Jumbo Furnace in FTB Skies 2

Jumbo Furnace is part of the pack's mod list, and this pack ships version 5.0.0.9 of it (the file is jumbofurnace-5.0.0.9.jar). The mod list shows it was already included by the 1.22.0 release or earlier.^[1]

Unverified The sources I have only confirm that the mod is installed and which version it is. They don't describe what it does, who it suits, or how the pack changes its recipes or configs, so I can't say how it fits into progression. No quests and no ATM Star path steps are confirmed to involve it. Check in-game before you plan around it.

Getting started with the Jumbo Furnace is simple, because there is only one thing to build first. It is a multiblock, so you make it out of regular furnaces.^[2]

Step by step

1. Collect 27 furnaces. The Jumbo Furnace is built from a 3x3x3 cube of them, so that is your whole shopping list for the first build.^[2]
2. Place the 27 furnaces in a 3x3x3 cube. Once the cube is complete, you have assembled the Jumbo Furnace.^[2]
3. If you want the Jumbo Furnace as an item, use the recipe below. In this pack it is a jumbo smelting recipe from the mod, and the mod's own advancement text says you can create the item by smelting 27 furnaces in a Jumbo Furnace.^[2][3]

Jumbo FurnaceMod recipe

Jumbo Smelting (jumbofurnace)

• 27× any furnace player workstations

Recipe id: jumbofurnace:jumbo_furnace

This is the in-pack recipe for the Jumbo Furnace item, and it uses the mod's jumbo smelting recipe type.

Why make more of them?

Extra Jumbo Furnace items are not just spares. You can put them in the upgrade slot of a Jumbo Furnace to increase the number of recipes it can smelt per cooking cycle.^[2]

The mod also tracks upgrading with advancements. One of them asks you to fully upgrade a Jumbo Furnace with a full stack of 64 Jumbo Furnaces.^[2]

The Jumbo Furnace is a multiblock smelter. You build it from regular furnaces instead of crafting one block. Here is everything the sources confirm about how it works in this pack.^[2]

Building it

Place 27 furnaces in a 3x3x3 cube and they assemble into a Jumbo Furnace. The mod has an advancement for exactly this, so you'll know when it worked.^[2]

You can also get the Jumbo Furnace as an item. The mod's advancement text says you can do this by smelting 27 furnaces in a Jumbo Furnace. The pack's recipe uses the mod's own jumbo smelting recipe type, and it accepts any block from the furnace workstation tag as the input.^[2][3]

Jumbo FurnaceMod recipe

Jumbo Smelting (jumbofurnace)

• 27× any furnace player workstations

Recipe id: jumbofurnace:jumbo_furnace

Upgrading

A Jumbo Furnace has an upgrade slot. Put Jumbo Furnace items in it and the furnace can smelt more recipes per cooking cycle. The mod's tooltip describes the upgrade this way.^[2]

The advancements show how far the upgrades go. A single Jumbo Furnace item is enough to upgrade your furnace. A full upgrade takes a full stack of 64 Jumbo Furnaces.^[2]

Taking it apart

In this pack, [[config:config/jumbofurnace-server.toml#Construction Settings.shearable]] is set to true. That means you can dismantle a Jumbo Furnace cleanly with shears.^[4]

Unverified The sources don't cover fuel use, smelting speed, automation with hoppers or pipes, or what the upgrade slot accepts beyond Jumbo Furnace items. Check these in-game before you build an automated setup around the furnace.

The only progression detail the pack data confirms for the Jumbo Furnace is how you get it. There is a single recipe for it, and the pack data labels it as the mod's own recipe, so nothing here shows the pack changing it.^[3]

Jumbo FurnaceMod recipe

Jumbo Smelting (jumbofurnace)

• 27× any furnace player workstations

Recipe id: jumbofurnace:jumbo_furnace

This is the only in-pack recipe that makes the Jumbo Furnace, and the pack data lists it as a mod recipe.

The pack data shows no other recipes that produce Jumbo Furnace items, so there is no tier ladder to climb for this mod. You craft the one item and that is the whole path.^[3]

Unverified The sources here show no quests involving the Jumbo Furnace, and no tier breakdown or upgrade path for it. If the pack's quest book mentions it anywhere, that is not shown in the sources used for this guide.

The Jumbo Furnace has one quest in the pack, and it sits in the "Useful Items & Tips" chapter. That chapter is chapter 2 of 41 in the quest book and holds 29 quests.^[5]

Bigger & Better

The quest is "Bigger & Better" quest. It asks you to build a 3x3x3 of Furnaces to create the Jumbo Furnace. Its task is an advancement rather than an item you hand in.^[5]

The quest text also explains what you get. The Jumbo Furnace can process multiple recipes at the same time. You can upgrade it by putting more Jumbo Furnaces in the bottom-right slot, up to 64. Each one represents the number of items it can smelt at once.^[5]

The rest of the chapter

"Tips & Tricks!" quest is the chapter's intro checkmark. It says the chapter is full of useful items and tips for your playthrough. The Jumbo Furnace quest sits among other utility quests such as "All-In-One Tools" quest, "Simple Magnets" quest and "Packing Tape" quest.^[5]

The sources I have don't say which quest comes before or after Bigger & Better in the chapter's layout, so I can't give you an exact order for this one.^[5]

The only Jumbo Furnace setting the pack's files show is [[config:config/jumbofurnace-server.toml#Construction Settings.shearable]], and it's a handy one. In this pack it's set to true, which means you can cleanly dismantle a jumbo furnace with shears instead of tearing it apart.^[4]

Unverified The pack file doesn't say what the mod's default for this option is, so I can't tell you whether the pack changed it. No other Jumbo Furnace config values are available here, so I'm leaving them out rather than guessing.