Rumble Cannon (Apocalypse)

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A powerful cannon which fires explosive shells over large distances. Its effectiveness is limited to static or slow moving targets.  From: Apocalypse Ufopaedia

Rumble Cannon

Craft RW HRum (Apocalypse).png
  • Weight: 140
  • Size: 4 × 4
  • Accuracy: 75%
  • Fire Rate: 5.14/sec
  • Firing Arc: 90º left/right
  • Firing Arc: 90º up/down
  • Range: 250m
  • Range Max: 650m
  • Style: road
  • Manufacturer: Megapol
  • Available: Week 1
  • Base Price: $1,000
  • Minimum Weekly Stock: 3
  • Maximum Weekly Stock: 8
  • Storage Space: 160
  • Damage: 34
  • Projectile Speed: 20
  • Ammo Capacity: recharges

Note: the UFOpaedia image (right) is an error. A Plasma Turret Cannon is shown in-game. The Equip Screen image (left) is correct and shows a Rumble Cannon.

The Rumble Cannon is one of the most powerful weapons that exists in Mega-Primus, capable of launching a rapid barrage of powerful shells at targets. Though not individually powerful or very accurate, the shells are fired in great numbers and each shell can easily punch through even the toughest of the capital class UFO hulls. It does not require ammunition.

The Rumble cannon unfortunately suffers from several serious flaws that do not allow the cannon to be put to its fullest potential. The effective range of the cannon is very short, meaning the vehicle needs to be up close to the target before it can lay waste to it. The cannon also has a limited firing arc, quite debilitating as the vehicle can not choose its facing. Perhaps the biggest crippling factor is that it is limited to a ground based vehicle, the Griffon AFV. This severely restricts its ability to intercept UFOs unless the tanks are strategically placed around the city.

In practice, the Rumble Cannon is nearly useless if your goal is to attack UFOs. That role is most reliably accomplished with the tank's GLM Air Defense. However with manual control the high powered shells are extremely effective at tearing down Megaprimus. This can be useful to deal massive damage to XCOM's enemies like the Cult of Sirius or just for kicks. A lucky Commander may also direct this weapon against the largest UFOs, but will have an easier time using the Plasma Turret Cannon instead.

The Rumble Cannon is the standard weapon mounted on a Griffon AFV fresh from the manufacturer. With the Griffon AFV being the only land based vehicle capable of mounting the Rumble Cannon, there is no need to ever purchase a new cannon unless you sell them.

Note that some images of the cannon are switched with the Plasma Turret Cannon .

Apocalypse Insignia X-COM: Apocalypse\Vehicles\Vehicle Equipment
Weapons Apoc 40mm auto cannon.png 40mm Auto-Cannon
Apoc bolter laser gun.png Bolter 4K Laser Gun Apoc lancer laser gun.png Lancer 7K Laser Gun
Apoc rendor plasma gun.png Rendor Plasma Gun Apoc lineage plasma cannon.png Lineage Plasma Cannon Apoc plasma multi system.png Plasma Multi-System
Apoc janitor missile array.png Janitor Missile Array Apoc prophet missile launcher.png Prophet Missile Array Apoc justice missile launcher.png Justice Missile Launcher Apoc retribution missile launcher.png Retribution Missile Launcher
Apoc laser defense array.png Laser Defense Array Apoc plasma defense array.png Plasma Defense Array

Apoc light disruptor beam.png Light Disruptor Beam Apoc medium disruptor beam.png Medium Disruptor Beam Apoc heavy disruptor beam.png Heavy Disruptor Beam
Apoc disruptor bomb launcher.png Disruptor Bomb Launcher Apoc disruptor multi bomb launcher.png Disruptor Multi-Bomb Launcher
Apoc stasis bomb launcher.png Stasis Bomb Launcher

Engines SD Standard
SD Deluxe
SD Sports
SD Turbo
SD Elite
SD Special
Weapons Apoc 40mm auto cannon turret.png 40mm Auto Cannon Turret Apoc airguard anti air cannon.png Airguard Anti-Air Cannon Apoc glm array.png GLM Array
Apoc plasma turret cannon.png Plasma Turret Cannon Apoc glm air defense.png GLM Air Defense Apoc rumble cannon.png Rumble Cannon
Engines Metro Roadhog
Metro Roadgrav
Metro Turbograv
Metro Powergrav
Metro Multipower Plus
Add-Ons Weapons Control System (Light, Medium, Heavy, Advanced)
Transport Module (Cargo, Passenger, Bio-Transport)
Small / Large Disruption Shield
Missile Evasion Matrix, Cloaking Field