Really?Ihateyoubutler wrote:In my humble opinion, balancing anything that rotates is only ever going to cause less axial or radial movement at certain rotational speeds (vibration). To "balance" a flywheel, and to be effective across the total rev range of even a standard Lambretta engine, never mind the increased rev range of a tuned engine, might be difficult to achieve. What I'm suggesting is that it will only be "balanced", ie causing less vibration, within a specific rev range anyway. If a flywheel is machined to run smooth at, say 5000 rpm, it doesn't mean it will do at 3000 rpm. Maybe a flywheel should be machined so the engine run as smoothly as possible at the constant speed the engine is generally run at, but in this country and on our roads would this be possible?
Surely if it's 'balanced' the actual speed of rotation doesn't matter?
I've seen wheel balancing done with a machine at high speeds and by hand at low speeds. The end result either way is that the no matter where you set the wheel it stays put, there's no 'roll' either way, no 'heavy' side. Usually with wheels this involves adding weights to the 'light' side so that a balance is achieved. With drilling a flywheel you'd expect to be removing metal from the 'heavy' side to even it up.
