Difference between revisions of "Firefoam shell"

Latest revision as of 23:53, 28 September 2024

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[edit]

Firefoam shells can be crafted at a machining table once the firefoam research project has been completed. Each requires 25 Steel, 800 ticks (13.33 secs) of work modified by the general labor speed of the crafter, and a crafting skill of 4. The steel cost is increased to 35 if the Classic Mortars difficulty option is enabled.

It can also be purchased from traders.

Usage[edit]

Product	Ingredients	Type [ExpandCollapse]
IED firefoam trap	2	Building - Security

Summary[edit]

From smallest to largest, the radius of the shell's AoE when fired, when a single shell cooks off, and when an entire stack cooks off.

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[edit]

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 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[edit]

One firefoam shell
Partial stack
Full stack

Version history[edit]

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 • IED deadlife trap
Related: Antigrain warhead • EMP shell • Firefoam shell • High-explosive shell • Incendiary shell • Smoke shell • Tox shell • Deadlife shell

@@ Line 1: / Line 1: @@
-{{infobox main|resource|
+{{Infobox main|resource
 | name = Firefoam shell
-| image = Shell firefoam a.png
+| image = Shell firefoam c.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
+| type = Crafted resources
 | type2 = Mortar shell
-| path cost = 15
+| tech level = Industrial
+| path cost = 14
 | stack limit = 25
 | beauty =
@@ Line 26: / Line 27: @@
 | defName = Shell_Firefoam
 | thingCategories = MortarShells
-| tradeTags = MortarShells
+| tradeTags = MortarShell
 | page verified for version = 1.3.3066
 }}
@@ Line 32: / Line 33: @@
 == Acquisition ==
-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.
+{{Acquisition}} 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 ==
+[[File:Firefoam shell radius.png|thumb|left|From smallest to largest, the radius of the shell's AoE when fired, when a single shell cooks off, and when an entire stack cooks off.]]
 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.
+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.
-However, it is somewhat cost-ineffective, as 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. It cannot extinguish fires inside your colony properly as the mortar's blind spot prohibits it from hitting fires close to it.
-It does allow colonists incapable of firefighting such as [[Traits#Pyromaniac|Pyromaniacs]] to help with firefighting efforts, however, which can be handy if you need more hands on deck in controlling an out-of-control wildfire.
+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.
-The radius from an exploding firefoam shell is significantly larger than that of a fired firefoam shell. Depending on the purpose, placing a single shell and causing it to explode may be more efficient than firing it from a mortar. Indeed, as they will be set off by fire, it may be an effective alternative to [[firefoam popper]]s in some circumstances, trading a larger coverage radius for requiring outright damage to automatically set off.
+== 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.
-[[Category: Crafted Resource]]
+{{Nav|security|wide}}
 [[Category: Mortar shells]]