# Standard Rig Stiffness Test: a proposal

**URL:** <https://forum.progressionproject.com/t/standard-rig-stiffness-test-a-proposal/1814>\
**Category:** Uncategorized\
**Created:** [April 9, 2023, 11:15am UTC](https://forum.progressionproject.com/t/standard-rig-stiffness-test-a-proposal/1814 "2023-04-09T11:15:38Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**Author:** ![Matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@Matt](https://forum.progressionproject.com/u/Matt)\
**Post date:** [April 11, 2023, 11:53am UTC](https://forum.progressionproject.com/t/standard-rig-stiffness-test-a-proposal/1814/23 "2023-04-11T11:53:40Z")

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Yes with the big slower Axis wings (1150 and 1300) on the longer alu mast it became very noticeable, less so on HM which I think is an important note: torsion probably more difficult to pin down and measure but huge impact on big span stability, which I think @McD gives some guidance on.

Also seems sensible to do a few weights from 10-50kg to plot any non-linear flex type stuff?

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