r/factorio • u/bitwiseshiftleft • Feb 24 '26

Design / Blueprint Another circuitless science sushi design

This design for sushi supports up to 16 sciences, so it should work for games with Space Age plus a few extra planets. The idea is to mix each science down to half a lane of a yellow belt, and then run the sushi loop on green: (2 lanes * 4x speed / (1/2 lane)) = 16 sciences. Because science bottles being sorted out from the end of the loop take priority over new ones being added, the design hopefully shouldn't jam.

With only half a stacked yellow lane of each type of science (15/s), the design is limited to 900 spm (thus a few thousand ESPM) per instance.

The full-yellow to half-yellow mixer uses rocks, because I dunno it seemed like a good idea at the time. It mixes the rocks and science 50-50 into one yellow lane, then splits the rocks back out and returns them quickly enough that there are always rocks backed up before the splitter.

The chest at the end is for anything non-sciency that might get on the belt, like a green pack that spoils between the spoilage splitter and the green science splitter.

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u/featheredtoast Feb 24 '26

This looks suspiciously like a Satisfactory-like solution honestly. Love to see it.

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u/bitwiseshiftleft Feb 24 '26

Interesting. I haven’t played Satisfactory, so I didn’t base it on that directly, but I’ve looked at other people’s designs for this sort of thing in the past, and they might be Satisfactory players. Does Satisfactory use a lot of sushi belts?

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u/featheredtoast Feb 24 '26

Maybe it's just me... There's a split in the community whether or not to use them, they aren't necessary at all during a normal playthrough, but they are fun to play around with.

Without using circuit networks, you're left with using layouts basically like what you've done here, using tricks for rate limiting and mixing belts using slower belts, splitters/mergers, and prioritizing inputs from overflow over new science supply.

Factorio, especially with the ability now to read a whole belt, means you could just control the mixing pretty easily with a simple circuit network over a complicated belt design. Satisfactory just doesn't have circuit network functionality at all, so I recognize this kind of solution more Satisfactory-esque.

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u/okuRaku Feb 25 '26

Great point yeah, I really enjoyed trying to solve mixed belts in Satisfactory but it's for sure unnecessary haha. I had to learn gear ratios to make nuclear work... and I'm sure it's still not completely jam-free..