ok. BACK to the original design of the damper then.
I seem to recall we were talking about this:
Advancing blade loads the hub bar more, then as it becomes the retreating blade, it unloads, and SPRINGS back to a less loaded coefficient working against the hub bar and the opposite blade. As this occurs we experience a twice per rev stick shake, as each of the 2 blades goes through this cycle per rotation.
The only answer to reducing this springy loading and unloading against the hub bar is to beef it up outside the towers. Like the difference between using a 2x4 floor joist, jumping up and down on it, and using a 2x8 floor joist and jumping up and down on it. Both will take the stress, but the 2x4 is too damn springy, and is a terribly insufficient piece of lumber to use as a floor joist.
That being said, I can't see why you would need to bend the dampening bars at all. Kinda defeats the purpose, as they will not be as efficient in their application.
I can't see where solid, heavier round stock would be any better than a hollow tube. Ever look at a steel building with trusses made of top and bottom girders tied together by triangulated cross ties? Same deal. The middle does absolutely nothing. It is the distance between top and bottom that determines stiffness.
Porsche used round torsion bar suspension in the 911 and 914 cars. We gun-drilled em to lighten em up when we built our track mods. Later, you could buy em that way from the parts shops. Of course, that is torsional, around the radius, and this app is longitude, along the length, but it still works in a similar way.
BUT - the machined coning angle of the hub bar makes it very difficult to built a straight stiffener, so...bend it to match the angle of the hub bar, right?
I think I understand how this works. If I am wrong, please set me straight. I want to try and make one of these for my AC. IT is a fantastic mod in my worthless opinion. I have heard about these from a few people, but couldn't picture it in my mind. This is a big help.
I can't see much need for it on the little bitty 1-foot hub bars, on a light single place, but, MAN, on a huge tandem with a 4-foot hub bar? Abso-frikkin-lutely man!.