La-7B-20

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La-7B-20
la-7b-20.png
AB
RB
SB
General characteristics
Brief
Detailed
5.7/5.0/5.0BR
FighterClass
1 personCrew
2.8 tEmpty weight
3.3 tTake-off weight
Flight characteristics
10 450 mCeiling
sec20.1/20.1/19.0Turn Time
168 km/hStalling speed
Shvetsov M-82FNEngine
RadialType
airCooling system
Speed of destruction
735 km/hStructural
320 km/hGear
Offensive armament
3 х 20 mm B-20S cannonWeapon 1
390 roundsAmmunition
750 shots/minFire rate
Suspended armament
2 х 50 kg FAB-50 (forged) bombSetup 1
2 х 100 kg FAB-100 (forged) bombSetup 2
Economy
54 000 Rp icon.pngResearch
180 000 Sl icon.pngPurchase
Sl icon.png5 900 / 7 504/7 610 / 9 679/2 490 / 3 167Repair
52 000 Sl icon.pngCrew training
180 000 Sl icon.pngExperts
940 Ge icon.pngAces
x 1.66 Rp icon.pngReward for battle
This page is about the Russian fighter La-7B-20. For other versions, see La-7 and Dolgushin's La-7.

Description

GarageImage La-7B-20.jpg


The La-7B-20 is a rank IV Russian fighter with a battle rating of 5.0 (AB/RB) and 5.7 (SB). This aircraft was introduced in Update 1.31.

General info

Flight Performance

Describe how the aircraft behaves in the air. Speed, manoeuvrability, acceleration and allowable loads - these are the most important characteristics of the vehicle.

Characteristics
Stock
Max Speed
(km/h at 6,000 m)
Max altitude
(meters)
Turn time
(seconds)
Rate of climb
(meters/second)
Take-off run
(meters)
AB RB AB RB AB RB
632 614 10,450 21.3 21.7 14.1 14.1 348
Upgraded
Max Speed
(km/h at 6,000 m)
Max altitude (meters) Turn time (seconds) Rate of climb
(meters/second)
Take-off run (meters)
AB RB AB RB AB RB
 ?  ? 10,450  ??.?  ??.?  ?.?  ?.? 348

Details

Features
Combat flap Take-off flap Landing flap Air brakes Arrestor gear
X X X
Limits
Wing-break speed
(km/h)
Gear limit
(km/h)
Combat flap
(km/h)
Max Static G
+ -
735 320 530 ~21 ~21
Optimal velocities
Ailerons
(km/h)
Rudder
(km/h)
Elevators
(km/h)
Radiator
(km/h)
< 350 < 350 < 440 > 230
Compressor (RB/SB)
Setting 1
Optimal altitude 100% Engine power WEP Engine power
1,550 m 1670 hp 1,958 hp
Setting 2
Optimal altitude 100% Engine power WEP Engine power
4,700 m 1,410 hp  ?,??? hp

Survivability and armour

  • 55 mm Bulletproof glass in cockpit front.
  • 66 mm Bulletproof glass in cockpit rear.
  • 8.5 mm Steel plate in the pilot's seat.

Armaments

Offensive armament

Main article: B-20S (20 mm)

The La-7B-20 is armed with:

  • 3 x 20 mm B-20S cannons, nose-mounted (130 rpg = 390 total)

Suspended armament

The La-7B-20 can be outfitted externally with:

  • 2 x 50 kg FAB-50 bombs (100 kg total)
  • 2 x 100 kg FAB-100 bombs (200 kg total)

Usage in battles

The key to staying alive in the La-7 series lies in deceiving the enemy. By flying at around 4.5 km altitude you present yourself as an easy target for Boom & Zoom aircraft that are flying at higher altitudes. When you spot someone diving at you, break off and evade his burst, while slowly luring him into maneuver combat - this way you will start gaining the edge while the enemy loses his speed and momentum in the turn. Another habit worth developing in the La-7B-20 is ammo conservation - because the available load per gun shrunk compared to the La-7, it is crucial to only take shots that you know will hit and aiming them carefully. This way you stand a bigger chance of critically damaging the enemy airplane. By following those rules you will soon find yourself researching the final Lavochkin piston fighter - the La-9.

The aircraft are placed quite low in the Battle Rating spread, which means that you will still engage Rank III aircraft. The strengths are very good low altitude performance - ideally, you want to engage your enemies at altitudes lower than 5 km - higher up, the power output of the engine reduces drastically, making you an easy target. Aside from the speed, the La-7 possesses very good turning capabilities - while it is not as good a turner as some British and Japanese designs, it can give many German and US aircraft a run for their money.

Manual Engine Control

MEC elements
Mixer Pitch Radiator Supercharger Turbocharger
Oil Water Type
Controllable Not controllable Not controllable Not controllable Separate Not controllable Not controllable

Modules

Tier Flight performance Survivability Weaponry
I Fuselage Repair Radiator Armored Glass DZ-40
II Compressor Airframe
III Wing Repair Engine Rear Plate Armor Offensive 20 mm
IV Engine Injection Cover New 20 mm Cannons

Four upgrades are of importance: Offensive 20 mm, Compressor, Engine and Engine injection.

