BI

BI

BI

USSR

V Rank

Battle rating:

AB	RB	SB
6.7	6.7	6.3

Class:

Fighter

Jet fighter

Purchase:Bundle or Gift

Show in game

MARKET

Description

The BI is a gift rank V Soviet jet fighter with a battle rating of 6.7 (AB/RB) and 6.3 (SB). It was introduced during Update "Raining Fire" as a reward for the 2020 Wargame "Strategist" event, and is currently available for sale on the Marketplace.

General info

Flight performance

Characteristics	Max Speed (km/h at 4,500 m)		Max altitude (metres)	Turn time (seconds)		Rate of climb (metres/second)		Take-off run (metres)
	AB	RB		AB	RB	AB	RB
Stock	793	787	12000	21.2	21.2	84.9	79.4	400
Upgraded	807	800		20.8	21.0	116.4	100.0

Details

Features
Combat flaps	Take-off flaps	Landing flaps	Air brakes	Arrestor gear	Drogue chute
X	X	✓	X	X	X

Limits
Wings (km/h)	Gear (km/h)	Flaps (km/h)			Max Static G
		Combat	Take-off	Landing	+	-
920	420	N/A	N/A	320	~9	~3

Optimal velocities (km/h)
Ailerons	Rudder	Elevators	Radiator
< 400	< 410	< 550	N/A

Engine performance

Engine			Aircraft mass
Engine name		Number	Basic Mass	Wing loading (full fuel)
Isaev D-1a		1	924 kg	233 kg/m2
Engine characteristics			Mass with fuel (no weapons load)		Max Takeoff Weight
Weight (each)	Type		0m fuel	1m fuel
300 kg	Liquid-fuel rocket		1,134 kg	1,629 kg	1,650 kg
Maximum engine thrust @ 0 m (RB / SB)			Thrust to weight ratio @ 0 m (100%)
Condition	100%	WEP	0m fuel	1m fuel	MTOW
Stationary	1,121 kgf	N/A	0.99	0.69	0.68
Optimal	1,121 kgf (any speed)	N/A	0.99	0.69	0.68

Survivability and armour

• 5.5 mm steel behind the pilot.
• 5.5 mm steel plate installed in the nose.
• 64 mm bulletproof glass in front of pilot
• Self-sealing fuel tanks* (7 under the cannon barrels, 8 behind pilot, 3 in rear fuselage)

*The fuel tanks are cylinder-shaped, not rectangular, like most planes' fuel tanks, allowing for more fuel tanks.

Armaments

Offensive armament

The BI is armed with:

• 2 x 20 mm ShVAK cannons, nose-mounted (45 rpg = 90 total)

Usage in battles

The BI is similar to the Me 163 - small amounts of fuel and ammo (low flight endurance) but has astonishing performance, being able to climb 80 degrees vertically. As such it excels in the interceptor role, climbing at a extremely high rate of up to 116.4 meters per second able to shoot down bombers before exhausting its fuel supply and landing again. Don't be rused by its acceleration into thinking it has a high top speed - the wings and elevators will lock up at mach speed: 0. Thus making any manoeuvres and climbs impossible.

Do not try to outrun enemies, in turn fights but instead use your manoeuvrability and acceleration to fight them, your speed & small size will be your only zenith.

How to climb and get best battle endurance with the correct fuel management

To get the longest endurance out of it's limited fuel amount, climb from the airfield at full throttle as you hit 2400 meters, throttle back to 30%, adjust your climb angle this will allow you to travel to 5000 plus meters without burning much of your preciouses rocket fuel. This fuel, you will need for later in the battle. Once you have hit 5000 meters, throttle back to 14% and continue to climb and adjust your climb angle again to roughly XX degrees. You can continue to climb at this angle until you see it fit not to do so.

When you hit the altitude you like, you can throttle back to 0% and just glide, with only minor adjustment to the throttle to keep in you level flight.

Modules

Tier	Flight performance	Survivability	Weaponry
I	Fuselage repair		Offensive 20 mm
II		Airframe
III	Wings repair		New 20 mm cannons
IV	Engine	Cover

Pros and cons

Pros:

• Amazing acceleration.
• Great roll rate.
• Excellent manoeuvrability.
• Takes off is very fast.
• Incredible climb rate.
• Very strong airframe.
• Very small size, makes successfully engaging it very hard.

Cons:

• Not very well armoured or crew protection
• Only has landing flaps
• Can reach rip speed (Mach 0.81) while travelling in a straight line
• Very hard to pull out of a dive, due to it's great speed.
• Maximum fuel load is only 1 minute and 57 seconds.
• Limited armament, only two ShVAK cannons with 45 rounds each.

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

Skins

• Skins and camouflages for the BI from live.warthunder.com.

Videos

Most unusual aircraft discusses the BI at 3:44 - War Thunder Official Channel

The Shooting Range #218 - Metal Beasts section at 00:28 discusses the BI.

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.