Difference between revisions of "La-7B-20"

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(Flight Performance: Updated table design and added performance details)
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=== Flight performance ===
 
=== Flight performance ===
 
{{Specs-Avia-Flight}}
 
{{Specs-Avia-Flight}}
''Describe how the aircraft behaves in the air. Speed, manoeuvrability, acceleration and allowable loads - these are the most important characteristics of the vehicle.''
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<!--''Describe how the aircraft behaves in the air. Speed, manoeuvrability, acceleration and allowable loads - these are the most important characteristics of the vehicle.''-->
  
{| class="wikitable" style="text-align:center"
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{| class="wikitable" style="text-align:center" width="70%"
 
! rowspan="2" | Characteristics
 
! rowspan="2" | Characteristics
 
! colspan="2" | Max Speed<br>(km/h at 6,000 m)
 
! colspan="2" | Max Speed<br>(km/h at 6,000 m)
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|-
 
|-
 
! Stock
 
! Stock
| 636 || 614 || rowspan="2" | {{Specs|ceiling}} || 21.0 || 21.7 || colspan="2" | 14.1 || rowspan="2" | 348
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| 636 || 614 || rowspan="2" | {{Specs|ceiling}} || 21.0 || 21.7 || 14.1 || 14.1 || rowspan="2" | 348
 
|-
 
|-
 
! Upgraded
 
! Upgraded
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==== Details ====
 
==== Details ====
{| class="wikitable" style="text-align:center" width="70%"
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{| class="wikitable" style="text-align:center" width="50%"
 +
|-
 +
! colspan="5" | Features
 +
|-
 +
! Combat flaps !! Take-off flaps !! Landing flaps !! Air brakes !! Arrestor gear
 +
|-
 +
| ✓ || ✓ || ✓ || X || X    <!-- ✓ -->
 +
|-
 +
|}
 +
 
 +
{| class="wikitable" style="text-align:center" width="50%"
 +
|-
 +
! colspan="7" | Limits
 +
|-
 +
! rowspan="2" | Wings (km/h)
 +
! rowspan="2" | Gear (km/h)
 +
! colspan="3" | Flaps (km/h)
 +
! colspan="2" | Max Static G
 +
|-
 +
! Combat !! Take-off !! Landing !! + !! -
 +
|-
 +
| {{Specs|destruction|body}} || {{Specs|destruction|gear}} || 530 || 530 || 300 || ~13 || ~13
 +
|-
 +
|}
 +
 
 +
{| class="wikitable" style="text-align:center"
 
|-
 
|-
! colspan="5" | Features !! colspan="2" width="25%" | Limits (km/h)
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! colspan="4" | Optimal velocities (km/h)
 
|-
 
|-
! Combat flaps !! Take-off flaps !! Landing flaps !! Air brakes !! Arrestor gear !! Wings !! Gear
+
! Ailerons !! Rudder !! Elevators !! Radiator
 
|-
 
|-
| || || ✓ || X || X || {{Specs|destruction|body}} || {{Specs|destruction|gear}}    <!-- ✓ -->
+
| < 400 || < 400 || < 400 || > 341
 
|-
 
|-
 
|}
 
|}

Revision as of 13:44, 7 February 2021

VTOL | Rank 5 USSR
Yak-38 Pack
This page is about the Russian fighter La-7B-20. For other versions, see La-7 and Dolgushin's La-7.
La-7B-20
la-7b-20.png
GarageImage La-7B-20.jpg
La-7B-20
AB RB SB
5.0 5.0 5.7
Class:
Research:54 000 Specs-Card-Exp.png
Purchase:180 000 Specs-Card-Lion.png
Show in game

Description

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

General info

Flight performance

Max speed
at 6 000 m661 km/h
Turn time20 s
Max altitude10 450 m
EngineShvetsov M-82FN
TypeRadial
Cooling systemAir
Take-off weight3 t
Characteristics Max Speed
(km/h at 6,000 m)
Max altitude
(metres)
Turn time
(seconds)
Rate of climb
(metres/second)
Take-off run
(metres)
AB RB AB RB AB RB
Stock 636 614 10450 21.0 21.7 14.1 14.1 348
Upgraded 694 661 19.2 20.2 23.8 18.2

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 + -
735 320 530 530 300 ~13 ~13
Optimal velocities (km/h)
Ailerons Rudder Elevators Radiator
< 400 < 400 < 400 > 341

Survivability and armour

Crew1 person
Speed of destruction
Structural735 km/h
Gear320 km/h
  • 55 mm Bulletproof glass in the cockpit front.
  • 66 mm Bulletproof glass in the cockpit rear.
  • 8.5 mm Steel plate in the pilot's seat.

