J21RA

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VTOL | Rank 5 USA
AV-8A Harrier Pack
This page is about the Swedish jet fighter J21RA. For other versions, see J21 (Family).
J21RA
saab_j21ra.png
GarageImage J21RA.jpg
360://https://wiki.warthunder.com/images/c/c9/Cockpit_saab_j21ra.jpg
J21RA
AB RB SB
6.7 6.7 6.7
Research:92 000 Specs-Card-Exp.png
Purchase:370 000 Specs-Card-Lion.png
Show in game

Description

The J21RA is a rank V Swedish jet fighter with a battle rating of 6.7 (AB/RB/SB). It was introduced in Update 1.95 "Northern Wind".

General info

Flight performance

Air brakes
Allows you to dramatically reduce the flight speed by releasing special flaps
Max speed
at 4 000 m799 km/h
Turn time24 s
Max altitude12 192 m
EngineSvenska Flygmotor RM1
TypeJet
Cooling systemAir
Take-off weight5 t
Characteristics Max Speed
(km/h at 4,000 m)
Max altitude
(metres)
Turn time
(seconds)
Rate of climb
(metres/second)
Take-off run
(metres)
AB RB AB RB AB RB
Stock 763 744 12192 25.1 25.9 18.0 17.3 850
Upgraded 836 799 23.0 24.0 24.4 21.0

Details

Features
Combat flaps Take-off flaps Landing flaps Air brakes Arrestor gear Drogue chute
X X
Limits
Wings (km/h) Gear (km/h) Flaps (km/h) Max Static G
Combat Take-off Landing + -
787 360 437 408 260 ~11 ~5
Optimal velocities (km/h)
Ailerons Rudder Elevators Radiator
< 450 < 390 < 420 N/A

Engine performance

Engine Aircraft mass
Engine name Number Empty mass Wing loading (full fuel)
Svenska Flygmotor RM1 1 3,420 kg 188 kg/m2
Engine characteristics Mass with fuel (no weapons load) Max Takeoff
Weight
Weight (each) Type 6m fuel 20m fuel 22m fuel
705 kg Centrifugal-flow turbojet 3,654 kg 4,107 kg 4,172 kg 5,000 kg
Maximum engine thrust @ 0 m (RB / SB) Thrust to weight ratio @ 0 m (100%)
Condition 100% WEP 6m fuel 20m fuel 22m fuel MTOW
Stationary 1,290 kgf N/A 0.35 0.31 0.31 0.26
Optimal 1,290 kgf
(0 km/h)
N/A 0.35 0.31 0.31 0.26

Survivability and armour

Protective components found in the J21RA.
Crew1 person
Speed of destruction
Structural787 km/h
Gear360 km/h
  • 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

Repair costBasic → Reference
AB3 300 → 4 488 Sl icon.png
RB9 800 → 13 328 Sl icon.png
SB15 790 → 21 474 Sl icon.png
Total cost of modifications74 200 Rp icon.png
168 000 Sl icon.png
Talisman cost2 100 Ge icon.png
Crew training110 000 Sl icon.png
Experts370 000 Sl icon.png
Aces1 700 Ge icon.png
Research Aces720 000 Rp icon.png
Reward for battleAB / RB / SB
100 / 300 / 530 % Sl icon.png
196 / 196 / 196 % Rp icon.png
Modifications
Flight performance Survivability Weaponry
Mods aerodinamic fuse.png
Fuselage repair
Research:
7 400 Rp icon.png
Cost:
17 000 Sl icon.png
390 Ge icon.png
Mods jet compressor.png
Compressor
Research:
4 200 Rp icon.png
Cost:
9 500 Sl icon.png
220 Ge icon.png
Mods booster.png
New boosters
Research:
4 200 Rp icon.png
Cost:
9 500 Sl icon.png
220 Ge icon.png
Mods aerodinamic wing.png
Wings repair
Research:
6 200 Rp icon.png
Cost:
14 000 Sl icon.png
330 Ge icon.png
Mods jet engine.png
Engine
Research:
6 200 Rp icon.png
Cost:
14 000 Sl icon.png
330 Ge icon.png
Mods g suit.png
G-suit
Research:
8 000 Rp icon.png
Cost:
18 000 Sl icon.png
420 Ge icon.png
Mods armor frame.png
Airframe
Research:
4 200 Rp icon.png
Cost:
9 500 Sl icon.png
220 Ge icon.png
Mods armor cover.png
Cover
Research:
8 000 Rp icon.png
Cost:
18 000 Sl icon.png
420 Ge icon.png
Mods ammo.png
akan_m47_belt_pack
Research:
7 400 Rp icon.png
Cost:
17 000 Sl icon.png
390 Ge icon.png
Mod arrow 1.png
Mods ammo.png
bmg50_belt_pack
Research:
4 200 Rp icon.png
Cost:
9 500 Sl icon.png
220 Ge icon.png
Mod arrow 1.png
Mods weapon.png
akan_m47_new_gun
Research:
6 200 Rp icon.png
Cost:
14 000 Sl icon.png
330 Ge icon.png
Mods weapon.png
bmg50_new_gun
Research:
8 000 Rp icon.png
Cost:
18 000 Sl icon.png
420 Ge icon.png

