The Simplicity (!) Motor Works One-Cylinder Rotary Engine. Sure, it sounds insane, but it makes perfect sense once you've seen it.
Still, it's the darnedest thing I've seen in awhile. Two connecting rods and a split crankshaft? Yowza! --And just to prove irony ain't rusted away yet, the makers note, "It is ideal for drones or UAVs!" Great; when they come for me, I'll be too fascinated by the kewl machinery to do anything about it....
T. R. MCELROY'S STREAMLINED TELEGRAPH KEYS
6 months ago