Re: [Paddlewise] speed and resistance

Norm wrote;



(SNIP)
>Given the significantly increased resistance going from 3.0 to 3.5
>knots, and that this is in the common cruising speed range, I wonder why
>Sea Kayaker doesn't give resistance figures for 3.5 knots in their kayak
>reviews.  Are kayak's resistance just too similar at this speed to make
>this info worthwhile?

I can't say why Sea Kayaker doesn't publish data at the lower speed range.
You will have to ask them about that. Actually the differences only seem
small. Relative to the power output of paddlers they are rather large.
>
>I've also noticed that when short sprint speeds are given (determined
>with a knotometer),they often peak out at about 6.25 knots, even though
>the resistance fiqures at the 5 & 6 knot range may be quite different.
>Any thoughts?

There is so much psychology involved in this that one should not place a
lot of value to paddler testing where resistance is concerned. The paddler
tests and evaluations of the boats are as much a measure of the paddlers as
they are the boats. Maybe more so.

Cheers,
John Winters
Redwing Designs
Specialists in Human Powered Watercraft
http://home.ican.net/~735769/





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