This is a test and demo of the one-sided roller chain. Consists of two sprockets and a base for them to spin on. It requires 23 links of the "Simple one-sided roller chain" to form the chain around the sprockets.
23 Links of this chain:
It seems to work pretty well. It's not going to replace real drive belts or bicycle chains for serious stuff, but can provide a simple printable light duty drive.
Built the sprockets on "Good" and the base on "Normal" (fast). Shouldn't need any supports or cleanup.