J28B

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VTOL | Rank 5 USSR
Yak-38 Pack
J28B
vampire_fb5_j28b.png
AB
RB
SB
General characteristics
Brief
Detailed
7.7/7.3/7.7BR
1 personCrew
5.61 tTake-off weight
6.8 kg/sBurst mass
Flight characteristics
10668 mCeiling
de Havilland Goblin 3Engine
JetType
airCooling system
Speed of destruction
888 km/hStructural
330 km/hGear
Offensive armament
4 x 20 mm Akan m/47B cannonWeapon 1
600 roundsAmmunition
750 shots/minFire rate
Suspended armament
4 x 14,5 cm psrak m/49A rockets
4 x m/49A rockets
Setup 1
4 x 15 cm srak m/51 rockets
4 x 15 cm srak m/51 rockets
Setup 2
4 x 18 cm hprak m/49 rocketsSetup 3
Economy
99000 Rp icon.pngResearch
390000 Sl icon.pngPurchase
Sl icon.png21600 / 28641/13450 / 17834/4430 / 5874Repair
110000 Sl icon.pngCrew training
390000 Sl icon.pngExperts
1800 Ge icon.pngAces
202 % Rp icon.pngReward for battle
450 % Sl icon.png300 % Sl icon.png130 % Sl icon.png
This page is about the Swedish jet fighter J28B. For other versions, see Vampire FB 5 and Vampire FB 52A.

Description

GarageImage J28B.jpg


The J28B is a rank V Swedish jet fighter with a battle rating of 7.7 (AB/SB) and 7.3 (RB). It was introduced in Update 1.95 "Northern Wind".

The J28B is an early war jet known as the Vampire FB 5 in the British tech tree. It was ordered in large numbers by the Swedish air force to leap into the jet age. The Vampire family is known for its great dogfighting capabilities, meaning the J28B can comfortably fend off several opponents at once if controlled by a skillful pilot. This aerial performance is given at the cost of engine power.

General info

Flight performance

The J28B performs well at low altitude where it easily outturns most opponents it faces. Thanks to the excellent flaps and air brakes, a pilot aware of his/her energy can fend off anyone that picks a fight. The flaps can be utilised at various speeds to outturn any enemy at any time. Dogfights are where the Vampire platform shines, it is a highly effective fighter with its relatively light airframe and smooth controls. Although the power is lacklustre, a pilot aware of his/her surroundings will have no difficulty avoiding incoming enemies. This lack of engine power will, however, cripple the J28B when it comes to acceleration. A Vampire tends to lose a lot of speed when engaged in turning. So gaining it back to defend itself against new opponents becomes a hassle. And even if a J28B pilot manages to get their speed up, catching a target will be close to impossible with a slow top speed. This lack of power hinders the J28B in many ways, mostly related to energy. This is why "Vamp" pilots are advised to climb at the beginning of a match, despite the lack of a decent climb rate.

The Aiming reticle of the Swedish m/51 rockets.

The J28B performs identically to the Vampire FB 5 which should not come as a surprise. The firepower is what makes them different, however. The J28B is outfitted with the Swedish Akan m/47B (short for "Automatkanon"), which is the Swedish designation of the British Hispano Mk.V, although the calibre and fire rate are the same, the burst mass is larger. This has to do with the Swedish ammunition. The Swedish ammo type contains more TNT and is fully tracer equipped, meaning stealth isn't an option. Despite this downside, the guns perform closer to the American AN/M3 guns instead of the British Hispanos, making the J28B the most effective Vampire in regards to firepower. The J28B is also outfitted with several types of anti-tank and anti-ship rockets. Despite lacking the large 1,000 lb bombs the FB 5 offers, the rockets offer a much different experience compared to the original model. The rockets fire one at a time held on by a Swedish rocket rack, pointing them further down than usual. The average pilot, especially the ones coming from the FB 5, will find this new placement tricky to get used to. But considering the single fire system, a skilled pilot might be able to rack up more destroyed tanks in ground battles compared to the FB 5. If this becomes too sufferable, however, it is recommended to use "Fire rocket salvo" instead to fire off two rockets at once, for a more traditional feel. It's not worth sacrificing accuracy for efficiency when it comes to rockets.

Characteristics Max Speed
(km/h at 4,572 m)
Max altitude
(meters)
Turn time
(seconds)
Rate of climb
(meters/second)
Take-off run
(meters)
AB RB AB RB AB RB
Stock 817 792 10668 25.0 25.7 16.1 15.1 650
Upgraded 895 855 23.5 24.0 24.4 20.0

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 + -
888 330 520 520 300 ~10 ~5
Optimal velocities (km/h)
Ailerons Rudder Elevators Radiator
< 550 < 600 < 600 N/A

Engine performance

Engine Aircraft mass
Engine name Number Empty mass Wing loading (full fuel)
de Havilland Goblin 3 1 3,385 kg 190 kg/m2
Engine characteristics Mass with fuel (no weapons load) Max Takeoff
Weight
Weight (each) Type 11m fuel 20m fuel 30m fuel 39m fuel
705 kg Centrifugal-flow turbojet 3,734 kg 4,014 kg 4,325 kg 4,605 kg 5,606 kg
Maximum engine thrust @ 0 m (RB / SB) Thrust to weight ratio @ 0 m (100%)
Condition 100% WEP 11m fuel 20m fuel 30m fuel 39m fuel MTOW
Stationary 1,290 kgf N/A 0.35 0.32 0.30 0.28 0.23
Optimal 1,290 kgf
(0 km/h)
N/A 0.35 0.32 0.30 0.28 0.23

