A pair of 180deg crank twins combine together on a centralized flywheel shaft for a rare configuration engine, the Square Four. From LONGBOY ENGINE.
Yes, atmospheric valve blocks between the two cyl. banks. You can view the build log here in the Photos and Videos forum.Thats cool. And what a strange sound. At first it sounds like a rock crusher, then you get to hear the beat.
I dont quite see how the intake valve works. Is it in a manifold off the side of the head?
See my introduction in the build log here! LONGBOY'S "SQUARE FOUR" MODEL GAS ENGINE.Nice one Longboy- kinda reminds me of the old pommie motorbike, the Ariel Square Four. As I remember it, it came in 2 sizes, 600cc and 1000cc and was a good touring engine, but never a performance machine. Had a really nice exhaust note.
https://en.wikipedia.org/wiki/Ariel_Square_Four
Enter your email address to join: