Hi,
A bit of a sideways step but I sold some knackered big bore barrels to a chap in Sweden. His idea was to cut off the top 12mm to 15mm and attach it to another set of barrels and line the resulting cylinders. Then use longer rods to alter the rod/crank ratio. I think the idea is to alter the angle between the rod and the big end to crank centre line so that the rod stays as close to vertical as possible. Thus the optimal efficiency of 90º for mechanical advantage is kept to as close as possible during the power and compression strokes.
Any experts out there so clarify this?
Dave.