ~5 |
| Optimal velocities (km/h) | |||
|---|---|---|---|
| Ailerons | Rudder | Elevators | Radiator |
| < 450 | < 390 | < 420 | > 715 |
Survivability and armour
- 10 mm steel - Firewall armour plate
- 10 mm steel - Firewall cover armour plate
- 10 mm steel - Pilot's back armour plate
- 60 mm bulletproof glass
Modifications and economy
| Flight performance | Survivability | Weaponry | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
Armaments
Offensive armament
The J21A-2 is armed with:
- 1 x 20 mm Akan m/45 cannon, nose-mounted (140 rpg)
- 2 x 13.2 mm Akan m/39A machine guns, nose-mounted (350 rpg = 700 total)
- 2 x 13.2 mm Akan m/39A machine guns, wing-mounted (325 rpg = 650 total)
Usage in battles
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.
Overall, the J21A was designed (and should be used) as an interceptor. One excellent tactic is to climb at about 20 degrees until reaching 4000-5000 meters 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 2000-3000 meters 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.
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.
Manual Engine Control
| MEC elements | ||||||
|---|---|---|---|---|---|---|
| Mixer | Pitch | Radiator | Supercharger | Turbocharger | ||
| Oil | Water | Type | ||||
| Not controllable | Controllable Auto control available |
Controllable Auto control available |
Controllable Auto control available |
Separate | Not controllable 1 gear |
Not controllable |
Pros and cons
Pros:
- Very stable, does not stall in level flight even with the throttle set to zero
- Retains controllability at all speeds, even when stalling
- Engine protected from head-on attacks
- Most armament is nose-mounted
- Heavy armament with excellent ammunition belts
Cons:
- Pusher aircraft, engine mounted facing rear, exposed to enemy aircraft which may follow
- Required to set convergence due to wing-mounted machine guns
- Loses speed rapidly in sharp turns
- Long weapon reload time (in AB)
- High repair cost
- Has one of the most expensive aircraft to repair in AB at ~19 K Silver Lions
- 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).
Media
Excellent additions to the article would be video guides, screenshots from the game, and photos.
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.
External links
| Swedish Aeroplane Company Ltd. (SAAB) | |
|---|---|
| Pre-SAAB: SA / ASJA | |
| SA 'Jaktfalken' | J6B |
| SAAB 17 | B17A · B17B · S17BS |
| SAAB 18 | B18A · B18B · T18B · T18B (57) |
| SAAB 21 | J21A-1 · J21A-2 · A21A-3 · J21RA · A21RB |
| SAAB 29 'Tunnan' | J29A · A29B · J29D · J29F |
| SAAB 32 'Lansen' | J32B · A32A · A32A Röd Adam |
| SAAB 35 'Draken' | J35A · J35D |
| SAAB 37 'Viggen' | JA37C · JA37D · JA37DI · JA37DI F21 · AJ37 · AJS37 |
| SAAB 39 'Gripen' | JAS39A · JAS39C |
| SAAB 105 | SK60B · SAAB-105G |
| License Production | B3C (Ju 86K) |
| Export | SAAB-105OE · J35XS · ▄JAS39C · ◔JAS39EBS HU C |
| Sweden fighters | |
|---|---|
| ASJA | J6B |
| Saab | J21A-1 · J21A-2 · A21A-3 |
| FFVS | J22-A · J22-B |
| Foreign Import | J8A · Iacobi's J8A · J9 Early · J11 · J20 · J26 David · J26 |
| Finland | |
| VL | Mörkö-Morane · VL Myrsky II · VL Pyörremyrsky |
| (NL) Fokker | ▄Fokker D.XXI-3 · ▄Fokker D.XXI |
| (DE) Messerschmitt | ▄Bf 109 G-2 · ▄Bf 109 G-6 Erla · ▄Bf 109 G-6 |
| Other | ▄B-239 · ▄Hurricane Mk I/L |
