# Engineering and physics of yo-yo design

**URL:** <https://forums.yoyoexpert.com/t/engineering-and-physics-of-yo-yo-design/338297>\
**Category:** General Yo-Yo\
**Created:** [May 9, 2021, 5:54am UTC](https://forums.yoyoexpert.com/t/engineering-and-physics-of-yo-yo-design/338297 "2021-05-09T05:54:29Z")\
**Posts on this page:** 1\
**Showing post:** 17

<div class="post-metadata">

**Author:** ![Exmime](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/exmime/32/40143_2.png) [@Exmime](https://forums.yoyoexpert.com/u/Exmime)\
**Post date:** [May 10, 2021, 1:20pm UTC](https://forums.yoyoexpert.com/t/engineering-and-physics-of-yo-yo-design/338297/17 "2021-05-10T13:20:44Z")

</div>

You can’t talk about Yo-Yo design without bring up BiST

> [@B!ST Yoyo Gallery](https://forums.yoyoexpert.com/t/b-st-yoyo-gallery/297660):
>
> Well, some of you are mailing me, asking for yoyos. Please stop. As I wrote to those who asked for it, I run out all my stock yoyos years ago, and mods are “one of a kind”. I don’t have anything to sell Sorry about that.

 ![image](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/1/e/3/1e3bde05d656bae9132a7cf73a84ecec279d8143.jpeg)

 ![image](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/c/3/8/c38601592e3d59db009f60c0035de0ccd0f18254.jpeg)

 ![image](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/7/f/1/7f14fc25ec54911e2cec860f49625fb67cc790c4.jpeg)

 ![image](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/4/0/c/40ca8d9165ec355d34ad39075e8389f318885e38.jpeg)

---

_[View the full topic](https://forums.yoyoexpert.com/t/engineering-and-physics-of-yo-yo-design/338297)._