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Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Mon Mar 11, 2019 3:10 pm
by HYPPS
Guys I think I just broke the game, I'm pulling out 8 full express belts from each wagon. Theoretical maximum is 8.36667. That's 4 belts on each side, crazy. That's 360 items per second getting onto belts. 373.8 Items per second are being offloaded from the wagon into the tanks. The train will be stationary for 10.7 seconds before moving off (4000/373.8). That gives the next train 0.41 seconds to arrive. Highly unrealistic so the belts will not be full as no train in vanilla can accelerate/brake so fast! But if you were in a modded scenario with unlimited stuff in a cargo wagon you can get a lot out!

As you can see if you only wanted to get two belts out the design is quite simple, its just 6 inserters, 3 undergrounds and 6 splitters.
Screenshot (43).png
Screenshot (43).png (6.56 MiB) Viewed 676 times

Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Tue Mar 12, 2019 6:44 pm
by HYPPS
Here are all the different designs I came up with:


Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Wed Mar 13, 2019 11:03 am
by nuhll
Since no one is answereing... nice work... and thanks for sharing... but like you said yourself, not very usefull without (crazy) mods... :)

Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Wed Mar 13, 2019 1:06 pm
by knightelite
For what it's worth, 8 belts is possible to use depending on the stack size of the items (the proportion of the total time the train spends moving in and out of the station is less with larger stack size). Would likely work for trains full of space science at the very least :D.

Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Wed Mar 13, 2019 2:33 pm
by HYPPS
One thing I learned from this is that if you set the stack inserter stack size to 8, two inserters can fill one side of the belt perfectly. If they are both on 12 then then there is a gap of 4 items, as the 2nd inserter drops 8 items onto the belt gap, it remains holding 4 items, then the next 8 gap doesn't get filled because it can only drop 4 off before having to swing back for more. My calculations were for 100 stack size by the way for iron plates, so space science with a 1k stack gives 4.1 seconds time in between. So somebody wanna design a train station that has a train start to accelerate into it as soon as one starts to leave, a wire from the train station to a turned off signal at the waiting bays. It would have to be perfect acceleration not sure what kind of distance but I'm sure the waiting bays will have to be further away.

I guess this design is practical if your factory is intermittent, or say its a chip factory with productivity modules where you're not actually pulling a full blue belt.

Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Wed Mar 13, 2019 4:07 pm
by knightelite
Space science actually stacks to 2K, not 1K, so you likely have twice as much time to cycle your train through. Should be easy to do in 8 seconds without anything too special.

You can also use signals every wagon length so the incoming train follows the outgoing one quite closely; at that point you can get the clear time between trains down to basically the time it takes the outgoing train to clear one block + the time it takes the incoming train to clear one block, or around 2 seconds for 1-1 trains (and likely similar for larger trains with a 1-2 locomotive to wagon ratio). There's some comments about required train speed in this discussion from when I designed something similar using cars.

Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Wed Mar 13, 2019 5:08 pm
by quyxkh
knightelite wrote:
Wed Mar 13, 2019 4:07 pm
Space science actually stacks to 2K, not 1K, so you likely have twice as much time to cycle your train through. Should be easy to do in 8 seconds without anything too special.

You can also use signals every wagon length so the incoming train follows the outgoing one quite closely; at that point you can get the clear time between trains down to basically the time it takes the outgoing train to clear one block + the time it takes the incoming train to clear one block, or around 2 seconds for 1-1 trains (and likely similar for larger trains with a 1-2 locomotive to wagon ratio). There's some comments about required train speed in this discussion from when I designed something similar using cars.
You can do better than that (by the time it takes to clear the first carriage, the first 7 meters of acceleration) with a a circuit condition so the entering train starts accelerating the instant the leading train leaves:

Re: [Experiment] Unloading 4 compressed blue belts per wagon.

Posted: Wed Mar 13, 2019 5:20 pm
by knightelite
Cool, that makes sense. Let's the second train build up a little more speed before it has to brake, making it enter the station faster.