### Belt speeds

Posted:

**Sat Aug 31, 2019 6:03 pm**This is something that's been niggling at me ever since 0.17 changed the belt speeds from the old (ugly) 13.33x item/s multiples into 15x multiples. The new change to whole unit flow is nice, but it's pointed up the fact that the unit speeds selected are ones that don't subdivide readily (excepting fast belts).

The reason for this that 15's only factors are 3 and 5, and 45's only factors are multiples of those (3, 5, 9, 15). Fast belts are in a much better place because, as a multiple of 6, they have a huge number of factors: 2, 3, 5, 6, 10, and 15 are all there.

This means that red belt, much more so than either yellow or blue belts, lends itself to simple assembler and recipe math. Since belts are the earliest and most basic form of transport the game provides I think that easy factorization is a very useful thing to have, particularly given the simple ratios in many of the other early-game recipes.

So I propose a tweak:

Yellow belts to go to 12 items/sec; red to 24 items/sec, and blue to *48* items/sec.

This I think accomplishes a few things:

First, it makes belts throughput way easier to balance out without needing to resort to a spreadsheet even early. Also means foundry crafting times can stop having that stupid .2 in them.

Second, it makes each tier of belt twice as fast as the previous, maintaining a consistent ratio and allowing for neater merges and splits. When the .17 changes were first made some people requested this but were told going to 60 items/sec caused graphics issues; I hope that is avoidable here since the blue belt speed increase is minor.

Third, how many tiles a belt moves in a second becomes instantly obvious: 1.5 for yellow, 3 for red, 6 for blue.

The reason for this that 15's only factors are 3 and 5, and 45's only factors are multiples of those (3, 5, 9, 15). Fast belts are in a much better place because, as a multiple of 6, they have a huge number of factors: 2, 3, 5, 6, 10, and 15 are all there.

This means that red belt, much more so than either yellow or blue belts, lends itself to simple assembler and recipe math. Since belts are the earliest and most basic form of transport the game provides I think that easy factorization is a very useful thing to have, particularly given the simple ratios in many of the other early-game recipes.

So I propose a tweak:

Yellow belts to go to 12 items/sec; red to 24 items/sec, and blue to *48* items/sec.

This I think accomplishes a few things:

First, it makes belts throughput way easier to balance out without needing to resort to a spreadsheet even early. Also means foundry crafting times can stop having that stupid .2 in them.

Second, it makes each tier of belt twice as fast as the previous, maintaining a consistent ratio and allowing for neater merges and splits. When the .17 changes were first made some people requested this but were told going to 60 items/sec caused graphics issues; I hope that is avoidable here since the blue belt speed increase is minor.

Third, how many tiles a belt moves in a second becomes instantly obvious: 1.5 for yellow, 3 for red, 6 for blue.