# Prepomax angular velocity tool test. Dzhanibekov effect

**URL:** <https://prepomax.discourse.group/t/prepomax-angular-velocity-tool-test-dzhanibekov-effect/2608>\
**Category:** General Questions\
**Created:** [April 7, 2025, 1:30pm UTC](https://prepomax.discourse.group/t/prepomax-angular-velocity-tool-test-dzhanibekov-effect/2608 "2025-04-07T13:30:04Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\
**Post date:** [April 7, 2025, 1:30pm UTC](https://prepomax.discourse.group/t/prepomax-angular-velocity-tool-test-dzhanibekov-effect/2608/1 "2025-04-07T13:30:04Z")

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Hi,

Tool works really nice. I’m using Dzhanibekov effect as reference.

![ezgif-3c6caea2a14b8a](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/5/51a0820b9262c36a7aac16cfb47637213aecc349.gif)

Minor comments:

Initial velocity doesn’t work with rigid Body. I guess that’s a ccx limitation. Not a big issue.  
Save video tool doesn’t remember the last folder I have use.

Regards

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**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\
**Post date:** [April 8, 2025, 7:29am UTC](https://prepomax.discourse.group/t/prepomax-angular-velocity-tool-test-dzhanibekov-effect/2608/2 "2025-04-08T07:29:53Z")

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I really like the model. I tried simulating it in previous versions but failed. Can you share the model?

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**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\
**Post date:** [April 8, 2025, 9:18am UTC](https://prepomax.discourse.group/t/prepomax-angular-velocity-tool-test-dzhanibekov-effect/2608/3 "2025-04-08T09:18:33Z")

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Here’s my version based on [Why Do Tennis Rackets Tumble? The Dzhanibekov Effect Explained… | COMSOL Blog](https://www.comsol.com/blogs/why-do-tennis-rackets-tumble-the-dzhanibekov-effect-explained)

[Dzhanibekov effect.pmx](https://prepomax.discourse.group/uploads/short-url/itQZF9h80esq3i1Ban47P7Ey3DD.pmx) (269.3 KB)

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<div class="post-metadata">

**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\
**Post date:** [April 8, 2025, 12:46pm UTC](https://prepomax.discourse.group/t/prepomax-angular-velocity-tool-test-dzhanibekov-effect/2608/4 "2025-04-08T12:46:06Z")

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I see FEA already send its own version. !!!. 👍