Difference between revisions of "Firefoam shell"

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{{Define|Crafted Resource
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{{Image wanted|reason=Images of fired AoE and one of stack AoE (1 shell and full stack designated by color) in a style similar to [[:File:Skip shield radius.jpg]]}}
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| always haulable = true
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{{infobox main|resource
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| image = Firefoam shell
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| name = Firefoam shell
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| def name = Shell_Firefoam
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| image = Shell firefoam a.png
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| description = A pressurized shell filled with fire-extinguishing foam. Can be fired from mortars or installed as a trap. Explodes when damaged.
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| description = A pressurized shell filled with fire-retardant foam. Can be fired from mortars or installed as a trap. Explodes when damaged.
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| draw gui overlay = true
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| type = Crafted Resources
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| graphic class = Graphic_Single
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| type2 = Mortar shell
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| graphic path = Things/Item/Resource/Shell/Shell_Firefoam
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| tech level = Industrial
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| label = firefoam shell
 
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| parent name = MakeableShellBase
 
 
| path cost = 15
 
| path cost = 15
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| resource readout priority = Middle
 
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| rotatable = false
 
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| selectable = true
 
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| sound drop = Standard_Drop
 
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| sound interact = Metal_Drop
 
 
| stack limit = 25
 
| stack limit = 25
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| thing class = ThingWithComps
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| beauty =  
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| ticker type = Normal
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| flammability = 1.0
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| use hit points = true
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| marketvalue = 55
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| deterioration rate base = 1.5
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| mass base = 1.25
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| flammability base = 1.0
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| hp = 60
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| market value base = 10
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| damage type = Extinguish
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| max hit points base = 70
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| damage = 0
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| mass = 3.5
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| deterioration = 1.5
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| velocity = 41
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| blastRadius =  5
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| skill 1 = Crafting
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| skill 1 level = 4
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| work to make = 800
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| production facility 1 = Machining table
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| research = Firefoam
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| resource 1 = Steel
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| resource 1 amount = 25
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| defName = Shell_Firefoam
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| thingCategories = MortarShells
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| tradeTags = MortarShells
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| page verified for version = 1.3.3066
 
}}
 
}}
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<onlyinclude>The [[firefoam shell]] is a type of [[mortar shell]]that upon exploding, spreads firefoam in a 5-tile radius, extinguishing all fires and preventing new ones.</onlyinclude>
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The '''firefoam shell''' is a type of [[mortar shell]] that upon exploding, spreads [[firefoam]] in a 5-tile radius, extinguishing all fires and preventing new ones.
  
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=== Crafting ===
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== Acquisition ==
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It is made using 25 [[steel]] at a [[machining table]].
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Firefoam shells are made using 25 [[steel]] at a [[machining table]] and requires [[Research#Firefoam|Firefoam]] to be researched. Requires a [[Skills#Crafting|Crafting skill]] of at least 4. The steel cost is increased to 35 if the [[AI_Storytellers#Player_tools|Classic Mortars]] difficulty option is enabled.
  
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=== Usage ===
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It can also be purchased from [[traders]].
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It is supposedly used for firefighting, due to the fire-extinguishing properties of the residual firefoam. It requires manual targeting to use, as colonists manning mortars don't automatically aim at fires.
 
  
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However, it is a very cost-ineffective and generally poor choice for this purpose; its tiny 5-tile radius isn't enough to cover large-scale fires, and it lacks the precision to be able to be dropped onto small fires accurately. Firing these shells to extinguish fires will quickly eat through your supply of steel. Moreover, it cannot extinguish fires inside base properly as the mortar's blind spot prohibits it from hitting fires close to it.
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== Summary ==
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When fired from a mortar, {{lc:{{P|Name}}}}s spreads [[firefoam]] in a {{P|Blast Radius}} tile radius, extinguishing all fires and preventing new ones.
  
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It does allow colonists incapable of firefighting to help with firefighting efforts, however, which can be handy if you need more hands on deck in controlling an out-of-control wildfire.
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When damaged beyond 70% of its health, it will explode after between {{ticks|30}} and {{ticks|60}}, spread firefoam in a radius around itself. The radius depends on the quantity in the stack, with a single shell covering a 9.9 tile radius, and expanding this radius proportional to the square root of the stack size times 0.4 up to a maximum radius of {{#expr: 9.9+((24*0.4)^0.5) round 2}} tiles at a full stack of 25.
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They are also used in the construction of [[IED firefoam  trap]]s.
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== Analysis ==
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Actually firing a firefoam shell from a mortar is very niche. The tiny, 5-tile radius isn't enough to cover large-scale fires, but mortars lack the precision to drop on small fires accurately. Due to the mortar's blind spot, it cannot extinguish fires inside your colony. For fires outside of your colony, the game will automatically start [[rain]] whenever fires get too big - unless a [[weather controller]]{{RoyaltyIcon}} is forcing fog. Generally, [[foam turret]]s or [[firefoam pop pack]]s are better as mobile fire extinguishers. Even [[Pyromaniac]]s can operate either.
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Firefoam shells are most useful to create [[IED firefoam trap]]s. IEDs must be directly lit on fire or triggered by a colonist, but are cheaper to create than a [[firefoam popper]], while having a much larger radius than the [[firefoam pop pack]]. In theory, destroying a firefoam shell creates the same firefoam as the IED trap for half the cost. However, the shell must be damaged to set off; while guns cannot damage the shell, gunshots ''can'' trigger an IED.
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== Gallery ==
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<gallery>
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Shell firefoam a.png|One firefoam shell
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Shell firefoam b.png|Partial stack
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Shell firefoam c.png|Full stack
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</gallery>
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== Version history ==
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* [[Version/0.18.1722|0.18.1722]] - Added.
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* [[Version/1.3.3066|1.3.3066]] - Steel requirement decreased from 35 -> 25 unless Classic Mortar difficulty option enabled.
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{{nav|security|wide}}
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[[Category: Mortar shells]]

