Editing Firefoam shell

{{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]]}}
{{Infobox main|resource
| name = Firefoam shell
| image = Shell firefoam a.png
| description = A pressurized shell filled with fire-retardant foam. Can be fired from mortars or installed as a trap. Explodes when damaged.
| type = Crafted Resources
| type2 = Mortar shell
| tech level = Industrial
| path cost = 14
| stack limit = 25
| beauty = 
| flammability = 1.0
| marketvalue = 55
| mass base = 1.25
| hp = 60
| damage type = Extinguish
| damage = 0
| deterioration = 1.5
| velocity = 41
| blastRadius =  5
| skill 1 = Crafting
| skill 1 level = 4
| work to make = 800
| production facility 1 = Machining table
| research = Firefoam
| resource 1 = Steel
| resource 1 amount = 25
| defName = Shell_Firefoam
| thingCategories = MortarShells
| tradeTags = MortarShell
| page verified for version = 1.3.3066
}}
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 can be crafted at a [[{{P|Production Facility 1}}]] once the [[Research#{{P|Required Research}}|{{P|Required Research}}]] research project has been completed. They require {{Required Resources}}, {{Ticks|{{P|Work To Make}}}} of work, and a [[{{P|Skill 1}}]] skill of {{P|Skill 1 Level}}. The steel cost is increased to 35 if the [[AI Storytellers#Classic mortars|Classic Mortars]] difficulty option is enabled.

It can also be purchased from [[traders]].

== Usage ==
{{Ingredient List|noCollapse=true}}

== Summary ==
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.

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.

They are also used in the construction of [[IED firefoam  trap]]s.

== Analysis ==
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. 

However, it is a very niche item. The tiny, 5-tile radius isn't enough to cover large-scale fires. Meanwhile, it lacks the precision to drop on small fires accurately.  It cannot extinguish fires inside your colony properly as the mortar's blind spot prohibits it from hitting fires close to it. And unless a [[weather controller]]{{RoyaltyIcon}} is forcing fog, then the game will cause [[rain]] whenever fires get too big. Generally, [[foam turret]]s or [[firefoam pop pack]]s are better as mobile fire extinguishers. Even [[Traits#Pyromaniac|Pyromaniacs]] can operate either

The radius from an exploding firefoam shell is significantly larger than a fired shell or [[firefoam popper]]. The mortar shell will require outright damage to set off, but is cheaper than the popper and larger than a fired shell.

== Gallery ==
<gallery>
Shell firefoam a.png|One firefoam shell
Shell firefoam b.png|Partial stack
Shell firefoam c.png|Full stack
</gallery>

== Version history ==
* [[Version/0.18.1722|0.18.1722]] - Added.
* [[Version/1.3.3066|1.3.3066]] - Steel requirement decreased from 35 -> 25 unless Classic Mortar difficulty option enabled.

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[[Category: Mortar shells]]