Ultimate Sushi Megabase (500spm)
I made a megabase from a single sushi belt that produces more than 500 science per minute*.
Here are a few key features:
- All items go on a single, contiguous belt, making an almost 7-hour round trip around the base. No splitters or balancers.
- Most assemblers take inputs from 12 different belt segments, maximizing the chances of finding their needed ingredients, and output to four different belt segments, keeping items more evenly distributed.
- All fluids are barreled.
- Item counts are monitored by sampling belt contents every eight tiles, and averaging the count over the past five seconds using a shift register. No need to empty the belt if you make a mistake.
- Item levels are determined by calculating how many of each item/minute each assembler needs to maintain production, and dividing by the number of input inserters. For example, an electronic circuit assembler (with productivity modules and four speed beacons) needs 1080 copper cables/min. Dividing by 12 input inserters means you only need to maintain 90 copper cables/min on the belt. Considering that blue belts can carry 2700 items/minute, this actually isn’t very much. In theory, if all items were distributed perfectly evenly, you could run this whole base using just 12% of the belt. In actuality, they’re about 70% full to give more of a buffer while still allowing space for items to be added to the belt.
- Chests next to the rocket silo act as an input buffer and ensure that a satellite is always ready to be put in cargo.
Obviously this was made in the editor with spawned-in resource patches and infinite electricity, but otherwise everything is vanilla.
Big shout-outs to Dosh, DocJade, and MysticFish whose sushi videos were a big source of ideas, and who all finished the actual game using sushi belts!
Save file: https://drive.google.com/file/d/1WumtdQBmq\_BVo5pkoxvrJc2\_W1wgAahW/view?usp=sharing
(*it’s actually more like five 100spm sushi bases strung together and only gets around 30 UPS when all five are running)