Survivability and armour

  • 38 mm Bulletproof glass - Armoured windscreen
  • 12.7 mm Steel - Armour plate behind the pilot's head
  • 3 mm Steel - Armour plate under the engine
Armour found inside the J28B

The J28B has the same armour as the Vampire FB 5 as well as the Italian Vampire FB 52A. Despite being dangerous in a head-on due to the beefed-up guns, a J28B should never fully commit to a head-on engagement, the bulletproof glass will, however, save the pilot most of the time. The tail section is not easily saved though. The twin-boom makes it twice as likely to hit the traction of control surfaces. This leaves the J28B completely useless usually resulting in abandonment of the aircraft, which should be avoided at all costs.

Armaments

Offensive armament

Main article: Akan m/47B (20 mm)

The J28B is armed with:

  • 4 x 20 mm Akan m/47B cannons, chin-mounted (150 rpg = 600 total)

Suspended armament

Main articles: m/49, m/49A, m/51

The J28B can be outfitted with the following ordnance:

  • Without load
  • 8 x m/49A rockets
  • 8 x m/51 rockets
  • 4 x m/49 rockets

Usage in battles

A J28B pilot should always be aware of his/her speed and altitude, or energy in more advanced terms. To avoid enemies with superior engine power using it as a boom and zoom target, a J28B pilot should use altitude to their advantage. Since the Vampire platform is bad at building up energy, the pilot should store as much energy as possible for when the battle begins. Before engaging targets, it can also be useful to always keep a speed of at least 400 km/h to limit the number of options an enemy has to counterattack. This also helps the J28B to swiftly turn around and begin a dogfight if the opponent commits to one. This playstyle can be applied to every Vampire plane in the game since they perform mostly the same. The J28B has to watch out for Ho 229 V3 players, however, since they can outmatch the J28B in turning. A good way to counter the Horten is to make it bleed speed. Forcing it to turn once or twice and then extending away from the enemy.

A playstyle close to that of a propeller-driven aircraft can be applied, where energy is the key to survival. The J28B has quite the firepower compared to the other Vampire models. This can reward players who can safely head-on from a distance and then avoid incoming shots from the enemy. This will usually result in a critical hit or straight-up destruction if the enemy doesn't also avoid. The fired rounds are quite deadly and require less gun-time compared to the British counterpart. This gives the J28B an overall higher chance of surviving since it can afford to spend less time on each target. A pilot comfortable with their aim will easily outsmart opponents and make them think twice before engaging in a future dogfight with a J28B.

Modules

Tier Flight performance Survivability Weaponry
I Fuselage repair Offensive 20 mm
II Compressor Airframe m/49A
III Wings repair Engine New 20 mm cannons m/51
IV G-suit Cover m/49

Pros and cons

Pros:

  • Great turning and dogfighting capabilities.
  • Stronger guns than the British/Italian counterpart.
  • Effective air-brakes that generate lift once deployed.
  • Decent ammo count.
  • Easy to land.
  • Powerful rockets with 500mm penetration.

Cons:

  • Slow top speed.
  • Poor rate of climb.
  • Low gun placement forcing pilots to aim higher than usual.
  • Weak tail section that often suffers damage from enemy fire.
  • Retains energy poorly.

History

The Swedish air force carefully studied what was happening at the Fronts in WWII, and by 1944 it was already obvious that the propeller era was coming to a close. By early 1945, the Swedes had already begun a project to power the Saab J21 with a ramjet. However, it seemed this project would take far too long. By autumn of 1945, the J29 project was also beginning to take shape. But even this project wouldn't take to the skies until 1949, so a foreign design had to do until then.

The British de Havilland Vampire was one of the first jet-powered fighter planes to enter the market, and Sweden was very interested in this design. In early 1946, Sweden ordered 70 Vampire F Mk 1 models designated J28A, thus becoming one of the first customers of the Vampire. This version was mostly used as practice for the new era of jet-driven aircraft. But the Swedes became fond of the design. So when the export version of the Vampire FB 5 entered the market known as the Mk 50, Sweden was very interested and orders started in 1949. This version was to be known as the J28B or A28B depending on suspended armaments. This version differed from the Mk 1 by having a renewed, rounder tail section, and a lower placed elevator. The engine was upgraded from the RM1 to the RM1A that was now produced by SFA (Svenska flygmotor AB) in Sweden and delivered to de Havilland in Britain for installation. The main armament was also changed from the Hispano Mk II to the more potent Hispano Mk V. By 1952, 310 J28B Vampires had been delivered to Sweden. 12 of these would be rebuilt as a two-seat trainer, known as the J28C-3.

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Vampire family

Similar aircraft

External links


de Havilland Aircraft Company Limited
Fighters  Hornet Mk.III · Mosquito FB Mk VI · Mosquito FB Mk XVIII
Jet Fighters  Vampire FB 5 · Venom FB.4 · Sea Venom FAW 20
Export  Mosquito FB.Mk.26 · Vampire FB 52A · J28B

Sweden jet aircraft
Saab  J21RA · A21RB · J29A · J/A29B · J29D · J29F · A32A · J32B · J35D · SK60B
Foreign import  J28B