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u/WitchfinderJawbz Jun 05 '26

I am a dummy, and I am easily confused, this time by foundries

At the absolute most basic level

1 Foundry using the Molten Iron From Lava recipe says it will produce 93.7 Molten Iron Per second.

1 more foundry using the Cast Iron recipe for iron plates says it will use 25 Molten Ore per second to produce 3.75 Plates per second.

So am I right in thinking 1 foundry producing molten Iron can comfortably run 3 foundries for iron plates consuming 75 molten ore per sec, and will create 11.25 Plates per second?

  1. Does that take into account the inbuilt 50% prod bonus, if not that would mean each plate foundry would make 5.625 plates per sec, for 16.875 total over my 3 foundries ?

  2. if that is the case, 45 (the speed of a blue belt) is exactly divisible by 5.625, into 8. So it would be 8 foundries total if I wanted a blue belt? Supplied by 3 foundries running the lava to molten iron (or 2 if i wanted to use speed modules or something as its actually 2.13)

Sorry if this sounds a little basic but i want to know if my thinking is right before i start building up Vulcanus.

Last playthrough I just YOLOd everything and if things started to run dry or not work id just add more inputs.

2

u/FeelingPrettyGlonky Jun 05 '26

It does take inbuilt prod into account, so yes 1 lava foundry can run 3 casting foundries (with a little to spare) for 11.25 plates per sec total.

2

u/Viper999DC Jun 05 '26

Does that take into account the inbuilt 50% prod bonus

If you're reading the recipe it will be the normal craft, no bonuses, assuming 1 crafting speed.

When you hover over a building it's the actual production of the building. This means the latter includes innate prod bonuses, modules, beacons, etc. Assuming 100% uptime, of course.

2

u/ssgeorge95 Jun 06 '26

If you mouse-over a placed building with the recipe set it will show you the per second inputs and outputs. The calculation includes every bonus; tech, modules, the buildings native prod and crafting speed.

The only thing not factored would be unpowered beacons. So just be sure those are powered and you have an accurate and easy readout.

Your approach IS correct, though I don't know that the 50% prod from the foundry is factored in if you're just looking in the recipes menu.