CYGN-B

[lasermaster1977]

Who knew the dogloids can be produced by simple pendulums. Not I. I found this video:
https://www.youtube.com/shorts/Obo9Vb0dahs

Very cool pendulum video, Greg.

[Greg]

...a row of pendulums, swinging progressively out of phase from one end to the other.

Could it be the pendulums are of differing lengths so each is swinging at a slightly lagging or leading period to the next?

[lasermaster1977]

Could it be the pendulums are of differing lengths so each is swinging at a slightly lagging or leading period to the next?

The Hermit; Pendulums of the same length swing at the same frequency.

Perspective, literally, visual perspective is the key here. Greg is correct. Each pendulum is on a graduating smaller length, front to back. Look closely at the start of the video, the long wooden board strip is not level...because of the different pendulum lengths, longer in front, shorter in the back, it has to be at a slant to touch and hold each ball back on their left side.

The balls in the background swing at a faster rate than the ones in front, but as the swing period of each ball decays the phenomena of 3D cycloids are revealed.

[laserist]

https://youtu.be/_8JMVl-_KKs?feature=shared

[lasermaster1977]

https://youtu.be/_8JMVl-_KKs?feature=shared

You big show off!