Armaments

Offensive armament

Ammunition140 rounds
Fire rate725 shots/min
Ammunition1 350 rounds
Fire rate768 shots/min

The J21RA is armed with:

  • 1 x 20 mm Akan m/45 cannon, nose-mounted (140 rpg)
  • 2 x 12.7 mm Akan m/39A machine guns, nose-mounted (350 rpg = 750 total)
  • 2 x 12.7 mm Akan m/39A machine guns, wing-mounted (325 rpg = 650 total)

Usage in battles

One way to operate this aircraft is to zoom climb up to about 2.5k-3k meters and then drop on a low and slow jet. Staying on someone's tail is very easy with this plane and its defensive flying is quite effective.

Pros and cons

Pros:

  • Good turn rate compared to other jets
  • Decent armament
  • Good low-speed performance when utilising flaps

Cons:

  • Slow for a jet
  • Climb might be the worst in comparison to others in its battle rating
  • Bad energy retention

History

The J21RA is a variant of the Saab 21R, a unique early jet fighter developed from the previous Saab 21. The aircraft was one of two semi-successful conversions of propeller fighters into jet fighters, the other being the Soviet Yak-15 (which was converted from the Yak 1/3/7/9 series). The aircraft served as one of the first jet-engined aircraft in Swedish service and was also the first jet-engined-aircraft produced by Saab. The Saab 21Rs were retired in the 1950s with the introduction of more advanced Swedish aircraft.

During WWII, the Saab aircraft production company produced the Saab 21, a fighter aircraft with an unorthodox twin-boom configuration along with a German DB 605B engine. The first such aircraft flew in July of 1943 and entered service soon thereafter. During this time, the Saab firm explored various options for upgrading their Saab 21s, including a variant powered by a Rolls-Royce Griffon engine producing 2000 hp. However, at the same time, the Saab firm was also investigating the possibility of a jet-engined fighter; this led the Saab firm to pursue a jet-engined variant of the Saab 21 for use with the Swedish air force.

In 1947, Saab received the first older J21 airframes for conversion into a jet fighter, designated the J21R; the airframes were extensively modified to house a British-sourced De Havilland Goblin turbojet in place of the DB 605 and its corresponding propeller. Extensive modifications were also made to the aircraft’s fuselage, wings and tailplane; notably, the tail section was redesigned so that the elevator would be clear of the jet engine’s exhaust. Additionally, the aircraft featured an ejection seat, a novelty at the time.

Initially, a production run of 124 aircraft was planned; however, this was cut to 64 aircraft when the more-advanced J29 Tunnan became available in 1948. The J21RA was the designation given to the first 34 of these aircraft, powered by the Goblin 2 engine, while the J21RB was powered by an indigenously-built Goblin 3 engine. The J21 was retired in the mid-1950s with the introduction of more advanced aircraft such as the Saab 32 Lansen; no original aircraft were preserved but an old Saab 21 airframe was converted to resemble the Saab 21R; this aircraft is displayed at the Swedish Air Force Museum.

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: ASJA  J6B
Fighters  J21A-1 · J21A-2 · A21A-3
Jet fighters  A21RB · J21RA · J29A · J/A29B · J29D · J29F · A32A · J32B · J35D
Jet attackers  SK60B · SAAB-105G
Bombers  B17A · B17B · B17BS
Dive-bombers  B3C · B18A · B18B · T18B-1 · T18B-2
Export  SAAB-105OE

Sweden jet aircraft
Saab 
Fighters  J21RA · A21RB · J29A · J/A29B · J29D · J29F · J32B · J35D
Strike aircraft  A32A · SK60B · SAAB-105G · SAAB-105OE
Foreign import  J28B