It sure gets hard to keep PERSPECTIVE, don't it?
The English Listers WERE balanced, as well as the design calls for, (I STILL would like to know HOW), then they were bolted to a solid mount to last into the ages.
Now, SOMEWHERE in the innards or spinning outtards of a Indian engine is a wrong part that makes it shiver in MIGHTY convulsions at certain RPMs. Obviously *something* is not balanced.
What PART or relation to parts is out of balance and how do you find it?
THAT's one question.
I'm not into bolting weights on parts that aren't wrong. But IF they're wrong, I'd like to know it.
Since the inside parts are pretty much 'set' in weight and relationships to each other they *must be* pretty close....twins are another story. As long as the crankshaft is the same design and size the internals *can't* be too far from original.
That leaves the flywheels as the culprit.
NOW--- assuming a minute a flywheel is a pound *wrong* of 'where it should be'. Since there's a cast-in counterweight on the rim, it's not 'balanced', but SOMEWHERE, somebody HAS to know how much that counterweight is supposed to weigh.....I sure can't figure it out from the "Duels by formulae" that fly around my head.
Here's the question I'm asking--- Is that flywheel 'wrong' because the Indians put too much iron somwhere? Or left some OUT? Or missplaced a keyway? Or machined the casting eccentrically? Is there a way to determine which it is?
I just can't get excited about hanging extra weight on something that may not be structurally strong enough to take it.
To the foundation--- These engine can NOT be perfectly balanced, no matter what you do. That's why the crankshaft is so MASSIVE and the horsepower so low.
I'm not ready to say 'this is why it is', but it seems to me Lister designed their half of the engine pretty well. It's up to the customer to supply the support for it. Lister has said what that should be.
Can anybody think of WHY Lister would have specified that particular mount and mounting system if not for stabalizing the engine?
My steelmill millwright buddy says it's a no-brainer. The foundation is the 'other half' of the crankcase.