RE: [Paddlewise] Hull speed and Olympic kayaks

>
Robert Lawson asks;
>
> Tell me more about what you could tell from observing their wake. How
> does it look when the bow wake is over run?
>

Reply:

Actually quite a lot of information could be gained from the wake.  If you 
could accurately measure the angle of the wake from a photo you could 
determine the boat's speed.  The size of the wake combined with the LWL 
would also tell you something about the boat's displacement (though I am 
afraid I am not smart enough to figure that one out, though it is possible 
I'm sure).

When a boat overrides it's bow wake the wake has a series of overlapping 
diamond shaped patterns as viewed from above.  This is a pretty well 
understood phenomenon with any fluid including air at supersonic speeds.  I 
learned this from doing aerodynamics research for a defense contractor in 
the early eighties, playing around with toys in the water you can see this 
at much lower speeds than is required for air.

and Patrick Maun ask:

> My question is: when did you manage to see kayaking?

Reply:

I mentioned I happen to "catch" it, it was luck.  The gym where I exercise 
at here in western Washington state has some kind of special sport cable 
service just for gyms and health clubs where they broadcast all kinds of 
sports all day long for the TVs that many gyms have hanging around now a 
days (I can do with out them personally).

It was I think last Wednesday morning about 9:30 am west coast time, I saw 
the qualifying trials for both canoe and kayaks, both men's and women's, 
both one and two person canoes and kayaks.  I do not know the final out 
come since I never saw the finals though the announcer said it was to 
happen the next day depending on the weather (the trials were delayed 
because of weather).  I think the station may have had something to do with 
CNN sports but I'm not sure if that is the case with the Olympic coverage. 
 I just got lucky it was on when I was there on a stationary bike, 
otherwise I do my best to ignore the TVs, I'd rather be reading, or 
re-reading an SK magazine.

Peter

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