I thought they used them on v or flat engines. I remember I had a corsica that had one, threw a rod coasting down a hill. I blamed the baffle.
given the inline is a parasitic loss just to look at, it is probably another backwards to keep the baffle out. Baffling to gain a bit more at the bottom of a cylinder it never touches? keep heat? who knows. there is physics of straight up and down, everything around it must be a yoyo as well.
