Strf 9040 BILL
Contents
Description
The Stridsfordon 9040 BILL is a rank VII Swedish light tank with a battle rating of 10.7 (AB) and 10.3 (RB/SB). It was introduced in Update "Starfighters".
General info
Survivability and armour
The Strf 9040 BILL does not have the MEXAS armour package of the Strf 9040C and Lvkv 9040C, and as such the protection is very limited. The frontal arc of the vehicle can protect against heavy machine guns but the sides and rear of both the hull and turret are vulnerable even to .50 calibre (12.7 mm) heavy machine guns. The frontal arc can not protect against cannons of even 20 mm in calibre, except on the upper glacis which has a shallow enough angle to cause armour piercing rounds of types other than APDS and APFSDS to ricochet. The turret front and lower glacis on the other hand do not have such angles and can not cause ricochets in the same way, allowing low calibre cannons to penetrate. HEAT and HESH rounds will penetrate the frontal armour without a problem.
The crew placement of the Strf 9040 BILL is both potential helpful and harmful. A shot to the front, left side of the hull would result in the knocking out of the driver, commander, and loader. This is potential devastating as that is three out of five crew members taken out in one shot, with only one more lost resulting in a vehicle knockout. A shot to the right side of the vehicle's front would knock out the engine and if it had enough penetration would go through and take out the gunner and loader, two out of five crew members but also causing the vehicle to be immobilized. As before stated, the engine can absorb projectiles, preventing them from passing into the crew compartment if they don't have high enough penetration, but it does immobilize the vehicle and potentially allow the enemy to get another shot off immediately afterwards. In terms of ammunition stowage, all 40 mm ammunition is stowed in the base of the turret basket and the hull underneath the turret basket. This prevents most hits from causing a cookoff of 40 mm ammunition except for particularly low hits. On the other hand, the missile stowage is at the rear of the hull and takes up a significant volume, making the missile ammunition a large target. Additionally, the missile launcher has missiles in it which can also be detonated by incoming rounds.
Overall, the Strf 9040 BILL has very light armour and insufficient protection meaning nearly all weapons can penetrate it that are larger than a machine gun. Sometimes the internal arrangement can result in a hit not knocking out the vehicle but nearly any hit will be critical. The upper glacis can block some shots because of the high angle but this can not be relied upon. Finally, the ammunition stowage - particularly the missile stowage - takes up a large volume of the vehicle and can be set off very easily.
Armour type:
- Rolled homogeneous armour - hull, turret sides/rear
- Cast homogeneous armour - turret front
| Armour | Front (Slope angle) | Sides | Rear | Roof |
|---|---|---|---|---|
| Hull | 20 mm (78°) Upper glacis 20 mm (29°-41°-52°) Lower glacis |
6 + 10 mm (Spaced) Upper 10 mm Lower |
20 mm | 20 mm Roof 6 mm Rear roof crew hatch |
| Turret | 20 mm (35°) - 20 mm (50°) Turret front 35 mm (Various Angles) Gun mantlet |
20 mm | ||
| Cupola | 20 mm | |||
Notes:
- There is a 10 mm RHA plate between the front of the vehicle and the driver and also between the engine and crew compartments
- Tracks, suspension - 20 mm
- Sideskirts, turret rear stowage boxes - 5 mm
Mobility
| Game Mode | Max Speed (km/h) | Weight (tons) | Engine power (horsepower) | Power-to-weight ratio (hp/ton) | |||
|---|---|---|---|---|---|---|---|
| Forward | Reverse | Stock | Upgraded | Stock | Upgraded | ||
| Arcade | 78 | 51 | 23.7 | 852 | 1,049 | 35.95 | 44.26 |
| Realistic | 70 | 46 | 486 | 550 | 20.51 | 23.21 | |
As the Strf 9056 lacks the add-on modular armour of the 90C variants, it has a noticeably lighter feel on the move. The low weight combined with high-output Scania engine leads to an agile and swift moving vehicle, able to do sneaky flanking manoeuvres and capable of climbing steep hills to get into ambush positions. When played right, the Strf 9056 is quicker than the Strf 90C, and is able to surprise enemies by showing up in unexpected places.
Modifications and economy
| Mobility | Protection | Firepower | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Armaments
Main armament
The Strf 9056, like the two other Strf 9040 variants (the Strf 90C and Lvkv 90C), is armed with a Bofors L/70 40 mm anti-aircraft gun repurposed as an omnipurpose (anti-tank, anti-aircraft) gun. The automatic cannon boasts a rapid fire rate, a magazine holding 24 shells, and a complete maximum load of 234 shells. The gun's internal 24-shell magazine is quickly replenished, and is usually enough to deal with both enemy armour, helicopters, and airplanes. It does however carry a risk of surprising the player by running empty - thanks to its high rate of fire. The shells carried are the same as on the Lvkv 90C - the spårljuspansarprojektil m/90 (APFSDS-T), spårljusspränggranat m/90 (HE-T), and kulspränggranat m/90 (HE-VT). The former two are stock shells - the latter is unlocked through research, on the 2nd tier for an RP cost of 18.000, and has a proximity fuze, very helpful against air targets.
