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bred2shred
Joined: 02 May 2000
Posts: 989
Location: Jersey Shore
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 Posted: Thu May 10, 2012 9:04 am Post subject: Re: Windsurfing Math |
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| Windnc wrote: | | How do you calculate the force on the harness lines and boom? |
Based on the fact that there are now two pages of posts after four days and no one has acutally posted a formula and/or reasonable set of equations with solution, I'm going to say that calculating the force during a catapult with any expecation of accuracy is more or less impossible. At least within the windsurfing community brain pool.
Testing with sensors would be the only way to get accurate, real world numbers (nothing wrong with that by the way. Emperical testing is done all the time in engineering.). Time to hook up some Mythbusters "Shock Watches" and start catapulting.
http://www.shockwatch.com/impact-tilt/impact-indicator/index.php
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isobars
Joined: 12 Dec 1999
Posts: 20935
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| Posted: Thu May 10, 2012 9:15 am Post subject: |
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| Dennis0778 wrote: | also, it not actually the acceleration that hurts a person, it's the collision.
one can't get hurt in the air, it's only when one lands that one gets hurt
the original post described getting "pulled off" one's board. It all depends on the frame of reference, but relative to the earth, what really happens is that the board stops and the human and rig keep going due to their momentum ... |
Get back to us on that after your first catapult. (And see what a really violent one can do to your back, long before you land, if wearing a minimalist waist harness.)
And it's the acceleration produced by the collision that hurts ... effectively a chicken and egg issue. |
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isobars
Joined: 12 Dec 1999
Posts: 20935
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| Posted: Thu May 10, 2012 9:20 am Post subject: |
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| bred2shred wrote: | | Based on the fact that there are now two pages of posts after four days and no one has acutally posted a formula and/or reasonable set of equations with solution, I'm going to say that calculating the force during a catapult with any expecation of accuracy is more or less impossible. |
We pretty much said that back on Page 1, Day 1. |
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