ORIGINAL: acdii
That last one was what I had in mind. Would love to see it in action. Some day I hope to get a mill and lathe so I can start tinkering around with these. The real trick is timing them so they fire off in a way that is smooth.
Odd number of cylinders W/odd # cylinders firing on 1 revolution, even # cylinders on the 2nd revolution.
1-3-2-1, 1-3-5-2-4-1, 1-3-5-7-2-4-6-1, 1-3-5-7-9-2-4-6-8-1, etc.
Unless it's a 2-stroke.