Talk:Zero-velocity surface

that article fails to explain what the Zero-velocity surface is. What is its definition? the article never states. Dauto (talk) 15:35, 8 July 2012 (UTC)

Incorrect figure?
I think there's something wrong with the figure (right) which appears in the article. When the trajectory touches the zero-velocity surface, it should be perpendicular to it. It should resemble a cycloid with the cusp being on the zero-velocity surface. I wrote to User:Anders Sandberg about this. He says it was calculated using Matlab, but he couldn't find his source code for the simulation. I think he must have made some mistake. Perhaps the coloring is wrong and the zero-velocity surface is not at the edge of the dark blue. If there are no comments, I'm gonna edit the caption to say that it's incorrect. Eric Kvaalen (talk) 09:01, 12 December 2021 (UTC)


 * Having received no feedback or replies to my further e-mail, I have modified the caption. Eric Kvaalen (talk) 10:54, 27 November 2022 (UTC)