Revision as of 22:57, 16 February 2023

Blindness.png
This page could use some more or updated images. You can help RimWorld Wiki by uploading images to make this page better. Note: Images of fired AoE and one of stack AoE (1 shell and full stack designated by color) in a style similar to File:Skip shield radius.jpg.

Firefoam shell

Firefoam shell

A pressurized shell filled with fire-retardant foam. Can be fired from mortars or installed as a trap. Explodes when damaged.

Base Stats

Type
Crafted Resources – Mortar shell
Tech Level
Industrial
Market Value
55 Silver
Stack Limit
25
Mass
1.25 kg
HP
60
Deterioration Rate
1.5
Flammability
100%
Path Cost
15

Ranged Combat

Damage
0 dmg (Extinguish)
Velocity
41 (m/s)
Blast Radius
5

Creation

Crafted At
Machining table
Required Research
Firefoam
Skill Required
Crafting 4
Work To Make
800 ticks (13.33 secs)
Resources to make
Steel 25
Technical
defName
Shell_Firefoam
thingCategories
MortarShells"MortarShells" is not in the list (Armor, Art, Artifact, BasicClothing, Clothing, ExoticMisc, ImplantEmpireCommon, ImplantEmpireRoyal, MortarShell, PsychicApparel, ...) of allowed values for the "TradeTags" property.
tradeTags
MortarShells


The firefoam shell is a type of mortar shell that upon exploding, spreads firefoam in a 5-tile radius, extinguishing all fires and preventing new ones.

Acquisition

Firefoam shells are made using 25 steel at a machining table and requires Firefoam to be researched. Requires a Crafting skill of at least 4. The steel cost is increased to 35 if the Classic Mortars difficulty option is enabled.

It can also be purchased from traders.

Summary

When fired from a mortar, firefoam shells spreads firefoam in a 5 tile radius, extinguishing all fires and preventing new ones.

When damaged beyond 70% of its health, it will explode after between 30 ticks (0.5 secs) and 60 ticks (1 sec), spread firefoam in a radius around itself. The radius depends on the quantity in the stack, with a single shell covering a 9.9 tile radius, and expanding this radius proportional to the square root of the stack size times 0.4 up to a maximum radius of 13 tiles at a full stack of 25.

They are also used in the construction of IED firefoam traps.

Analysis

Actually firing a firefoam shell from a mortar is very niche. The tiny, 5-tile radius isn't enough to cover large-scale fires, but mortars lack the precision to drop on small fires accurately. Due to the mortar's blind spot, it cannot extinguish fires inside your colony. For fires outside of your colony, the game will automatically start rain whenever fires get too big - unless a weather controllerContent added by the Royalty DLC is forcing fog. Generally, foam turrets or firefoam pop packs are better as mobile fire extinguishers. Even Pyromaniacs can operate either.

Firefoam shells are most useful to create IED firefoam traps. IEDs must be directly lit on fire or triggered by a colonist, but are cheaper to create than a firefoam popper, while having a much larger radius than the firefoam pop pack. In theory, destroying a firefoam shell creates the same firefoam as the IED trap for half the cost. However, the shell must be damaged to set off; while guns cannot damage the shell, gunshots can trigger an IED.

Gallery

  • One firefoam shell

  • Partial stack

  • Full stack

Version history

  • 0.18.1722 - Added.
  • 1.3.3066 - Steel requirement decreased from 35 -> 25 unless Classic Mortar difficulty option enabled.
Architect
Security
Barricade • Sandbags • Spike trap
(research)
Autocannon turret • Foam turret • Mini-turret • Rocketswarm launcher • Uranium slug turret • Mortar
IEDs
IED trap • IED incendiary trap • IED EMP trap • IED firefoam trap • IED smoke trap • IED antigrain warhead trap • IED tox trap Content added by the Biotech DLC
Related
Antigrain warhead • EMP shell • Firefoam shell • High-explosive shell • Incendiary shell • Smoke shell • Tox shell Content added by the Biotech DLC

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