Step 2: Work out the design, assemble materials
We settled on hanging a drive shaft a few inches below the top of the swing by pillow blocks, and to attach the swings to that by roller clutches, (or roller bearings as some say. Essentially ratchets). as the swingers swung forward they would turn the shaft forward, and when they swang back the roller clutches would freewheel and the momentum of the generator would keep moving forward. if the two swingers were out of sinc. then there would always be someone pushing the generator forward.
The generator was to be connected to the drive shaft by gears and chain.
The picture shows when we thought we would be able to fit 3 swingers.
The roller clutches which fit around the drive shaft were to be pressed into a standard pipe, and the swingers chain secured to the pipe. that way the weight would be distributed over the drive shaft and the swings would be removable.
All in all the finished product came out very similar. which i don't usually expect.