Lago I

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Lago I
GarageImage Lago I.jpg
Lago I
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The Lago I was a Swedish medium tank, developed for export to Hungary. However, Hungary chose to design their own medium tank, with the help of Škoda, and the project was cancelled. It was not until later that the Lago I was trialed by the Swedish army and further developed to the Strv m/42, where it would have a long service life.

The Lago I was introduced in Update 1.97 "Viking Fury". It has a similar playstyle to an early Pz.III, being quite fast and manoeuvrable but not having the greatest in terms of firepower output. The Lago I does have access to post-war APDS rounds with great penetration, giving it the upper hand in long-range engagements where its angled armour can protect the vehicle well. The small breech of the vehicle also give it great gun depression, making it able to peek over hills to engage with hostiles without endangering itself.

General info

Survivability and armour

Armourfront / side / back
Hull34 / 34 / 24
Turret34 / 28 / 20
Crew5 people
Visibility84 %
Armour Front (Slope angle) Sides Rear Roof
Hull 34 mm (13°) Upper Plate
20 mm + 24 mm (spherical) MG port
20 mm (76°-81°) Upper Glacis - Top
15 mm (48°-77°) Upper Glacis - Bottom
34 mm (cylindrical) Lower Glacis - Top
34 mm (60°) Lower Glacis - Bottom
24 mm Top - Front
24+10 mm Top - Rear
34 mm Bottom
24 mm (8°) Upper plate
24 mm (32°) Lower glacis
9 mm
Turret 34 mm (20°-80°) Turret front
20 mm (0°-48°) Gun mantlet
20 mm (Rounded) Machine Gun Port
38 mm 20 mm Lower
15 mm Upper
20 mm Front
9 mm Rear
Cupola 34 mm (23°) 28 mm 28 mm 9 mm


  • Turret ring: 30 mm
  • Turret ring guard: 30 mm
  • Tracks and suspension: 15 mm
  • Fenders: 4 mm


Speedforward / back
AB51 / 7 km/h
RB and SB46 / 7 km/h
Number of gears6 forward
1 back
Weight17.8 t
Engine power
AB544 hp
RB and SB285 hp
Power-to-weight ratio
AB30.6 hp/t
RB and SB16.0 hp/t
Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade 51 7 17.8 442 544 24.83 30.56
Realistic 46 7 252 285 14.16 16.01

Modifications and economy

Repair costBasic → Reference
AB566 → 728 Sl icon.png
RB638 → 821 Sl icon.png
SB767 → 987 Sl icon.png
Total cost of modifications8 400 Rp icon.png
9 490 Sl icon.png
Talisman cost640 Ge icon.png
Crew training4 500 Sl icon.png
Experts16 000 Sl icon.png
Aces160 Ge icon.png
Research Aces190 000 Rp icon.png
Reward for battleAB / RB / SB
30 / 50 / 60 % Sl icon.png
118 / 118 / 118 % Rp icon.png
Mobility Protection Firepower
Mods new tank traks.png
560 Rp icon.png
630 Sl icon.png
95 Ge icon.png
Mods new tank suspension.png
380 Rp icon.png
430 Sl icon.png
65 Ge icon.png
Mods new tank break.png
Brake System
380 Rp icon.png
430 Sl icon.png
65 Ge icon.png
Mods new tank filter.png
700 Rp icon.png
790 Sl icon.png
115 Ge icon.png
Mods new tank transmission.png
680 Rp icon.png
770 Sl icon.png
115 Ge icon.png
Mods new tank engine.png
680 Rp icon.png
770 Sl icon.png
115 Ge icon.png
Mods tank tool kit.png
Improved Parts
560 Rp icon.png
630 Sl icon.png
95 Ge icon.png
Mods extinguisher.png
Improved FPE
380 Rp icon.png
430 Sl icon.png
65 Ge icon.png
Mods tank reinforcement sw.png
Crew Replenishment
700 Rp icon.png
790 Sl icon.png
115 Ge icon.png
Mods new tank horizontal aiming.png
Horizontal Drive
560 Rp icon.png
630 Sl icon.png
95 Ge icon.png
Mods tank cannon.png
Adjustment of Fire
380 Rp icon.png
430 Sl icon.png
65 Ge icon.png
Mods tank ammo.png
380 Rp icon.png
430 Sl icon.png
65 Ge icon.png
Mods new tank vertical aiming.png
Elevation Mechanism
700 Rp icon.png
790 Sl icon.png
115 Ge icon.png
Mods art support.png
Artillery Support
680 Rp icon.png
770 Sl icon.png
115 Ge icon.png
Mods tank ammo.png
680 Rp icon.png
770 Sl icon.png
115 Ge icon.png


