Conjoined piston engine, with herringbone gears!
Herringbone gears added.
4 years ago 00:01:25 3
4 years ago 00:02:02 4
4 years ago 00:02:25 1
4 years ago 00:01:17 1
4 years ago 00:02:09 1
4 years ago 00:01:05 3
4 years ago 00:01:44 3
