Stiffness and Damping vs Hanging Weight for Radial Motions

In the previous post I looked at the stiffness and damping of a tripod versus that amount of weight suspended beneath it.  I was only looking at axial (side to side) rotations and found that hanging weight made no difference.  I only looked at this direction of motion since it is where tripods are weakest, and thus where any difference will be noticed.  There could be situations in which only vertical motions would induced on the tripod.  Thus, I realized it was important to look at radial (up and down) motions as well.  Here are the results:

 

Again, we might see a slight effect on the damping, but other than that, nothing.  If there is an effect, it is very slight and cannot be measured in these tests.

Hanging weight can have an effect on the stability of the system, lowering its center of gravity to prevent it from being knocked over.  But simply in terms of the tripod’s resistance to vibrations, it will not make any significant difference.

 

2 thoughts on “Stiffness and Damping vs Hanging Weight for Radial Motions

  1. This is an obvious marketing effort
    to insure that by hanging a swinging
    weight (albeit in the wind) would
    have any positive effect to increase
    stability of three legs.

    1. I don’t work for any photographic related company, so have no interest in spreading false information. As stated in the article, this is not the optimal way to hang weight, just the easiest to test in a repeatable fashion. The weight did not swing at all during the test, as it was in a controlled environment. Hanging weight via a bungee cord to a weight on the ground produces the same result.

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