Main armament

Ammunition100 rounds
Reloadbasic crew → aces
4.1 → 3.1 s
Vertical guidance-10° / 20°
Main article: kan m/38 (37 mm)
37 mm kan m/38 Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 100 -10°/+20° ±180° N/A 18.6 25.7 31.2 34.5 36.7 4.03 3.57 3.29 3.10
Realistic 11.6 13.6 16.6 18.3 19.5


Penetration statistics
Ammunition Type of
Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
slpprj m/38 APBC 59 55 41 28 19 13
slpgr m/39 APHE 55 51 37 26 17 12
3,7 cm slpprj m/49 APDS 115 111 95 78 64 52
Shell details
Ammunition Type of
mass (kg)
Fuse delay
Fuse sensitivity
Explosive mass
(TNT equivalent) (g)
0% 50% 100%
slpprj m/38 APBC 785 0.74 - - - 47° 60° 65°
slpgr m/39 APHE 800 0.74 1.2 9 15 47° 60° 65°
3,7 cm slpprj m/49 APDS 1,150 0.3 - - - 75° 78° 80°

Ammo racks

rack empty
rack empty
rack empty
rack empty
rack empty
rack empty
rack empty
rack empty
rack empty
rack empty
rack empty
100 81 (+19) 71 (+29) 61 (+39) 51 (+49) 41 (+59) 34 (+66) 28 (+72) 21 (+79) 14 (+86) (+92) (+99) No
Ammo racks of the Lago I


  • As they are modeled by sets of 3 to 5, shells disappear from the rack only after you've fired all shells in the set.

Machine guns

Ammunition2 250 rounds
Belt capacity250 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate649 shots/min
Main article: ksp m/36 (8 mm)

The Lago I is armed with a 8 mm ksp m36 machine gun, useful for hitting lightly armoured AA vehicles.

8 mm ksp m/36
Mount Capacity (Belt) Fire rate Vertical Horizontal
Coaxial 2,250 (250) 649 N/A N/A

Usage in battles

The Lago I is a medium tank one has to get used to. It has a 37 mm gun with a short barrel similar to that of the early Panzer III's 37 mm KwK 36, which gives it inadequate penetration against better-armoured targets. Enemy tanks with an effective armour of above 55-60 mm will be a concern against the stock shell slpprj m/38 and the upgraded slprg m/39, but the 3,7cm slpprj m/49 might be sufficient when it is unlocked.

The armour of the Lago I might look weak with it being 34 mm maximum at the front, giving it a similar armour to that of a light tank, but it can still bounce shells with its angled armour. Angling the armour gives the Lago I more effective armour than it actually has, which can make it a difficult tank for inexperienced tankers to fight. But even while angled, the Lago I has lots of weak spots in the front where its armour is less than 34 mm thick or is flat, which makes it vulnerable to most tanks at its BR.

The Lago I has a great power-to-weight ratio, giving it an excellent acceleration and manoeuvrability. Use its great acceleration to get into positions where the slpprj m/38 and slprg m/39 will actually penetrate the enemy vehicle. The Lago I equipped with slpprj m/49 can pose a serious threat to more heavily armoured vehicles like the B1 ter and M4A3 (105) as the sabot has excellent penetration for its BR. However, sabot rounds have poor post-penetration damage and you should therefore aim to disable the enemy crew rather than try to knock out the whole vehicle.

The Lago I's engine also allows it to reach its top speed fast, having great acceleration can make a huge different when it comes to survival. Being able to avoid shells with its narrow and small silhouette, it can move around the battlefield quickly like a light tank, however it has one drawback as its limited speed of 45 km/h makes it slower than a light tank, though this is still an adequate speed to move around slower targets and to pose a serious threat. But it also has a slow reverse speed of -7 km/h which makes it harder to hide after peeking around a corner after taking a shot or fire off a shot.

Enemies worth noting:

  • B1 bis/ter: Can pose a serious threat to the Lago I if unattended, the B1's 47 mm can penetrate the Lago I if gets into close combat. The 75 mm can also pose a serious threat to the Lago I if the shell hits. If the Lago I is not equipped with the slpprj m/49 APDS round, it will have a struggle to defeat the armour of the B1, specially against the more armoured version Ter which puts the Lago I in a huge disadvantage if fighting in close quarters. If equipped with slpprj m/49, the B1's can be fought at distance where the Lago I will have the advantage.
  • M4 Sherman: Low rank Shermans like the M4A1 and M4A3 (105) can pose a serious threat, having mobility and guns capable of eliminate the Lago I with ease. Their short 75 mm and 105 mm can easily penetrate the Lago I and close range and at distance. These are highly dangerous enemies for the Lago I even if equipped with APDS rounds. The angled armour of the Shermans can easily bounce the 37 mm rounds of the Lago. You must be more careful where you aim when fighting Shermans. But even if the Shermans are a dangerous target, they are not invincible for the Lago I can deliver a well-placed shot, or a flanking manoeuvre could give the Lago the penetration it needs to cause serious damage to the Shermans.
  • T-34: The T-34 is also one of the tanks the Lago I needs to be wary of, T-34 is a threat for inexperienced Lago I users. The sloped hull of the T-34 can bounce most APDS and APCBC rounds, but the T-34's turret is a weak spot making them less of a threat than Sherman tanks.

Pros and cons


  • Still effective in uptiers, since it has access to a high-penetrating APDS shell with an amazing 115 mm of penetration and high velocity
  • -10 degrees gun depression means that it can adapt to different terrains well
  • Quite fast and mobile
  • Sufficient power to weight ratio ensures good mobility even on bad terrain
  • Good turret traverse speed
  • Small target profile
  • Short reload time


  • Terrible stock grind - APDS is the only acceptable shell for the battle rating, and it is a tier IV modification, while the other shells are extremely weak and wholly inadequate for the opponents you will have to face
  • Armour is inadequate to resist any shells, even a Panzer II can penetrate it frontally
  • Roof armour can be penetrated by common aircraft armaments such as the 12.7 mm M2, and 15 mm MG 151


The Landsverk Lago was an interwar medium tank design. It was designed in 1936 as an export medium tank by Landsverk. One prototype was made to be sent to Hungary for trials, but the Swedish government banned exporting military equipment. As such, the Lago was given to the Swedish military for trials. There were six Lago prototypes. The Lago I had a twin 140 hp engine, a crew of five, a 37 mm Bofors cannon, and 3 machine guns. It weighed 15 tonnes. The Lago never reached the production phase, but it became the basis of the Strv m/42, which saw lengthy service in the Swedish military.


During the 1930's, the Swedish Landsverk company, like many other European arms manufacturers, wished to capitalize on the growing tensions on the continent in order to secure new production and licencing contracts. Among the most profitable markets was the one for new armoured fighting vehicles. As a result, Landsverk began developing a whole range of new combat vehicles during the 1930's, aimed solely at the export market.

Among them was the L-60 light tank, whose basis Landswerk used to develop the larger and heavier Lago tank. While the L-60 saw some commercial success, the Lago tank received little interest from foreign customers. However, after some time passed, the Swedish military changed their doctrine and sought to procure a medium tank themselves. Given that Landsverk already developed the Lago, Swedish military officials turned to the company with the orders to further develop the design.

In the end, the Lago tank went through multiple prototype stages and was ultimately used only as a testbed for the development of the subsequent Strv m/42 and Pvkv m/43 tanks. The vehicle never had any production orders and didn't take active part in any conflicts. Due to its design however, the Lago I can be seen as the first true domestically built Swedish medium tank.



See also

Related development
Similar role

External links


AB Landsverk
Light Tanks 
L-10  Strv m/31
L-60  Strv m/38 · Strv m/39 · Strv m/40L
Pbil m/40  Pbil m/40
Strv 74  Strv 74
Unimog 404  U-SH 405
Medium Tanks 
Lago  Lago I · Strv m/42 EH · Ikv 73 · Strv m/42 DT
Tank Destroyers 
Ikv 72  Ikv 72 · Ikv 103
Pvkv m/43  Pvkv m/43 (1946) · Pvkv m/43 (1963)
Pvkv II/III  Pvkv II · Pvkv III
SPAA  Pvlvv fm/42 · L-62 ANTI II

Sweden medium tanks
Strv m/42  Lago I · Strv m/42 EH · Ikv 73 · Strv m/42 DT · Pvkv IV
Centurion derivatives  Strv 81 · Strv 81 (RB 52) · Strv 101 · Strv 104 · Strv 105
Strv 103  Strv 103-0 · Strv 103A · Strv 103С
Strv 121/122  Strv 121 · Christian II · Strv 122A · Strv 122B PLSS · Strv 122B+
Other  Sherman III/IV · T 80 U
WWII  ▄T-28 · ▄T-34 · ▄Pz.IV · ▄T-34-85
Post War  ▄Comet I · ▄Charioteer Mk VII · ▄T-54 · ▄T-55M · ▄T-72M1 · ▄Leopard 2A4 · ▄Leopard 2A6
Norway  Leopard 1A5NO2