Modifications and economy

Repair costBasic → Reference
AB3 130 → 3 984 Sl icon.png
RB9 650 → 12 284 Sl icon.png
SB8 100 → 10 311 Sl icon.png
Total cost of modifications47 100 Rp icon.png
101 000 Sl icon.png
Talisman cost1 500 Ge icon.png
Crew training52 000 Sl icon.png
Experts180 000 Sl icon.png
Aces940 Ge icon.png
Research Aces480 000 Rp icon.png
Reward for battleAB / RB / SB
110 / 290 / 340 % Sl icon.png
166 / 166 / 166 % Rp icon.png
Modifications
Flight performance Survivability Weaponry
Mods aerodinamic fuse.png
Fuselage repair
Research:
2 400 Rp icon.png
Cost:
5 200 Sl icon.png
160 Ge icon.png
Mods radiator.png
Radiator
Research:
2 400 Rp icon.png
Cost:
5 200 Sl icon.png
160 Ge icon.png
Mods compressor.png
Compressor
Research:
5 300 Rp icon.png
Cost:
11 000 Sl icon.png
340 Ge icon.png
Mods aerodinamic wing.png
Wings repair
Research:
2 900 Rp icon.png
Cost:
6 300 Sl icon.png
190 Ge icon.png
Mods new engine.png
Engine
Research:
2 900 Rp icon.png
Cost:
6 300 Sl icon.png
190 Ge icon.png
Mods metanol.png
Engine injection
Research:
5 100 Rp icon.png
Cost:
11 000 Sl icon.png
330 Ge icon.png
Mods armor glas.png
Armored glass
Research:
2 400 Rp icon.png
Cost:
5 200 Sl icon.png
160 Ge icon.png
Mods armor frame.png
Airframe
Research:
5 300 Rp icon.png
Cost:
11 000 Sl icon.png
340 Ge icon.png
Mods armor back.png
Rear armor plate
Research:
2 900 Rp icon.png
Cost:
6 300 Sl icon.png
190 Ge icon.png
Mods armor cover.png
Cover
Research:
5 100 Rp icon.png
Cost:
11 000 Sl icon.png
330 Ge icon.png
Mods pilon bomb.png
DZ-40
Research:
2 400 Rp icon.png
Cost:
5 200 Sl icon.png
160 Ge icon.png
Mods ammo.png
shvak_belt_pack
Research:
2 900 Rp icon.png
Cost:
6 300 Sl icon.png
190 Ge icon.png
Mod arrow 0.png
Mods weapon.png
b20_new_gun
Research:
5 100 Rp icon.png
Cost:
11 000 Sl icon.png
330 Ge icon.png

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

Armaments

Offensive armament

Weapon 13 x 20 mm B-20S cannon
Ammunition390 rounds
Fire rate750 shots/min
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

Number of setups2
List of setups
Setup 12 x 50 kg FAB-50sv (forged) bomb
Setup 22 x 100 kg FAB-100sv (forged) bomb

The La-7B-20 can be outfitted with the following ordnance:

  • Without load
  • 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 4,500 m (15,000 ft) 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 manoeuvre 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 has decreased compared to the La-7, it is crucial to only take shots that you know will hit. This way, you stand a larger chance of critically damaging the enemy airplane. By following those rules, you will soon find yourself efficiently researching the final Lavochkin piston fighter - the La-9.

The LA-7B-20 is placed quite low in the Battle Rating spread, which means that you will still engage Rank III aircraft.

One strength that you will want to take advantage of is the excellent 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-7B-20 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
Not controllable Controllable
Not auto controlled
Controllable
Not auto controlled
Controllable
Not auto controlled
Separate Controllable
2 gears
Not controllable

Pros and cons

Pros:

  • Excellent low altitude performance (<3,000 m)
  • Decent manoeuvrability
  • Great acceleration and climb
  • Good roll rate
  • Centre-mounted cannons

Cons:

  • Poor performance at high altitude (>4,000 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 manoeuvrable 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

Videos

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


Lavochkin-Gorbunov-Gudkov (Лавочкин-Горбунов-Гудков)
Early Fighters  I-301 · LaGG-3-4 · LaGG-3-8 · LaGG-3-11 · LaGG-3-23 · LaGG-3-34 · LaGG-3-35 · LaGG-3-66
Late Fighters  La-5 · La-5F · La-5FN · La-7 · Dolgushin's La-7 · La-7B-20 · La-9 · La-11
Jet Fighters  La-15 · La-174 · La-200
Export  ␗La-9
Captured  ▀La-5FN

USSR fighters
I-15  I-15 WR · I-15 M-22 · I-15R · I-15bis
I-153  I-153 M-62 · Zhukovsky's I-153-M62 · I-153P
I-16  I-16 type 5 · I-16 type 10 · I-16 type 18 · I-16 type 24 · I-16 type 27 · I-16 type 28 · I-180S
I-29  I-29
I-185  I-185 (M-71) · I-185 (M-82)
I-225  I-225
ITP  ITP (M-1)
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 · ▂P-47D-27 · ▂Hurricane Mk IIB · ▂Fw 190 D-9 · ▂Spitfire Mk IXc
P-39  ▂P-39K-1 · ▂Pokryshkin's P-39N-0 · ▂P-39Q-15
P-63  ▂P-63A-5 · ▂P-63A-10 · ▂P-63C-5