The Strf 9056 also carries a 7.62 mm Ksp 39C, coaxial to the main gun, placed in its turret cheek. The most unusual armament is however the Robot 56 "BILL 2 - Bofors, Infantry, Light & Lethal". The dual-missile launcher, mounted on the right side of the turret, can be devastating to enemy armour behind cover. Its missiles fly above the point of aim, detonating above the vehicle, firing its explosively formed penetrator through the turret roof or engine deck, thus hitting areas with the lowest armour protection. A well-aimed hit can destroy a target in a single hit by igniting ammunition, igniting fuel tanks, or knocking out crew. The missiles do however have a limited range of only 2200 meters, and a relatively low speed of 250 meters per second. Used carefully, the vehicle's load of 8 missiles can easily knock out 8 enemy tanks!
| 40 mm akan m/70B | Turret rotation speed (°/s) | Reloading rate (seconds) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mode | Capacity | Fire rate | Vertical | Horizontal | Stabilizer | Stock | Upgraded | Full | Expert | Aced | Stock | Full | Expert | Aced |
| Arcade | 234 | 300 | -8°/+35° | ±180° | Two-plane | 33.2 | 46.0 | 53.9 | 63.7 | 65.7 | 0.20 | 0.20 | 0.20 | 0.20 |
| Realistic | 20.8 | 24.4 | 28.6 | 33.9 | 34.9 | |||||||||
Ammunition
| Penetration statistics | |||||||
|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Penetration @ 0° Angle of Attack (mm) | |||||
| 10 m | 100 m | 500 m | 1,000 m | 1,500 m | 2,000 m | ||
| slpprj m/90 | APFSDS | 143 | 142 | 137 | 130 | 123 | 116 |
| slsgr m/90 | HE | 5 | 5 | 5 | 5 | 5 | 5 |
| kulsgr m/90 | HE-VT* | 5 | 5 | 5 | 5 | 5 | 5 |
| Shell details | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Velocity (m/s) |
Projectile Mass (kg) |
Fuse delay (m) |
Fuse sensitivity (mm) |
Explosive Mass (TNT equivalent) (g) |
Ricochet | ||
| 0% | 50% | 100% | |||||||
| slpprj m/90 | APFSDS | 1,465 | 0.25 | N/A | N/A | N/A | 78° | 80° | 81° |
| slsgr m/90 | HE | 988 | 0.96 | 0 | 0.1 | 174.4 | 79° | 80° | 81° |
| kulsgr m/90 | HE-VT* | 1,015 | 0.88 | 0 | 0.1 | 190.8 | 79° | 80° | 81° |
Ammo racks
| Full ammo |
1st rack empty |
2nd rack empty |
3rd rack empty |
4th rack empty |
5th rack empty |
6th rack empty |
Visual discrepancy |
|---|---|---|---|---|---|---|---|
| 234 | 186 (+48) | 138 (+96) | 90 (+144) | 42 (+192) | 24 (+210) | 0 (+234) | No |
Additional armament
| Rbs 56 missile | ||||
|---|---|---|---|---|
| Capacity (Belt) | Vertical | Horizontal | Stabilizer | |
| 8 (2) | -19°/+29° | N/A | N/A | |
Ammunition
| Penetration statistics | |||||||
|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Penetration @ 0° Angle of Attack (mm) | |||||
| 10 m | 100 m | 500 m | 1,000 m | 1,500 m | 2,000 m | ||
| RB 56 BILL II | ATGM | 510 | 510 | 510 | 510 | 510 | 510 |
| Shell details | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Velocity (m/s) |
Projectile Mass (kg) |
Fuse delay (m) |
Fuse sensitivity (mm) |
Explosive Mass (TNT equivalent) (g) |
Ricochet | ||
| 0% | 50% | 100% | |||||||
| RB 56 BILL II | ATGM | 250 | 10.9 | 0.05 | 0.1 | 2,720 | 80° | 82° | 90° |
Ammo racks
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| Full ammo |
Visual discrepancy |
|---|---|
| 8 | No |
Note:
- Missiles are modeled individually and disappear after having been launched.
- It is not possible to select how many missiles to bring into battle.
Machine guns
| 7.62 mm ksp 39 C | ||||
|---|---|---|---|---|
| Mount | Capacity (Belt) | Fire rate | Vertical | Horizontal |
| Coaxial | 4,000 (250) | 500 | N/A | N/A |
Usage in battles
The Strf_9040_BILL is a highly agile fighting machine, it offers great speed and handling. It’s relatively small size compared to other tanks on the battlefield allows it to hide and sneak up upon it’s prey, equipped with gunner thermal sights which work during the day Strf 9040 BILL can easily take advantage and prey on unexpecting tankers.
Along with a 40mm bofos cannon which offers up to 143 mm of penetration per round! The 143 mm is not able to penetrate every tank from the front, to overcome this, it is important to disorientate the enemy tanker. Blind its sights with the rapid fire from the 40 mm bofors. Then target it’s cannon, so it cannot fire back at you and one shot you like a pen going through a single piece of paper.
