The bad news, it doesn’t eliminate wobbles.
The good news, it makes shitty roads almost bearable.
Either way, here is my experience with first (and the only) of a kind mass damper on an esk8 (I think it's the only one).
After this one showed promise, I made one that's remotely resembles a product, maybe something you might consider putting on a board, this is the one:
This one had nicer aluminum block and better secured rubber bands, in a sleek 3d printed case.
Most importantly it gave me more room for the front leg (a rare commodity on this Spud deck).
In both times, the pyramid mount is a lifesaver. Damn easy to mount and to use.
So, what does it do?
Each time you struck something on the road, the board is excited and begins to sway/wobble.
Of course I'm interested in the lateral movement.
The damper gives something smaller and with "more attractive" natural frequency (closer to the excitation) – so it's wobbling instead.
Subjective, personal feeling - it does reduce the "time to settle". Meaning the vibrations will die quicker with the damper attached.
Compare the left (without) with the right figure (with):
The above are just qualitative figures, unfortunately I didn't have a logger to do the actual measurements.
Where to next?
At some point I hit one too many bumps and the thing broke.
I suspect the print was not the best. But more importantly, the design wasn't strong enough in the forward bending direction, which is totally my fault 🙂
There's a potential here. The attraction might be in fine tuning a carvy board which is also properly stable.
It was a fun project and somewhat innovative for the community. I hope you liked these series.
I would like to hear from you: what are your thoughts about this and would you like to take it further?
Have wonderful holidays and a happy new year!
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