Team : Hawk Republic # IS-1 Role : Heavy Tank ## Addons | Addon | Cost | | ------------ | ------------ | | 100mm Cannon | 1,000 points | ## [General information](/md/rv/vehicles/is-1.md#general-information) Description : The **IS-1** is a Heavy Tank and the first of the Soviet Iosif Stalin series, developed in 1943 as a successor to the KV line and initially armed with an 85 mm gun before the [IS-2](/md/rv/vehicles/is-2-1944.md)'s 122 mm was adopted. It is a tracked vehicle weighing 44 tonnes with a crew of four — driver, gunner, commander, and loader. The **V-2IS** diesel delivers 520 horsepower for 11.8 hp/t and a maximum speed of 37 km/h. Main armament is the **85mm D-5S** cannon with a coaxial **7.62mm DT-28**; the commander has a stabilized **7.62mm DT-28** cupola and the driver a hull **7.62mm DT-28**. Sights are 2.5x telescope and periscope with no rangefinder. This vehicle features a single addon: **100mm Cannon**. The 100mm Cannon addon costs 1000 points and replaces the stock 85mm D-5S with the more powerful 100mm D-10T cannon. This modification completely overhauls the vehicle's ammunition suite: the BR-365 APHEBC is replaced by the BR-412B APHEBC, providing an additional 83 mm of maximum penetration (increasing from 135 mm to 218 mm). Furthermore, the O-365K HE shell is replaced by the OF-412, which nearly doubles the explosive mass (from 0.74 kg to 1.46 kg). These improvements in lethality come with the trade-off of a slower reload rate, which increases from 7.84 seconds to 10.5 seconds. Locomotion : Tracked Supported classes : Crewman Obtainment : Shop Price : 50,000 money ## [In-game availability](/md/rv/vehicles/is-1.md#in-game-availability) | Team/Loadout | [WW2](/md/rv/loadouts/ww2.md) | | ---------------------------------------------- | ----------------------------- | | [Hawk Republic](/md/rv/teams/hawk-republic.md) | Tier 3 | ## Addons | Addon | Cost | | ------------ | ------------ | | 100mm Cannon | 1,000 points | ## [Vehicle](/md/rv/vehicles/is-1.md#vehicle) | Weight | 44 t | | ---------------- | --------- | | Seating capacity | 4 | | Driver | 1 | | Gunner | 1 | | Commander | 1 | | Loader | 1 | | Max speed | | | Forward | 37 km/h | | Backward | 14.3 km/h | ## [Powertrain](/md/rv/vehicles/is-1.md#powertrain) | Engine | V-2IS | | --------------------- | --------- | | Type | Diesel | | Max RPM | 2,000 RPM | | Horsepower | 520 hp | | Power-to-weight ratio | 11.8 hp/t | | Transmission | | | Forward gears | 8 | | Reverse gears | 2 | ## [Armour](/md/rv/vehicles/is-1.md#armour) | Lower front plate | 114 mm–144 mm | | ----------------- | ------------- | | Upper front plate | 131 mm–217 mm | | Left cheek | 200 mm–687 mm | | Right cheek | 190 mm–611 mm | | Mantlet | 100 mm–142 mm | | Hull side | 90 mm–110 mm | ## [Gunner turret](/md/rv/vehicles/is-1.md#gunner-turret) | Traversal | | | ---------------- | ---------- | | Horizontal speed | 14.4 deg/s | | Vertical speed | 5 deg/s | | Vertical limits | -5° / 25° | ### [Weapons](/md/rv/vehicles/is-1.md#gunner-turret-weapons) #### [85mm D-5S](/md/rv/vehicles/is-1.md#gunner-turret-weapon-85mm-d-5s) | Reload speed | 7.84s | | --------------------------------------------- | ----- | | Refill speed | 6s | | Ammo | Max | | [BR-365](/md/rv/shells/85mm-d-5s-br-365.md) | \* | | [O-365K](/md/rv/shells/85mm-d-5s-o-365k.md) | \* | | [BR-365P](/md/rv/shells/85mm-d-5s-br-365p.md) | \* | | Ammo models | | | Turret ammo | 25 | | Hull ammo | 34 | #### [7.62mm DT-28](/md/rv/vehicles/is-1.md#gunner-turret-weapon-762mm-dt-28) | Reload speed | 6s | | ------------------------------------- | --- | | Magazine size | 63 | | Ammo | Max | | [AP](/md/rv/shells/762mm-dt-28-ap.md) | \* | | Ammo models | | | MG ammo | 40 | ### [Sights](/md/rv/vehicles/is-1.md#gunner-turret-sights) #### [Telescope sight](/md/rv/vehicles/is-1.md#gunner-turret-sight-1) | Rangefinder | None | | ----------- | ---- | | Zoom | 2.5x | #### [Periscope sight](/md/rv/vehicles/is-1.md#gunner-turret-sight-2) | Rangefinder | None | | ----------- | ---- | | Zoom | 2.5x | ## [Commander turret](/md/rv/vehicles/is-1.md#commander-turret) | Traversal | | | ---------------- | ---------- | | Mouse aim | Yes | | Horizontal speed | 60 deg/s | | Vertical speed | 60 deg/s | | Vertical limits | -15° / 15° | ### [Weapons](/md/rv/vehicles/is-1.md#commander-turret-weapons) #### [7.62mm DT-28](/md/rv/vehicles/is-1.md#commander-turret-weapon-762mm-dt-28) | Reload speed | 6s | | ------------------------------------- | --- | | Magazine size | 63 | | Ammo | Max | | [AP](/md/rv/shells/762mm-dt-28-ap.md) | \* | | Ammo models | | | MG ammo | 40 | ### [Sights](/md/rv/vehicles/is-1.md#commander-turret-sights) #### [Sight 1](/md/rv/vehicles/is-1.md#commander-turret-sight-1) | Rangefinder | None | | ----------- | ---- | | Zoom | 1x | ## [Driver turret](/md/rv/vehicles/is-1.md#driver-turret) | Traversal | | | ---------------- | ---------- | | Horizontal speed | 45 deg/s | | Vertical speed | 45 deg/s | | Vertical limits | -10° / 10° | ### [Weapons](/md/rv/vehicles/is-1.md#driver-turret-weapons) #### [7.62mm DT-28](/md/rv/vehicles/is-1.md#driver-turret-weapon-762mm-dt-28) | Reload speed | 6s | | ------------------------------------- | --- | | Magazine size | 63 | | Ammo | Max | | [AP](/md/rv/shells/762mm-dt-28-ap.md) | \* | | Ammo models | | | MG ammo | 4 | ### [Sights](/md/rv/vehicles/is-1.md#driver-turret-sights) #### [Sight 1](/md/rv/vehicles/is-1.md#driver-turret-sight-1) | Rangefinder | None | | ----------- | ---- | | Zoom | 1x | ## [Gallery](/md/rv/vehicles/is-1.md#gallery) | Type | URL | | --------- | ------------------------------------------------------------------- | | Thumbnail | https://cdn.astrid.ovh/public-stats-images/is-1/perspective.png | | Front | https://cdn.astrid.ovh/public-stats-images/is-1/front.png | | Back | https://cdn.astrid.ovh/public-stats-images/is-1/back.png | | Left | https://cdn.astrid.ovh/public-stats-images/is-1/left.png | | Right | https://cdn.astrid.ovh/public-stats-images/is-1/right.png | | Top | https://cdn.astrid.ovh/public-stats-images/is-1/top.png | | Armor | https://cdn.astrid.ovh/public-stats-images/is-1/armor_thumbnail.png | ID: "IS-1"