"Michael Daly" wrote in message
...

On 15-Jun-2005, "rick" wrote:

He's asking about kayaks. As I said, there is no
correlation
between overall length and waterline length in kayaks.
===============
So, you're saying a 12' kayak has a waterline length the same
as
a 16' kayak?

??? You can't read very well, can you?
===============
Very well. You seem to snip what you can't answer.



I never said it had no effect on speed. I said the effect
cannot be determined by knowing overall length. If you have
waterline
length and you are comparing _very_similar_ hulls, you could
make some estimation of expected speeds.
==============
I saw a statement that said length has NO bearing on speed. I
still see that as incorrect.

I can't comment on what you think you see. I didn't write any
such thing.
=================
Only with wiggling about the definition of is, eh? Again, how
does a longer kayak "overall" not have a longer waterline for
the same type hull?



Take a look at this graph:
http://www.greatlakeskayaker.ca/LengthVsResistance.htm
==================
Your own web site?



It shows the resistance a kayak generates at a speed of 4.5
knots
versus the overall length for a range of lengths from 5.14m to
5.24m.
This data is taken from Sea Kayaker magazine reviews. As you
can
see, the data is all over the place. The variation in length
is
less than 2% but the variation in resistance is over 13%. The
line
on the graph is a trendline (linear regression) and is showing
that there is, according to this data, an _increase_ in
resistance
with length. You folks are claiming the opposite.
=================
And you have yet to provide those many other factors. No one
claimed that nothing but length affected speed. But for a given
hull design, it still looks to me that that will be the major
factor according to the sites I posted.


While you may wave you hands in the air and make claims based
on
misconceptions, I am making statements based on what is found
in real kayaks being sold to real people in the real world.
===============
No, I'm posting web sites that state the opposite of you, not MY
opinion. Which of course you have snipped. Guess you didn't
read them. I was seriously asking for data. You have yet to
provide that, or answer the questions I asked.



Mike