The Aeronautical Engineering milestone introduces the Battery production line. Batteries are primarily used by drones as their fuel source and hence why you need to create a battery factory.
How many items per minute of "something" should I make? This is a question I get asked frequently and I respond by explaining my Pioneer First Method.
I use a spreadsheet for planning my production lines in Satisfactory. I do this so I don't spend time during my streams doing maths and running around checking what machines are making what, I personally don't think it makes great viewing. However due to multiple viewer requests I did an impromptu crash course on how I use the spreadsheet and how it helps make decisions.
If you use trains to transport resources then you are going to want to make sure the train can supply enough resources to last the round trip. This video explains how to calculate this along with a working example. This video also explains the theory behind using buffers for the freight platforms.
The amount of Fuel created from Crude Oil and it's by-products can vary greatly depending on what recipe combinations you use. This video is about telling a story of how many machines need to be built and how much power will be created.
If you use trains to transport fluid then you are going to want to make sure the train can supply enough fluid to last the round trip. This video explains how to calculate this along with a working example.