Re: [Paddlewise] Impact loading of tow lines.

Dave Kruger wrote:
> 
> My small addendum is that because of the assumption that the towed kayak is
> stopped dead in its tracks, the figures you got are somewhat high relative to
> the peak forces generated in a "realistic" case.  The upshot is that I think
> your analysis shows the maximum force the tower will actually experience is a
> lot less than the 58.8 lbs quoted above.
> 
I thought of a worst, worst case - the kayak or tow line being hit
by another boat and wrenched backwards.  (not as likely)

> And, of course, this means the 1/4-inch bungie need not be three feet long,
> though as a safety measure, perhaps this would be a good place to start.
> 
> Re:  doubling or tripling the 1/4 inch bungie:  perhaps a single 1/4 inch
> bungie is safer, in that the peak force will be reached less rapidly (and with
> more elongation of the bungie), allowing the paddlers to adjust to the sudden
> jerks.  What do you think?
>

Hold that thought!    I made an error in calculating the k factor and
the results aren't quite right (nor as simple) (blush).   I think that 
the net result might be better, but I haven't had time to redo the stuff
(spent the day raking leaves, cleaning the rain gutter etc - 13 bags
of leaves and the trees are only 1/4 shed their leaves!! 15 trees on
our lot)

I also intended to follow up with a comment on the meaning of the 
results.  I'll include this with the corrections, hopefully, tomorrow.

Mike

Mmmm, Amie just handed me a slice pumpkin chiffon pie - I must be
in her good books - the leaves, it's the leaves!
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