Pros and cons

Pros:

  • Excellent low altitude performance (< 3000 m)
  • Decent maneuverability
  • Great acceleration and climb
  • Good roll rate
  • Centre-mounted cannons

Cons:

  • Poor performance at high altitude (> 4000 m)
  • Poor maximum dive speed
  • Fast-firing cannons burn through ammunition

History

The concept of a new fighter for the Soviet Air Force was pitched in 1943. While the earlier Lavochkin La-5 proved to be one of the best Soviet fighters produced up to that point, the main designer of the La-5, Semyon Lavochkin, felt that it could be improved even further. Work on a completely new fighter began in the early months of 1944. The new fighter was supposed to be an improved version of the La-5 design. The changes included the incorporation of a lighter and more durable metal airframe in place of the earlier wooden one. Other changes included the mounting of a new gun sight and propeller, as well as the strengthening of the landing gear struts and streamlining of the wings. It was to be armed with three Berezin B-20 20 mm cannons, however, the delay in production meant that most new La-7s were armed with 2 20 mm ShVAK cannons, like its predecessor. After more tests, the new fighter was accepted into serial production in late 1944.

In September 1944, the first La-7s found their way onto the front lines with the 63rd Guard Fighter Aviation Corps. The reception of the new fighter was warm - it was faster and more maneuverable than the La-5, which meant it could more efficiently tackle the most common German fighter the Soviets faced: the Messerschmitt Bf 109 G. In certain circumstances, the speed allowed the Soviet pilots to intercept Fw 190 fighter-bombers - a feat impossible to achieve for other Soviet fighters like the Yak-3. The main critiques of the design were considered to be the engine reliability and armament - the twin 20 mm ShVAK cannons were judged as inadequate in fights against better armoured Fw 190s. Still, the La-7 became one of the most successful Soviet piston fighters of World War II. Soviet ace Ivan Kozhedub scored 17 kills while flying the La-7 - his last one being an Me 262 jet. After the war the La-7 was replaced by the La-9 prop fighter, although many were still used by other communist states as both fighters and trainer aircraft.

In-game description

"A single-seat cantilever monoplane fighter with a closed cockpit and retractable landing gear with a tail wheel. The La-7 was the successor to the La-5FN. Testing began on the experimental La-5 Benchmark 1944 in February 1944, and went into series production in May 1944 with the designation La-7.

The La-5 Benchmark 1944 underwent tests with three synchronized Berezina B-20 aviation cannons. These new cannons were large-caliber UB machine guns redesigned for use with 20 mm rounds, and were not yet in series production. They were very light (only 25 kg) but unreliable. For this reason, the test reports recommended series production of the plane with the same armament as was used on the La-5FN – two 20 mm Shpitalny-Vladimirov ShVAK cannons.

In October 1944, the B-20 cannons went into production at the Kovrov Ordnance Plant, and in January–February 1945, the La-7 underwent testing with them again. The in-flight firing results showed that the reliability of the cannons had improved, but was still lower than that of the ShVAK cannons. Nonetheless, a small batch of the fighters with three cannons (these were also called “three-pointers”) was produced in the winter of 1944–1945 on the No. 381 Aviation Plant in Moscow.

The La-7 was also tested with three experimental Shpitalny SH-20 cannons, but this cannon was never adequately tuned, so it failed to make its way into the series.

The plane contained the twin-row air-cooled 14-cylinder A.D. Shvetsov ASH-82FN radial engine with a maximum output of 1,850 hp.

Its firing armament consisted of three 20 mm synchronized Berezina B-20 cannons with 130 rounds each.

The plane's bomb complement consisted of two detachable wing-mounted DZ-40 locking bomb racks, each of which could carry bombs with a caliber of up to 100 kg. It mostly used the general-purpose air-dropped FAB-50 and FAB-100 bombs, along with the ZAB-50 and ZAB-100 incendiary bombs and the AO-50 and AO-25 fragmenting bombs.

Approximately 368 planes of this model were made. Further production was stopped owing to the unsatisfactory reliability of the B-20 cannons. However, combat pilots liked the “three-pointer” La-7 and, like the test pilots, did not complain about the weaponry's operation."

Media

DigitalDigging review
Viola Games review
Messer Smitt review

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

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • encyclopedia page on the aircraft;
  • other literature.


USSR fighters
I-15  I-15 WR · I-15 M-22 · I-15R · I-15bis
I-153  I-153 M-62 Chaika · Zhukovsky's I-153-M62 · I-153P Chaika
I-16  I-16 type 5 Ishak · I-16 type 10 Ishak · I-16 type 18 Ishak · I-16 type 24 Ishak · I-16 type 27 Ishak · I-16 type 28 Ishak · I-180S
I-185  I-185 (M-71) · I-185 (M-82)
MiG-3  MiG-3-15 · MiG-3-15 (BK) · MiG-3-34
LaGG  I-301 · LaGG-3-4 · LaGG-3-8 · LaGG-3-11 · LaGG-3-23 · LaGG-3-34 · LaGG-3-35 · LaGG-3-66
La  La-5 · La-5F · La-5FN · La-7 · Dolgushin's La-7 · La-7B-20 · La-9 · La-11
Yak-1/7  Yak-1 · Yak-1B · Yak-7B
Yak-3  Yak-3 · Yak-3P · Yak-3T · Yak-3U · Yak-3 (VK-107)
Yak-9  Yak-9 · Yak-9B · Golovachev's Yak-9M · Yak-9T · Yak-9K · Yak-9U · Yak-9UT · Yak-9P
Other countries  ▂P-40E-1 Kittyhawk · ▂P-47D-27 Thunderbolt · ▂Hurricane Mk IIB · ▂Fw 190 D-9 · ▂Spitfire Mk IXc
P-39  ▂P-39K-1 Airacobra · ▂Pokryshkin's P-39N-0 Airacobra · ▂P-39Q-15 Airacobra
P-63  ▂P-63A-5 Kingcobra · ▂P-63A-10 Kingcobra · ▂P-63C-5 Kingcobra