Re: [Paddlewise] throw bag construction

From: Shawn W. Baker <baker_at_montana.com>
Date: Tue, 28 Mar 2000 14:44:35 -0700
I dunno?!  I'll dig back into my old posts to see the forces involved
were...I can't remember who figured it out before...

Your math is figuring a static load--a 300 lb. load "hanging" on one end
of the rope.  I haven't had any rough water tow practice, but on flat
water, the load felt like less than 5 lbs.  Even when coming up to
speed, I don't think it felt like more than 10 lbs.  I was towing my
brother, and I kept turning around and asking him if he was paddling!  I
think I need to try it in some rough water to get a more accurate view. 
I know forces could greatly exceed that on either end of a surging
wave.  I would think the maximum dynamic load could be a few hundred
pounds, but not the average working load. 

Who was it that did the bungie/towrope calculations?

Shawn

Philip Torrens wrote:
> I'm not an engineer (nor do I play one on TV), but do you think that's
> strong enough? Given that a paddler alone may weigh 150lbs or more, plus the
> weight of the boat and gear, could bring you to the working load of 300lbs.
> before you even deal with a dynamic load (boats on either side of a long
> swell, the jerk on the line as the towing boat comes up to speed and begins
> to haul the towee) etc. etc.
> 
> Philip Torrens
> N49°16' W123°06'

-- 
Shawn W. Baker          0                                    46°53'N
© 2000            ____©/______                              114°06'W
~^~^~^~^~^~^~^~^~^\  ,/      /~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^
baker_at_montana.com    0        http://www.missoulaconcrete.com/shawn/
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Received on Tue Mar 28 2000 - 13:46:27 PST

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