Once it’s cannon has been taken out, the enemy tank will retire either using smoke to cover it’s withdrawal or immediately going to reverse. If it goes into reverse without using smoke, knock out it’s track and flank it so the rear compartments can be shot at. The rear compartments (Engine bay and further towards the end of the tank) are the weakest. Shooting the engine will cause the engine to catch on fire, then shooting rounds along the side will knock out the crew.
If the enemy tanker reverses, goes over an object in it’s path and ends up exposing the underside (belly) of the tank, a few rounds targeted in this area from the 40 mm bofors will knock it out.
One of the key strategic competitive advantages which the Strf 9040 BILL has over it’s competitors is it’s Rbs 56 ATGM’s these ATGM’s are not like normal ATGM’s. Instead these explode over the target allowing the blast to penetrate the roof of the enemy tank and knock it’s crew out. This mean’s when any tank tries to use the terrain or an object to hide, fire the Rbs 56 ATGM towards the target but make sure it’s not to high about 3-5 feet above it for the best results. If the ATGM is too high when it explodes, the energy from the blast will be reduced and less damage will occur.
Air Threats:
One of the major weakness of the Strf 9040 BILL is it’s weak armour, this mean’s almost any round can penetrate the tank and knock it out. While it has great mobility the armour is weak which means air threats can easily destroy this tank. However, it does not mean it’s game over. Instead, it’s critical to find cover behind buildings to pop out, when the enemy aircraft fires at you, with draw behind it.
Helicopters: the best way to find an enemy helicopter is to use it’s thermal sights and can scan the air. It will be detected it can then be destroyed with the ATGM’s or the 40 mm autocannon with ease. To knock down the helicopter aim for the cockpit a few shots will destroy the helicopter. Using the ATGM, either directly hit the helicopter or allow it to fly over it.
Aircraft: These are fast, sneaky and powerful. The only way which it is possible to shoot them down is when they come towards you or when they overshoot you. However, most of the time it is incredibly be unlikely that you will shoot them down. Instead, it is important to stay alive and not get knocked out. To do this, use the terrain to hide and if that does not work, fire a few shots from you 40 mm bofors, this will deter them from engaging you.
Pros and cons
Pros:
- Lovely mobility
- Access to deadly top attack missiles, able to destroy enemy tanks hiding behind cover
- 40 mm APFSDS shreds tanks from the sides
- 40 mm HE-VT shells are very effective against enemy air vehicles
- Access to generation 2 thermals for both gunner and commander - Along with the CV90105 TML, the BILL is the only Strf 90 that has CITV
- Access to the scouting mechanic
- Wide FOV for the gunner
- Able to fire missiles on the move (albeit at the very slow speed of 5 km/h)
- Missile launchers do not explode when hit by enemy APFSDS shells
- Missile penetrates over 500 mm of steel - no roof of any armoured vehicle can withstand this
Cons:
- Tanks with ERA on top of the turret (especially Russian tanks have those) renders the missiles less effective
- Does not have access to the improved Slpprj m/01 APFSDS shell with 170 mm of penetration the Strf 9040C has
- Weak armour
- Two-plane stabilizer disengages at speeds over 10 km/h - when disengaging the stabilizer, the gun has the nasty tendency to swing violently up- or downwards
- It takes time to deploy the missile launcher before the missiles can be fired
- The 40 mm gun chews through ammo very quickly, and replenishing the first stage ammo rack takes time
- Only 6 missiles
- Missiles are sensitive to APS - tanks like the AMX-30B2 BRENUS and T-90A can deflect the missile
- Aiming too high above the enemy vehicle ensures the missile does next to no damage to said enemy vehicle
- Missiles are not useful against helicopters
- Missiles are less effective against tanks with lots of space between crew, ammo and modules (like the M1A1 and M1A2 Abrams)
- Low zoom in the gunsight
History
Describe the history of the creation and combat usage of the vehicle 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
- Videos
See also
- Other members of the CV90 family
- Strf 9040C - Base variant with a 40 mm autocannon.
- CV 90105 TML - Premium variant equipped with a 105 mm cannon.
- Lvkv 9040C - Self-propelled anti-aircraft variant with a higher elevation range for 40 mm cannon.
- CV 90120 - A variant with a 120 mm cannon.
External links
| Sweden light tanks | |
|---|---|
| L-60 | Strv m/38 · Strv m/39 · Strv m/39 TD · Strv m/40L |
| Strv m/41 | Strv m/41 S-I · Strv m/41 S-II |
| Ikv 91 | Ikv 91 · Ikv 91-105 |
| CV 90 | Strf 9040B · Strf 9040C · Strf 9040 BILL |
| CV 90105 · CV 90120 | |
| Wheeled | Pbil m/40 · U-SH 405 |
| Other | Strv m/31 · Strv 74 · Pbv 501 |
| Finland | Vickers Mk.E · ▄T-26E · BT-42 · ▄PT-76 · CV 9030FIN · CT-CV 105HP |
| Denmark | CV 9035DK |
