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Speargun Calculator - Draft

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.


Active Member
Feb 14, 2020
Hi guys,

Currently doing some postgrad testing and research on speargun dynamics. My model is is still very much in draft form but has been migrated from Matlab to Excel so that a greater number of people might be able to use it. The Excel file and .PDF instructions are attached as a .zip file if you want to play around with it.

User Interface V4.png

Results V4.png

Current Limitations:
- Only has 16mm Epsealon White Blizzard rubber at the moment - 30 more rubber options currently being tested.
- Incorporates rubber dissipation and mechanical efficiency, but not hydrodynamic losses (pool testing required) - so predicted velocities will be higher than reality for now.

Future Features:
- Hydrodynamic friction
- Different track types
- Likelihood of shaft whip/buckling
- Likelihood of shaft bending
- Shaft energy/velocity @ 3, 5 & 7m
- Shaft penetration @ 3, 5 & 7m

I'm keen to hear about the usefullness of this tool, if anyone has any suggestions for features they want or how to improve the user interface?

When finished, it will be free-access posted online.




  • Speargun Calculator.zip
    698.3 KB · Views: 284
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