User:LordTeague/sandbox

Note: Many of these schematics are designed for a circular blockspace. D# is used to specify the area is circular, and how wide the circle is.

If you want to launch TNT to the north, you'd want to press the button to the north. But without the reverser, the button to the north would launch the propellant to the north. The reverser routes each of the buttons to the opposite input, so that you don't have to worry about running to the opposite side to press that button instead. This circuit is size D21x2, excluding the ceiling and floor.