RE: [Cal_Boats] Re: Looking for headstay length on Cal T/2
In the site
http://www.baconsails.com/
Under measuring, I is presented as the mast height. If that is the
case, then the forestay length (FL), according to Mr. Pythagorus, is:
FL = sqrt((I^2)+J^2))
so on a T/2 Tall Stick we have FL = sqrt((37^2)+(12^2))
FL = 38'10" (approx)
Cheers
Charlie
From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On
Behalf Of Chris
Sent: Friday, February 24, 2006 11:36 AM
To: Ca… [at] yahoogroups.com
Subject: [Cal_Boats] Re: Looking for headstay length on Cal T/2
Dave,
Thanks!! Yes exactly what I wanted to know.
Thanks also to the others for posting the I, J, and P dimensions.
Although, after a good bit of web researching, I think I'm more confused
than when I started as to what I, J, and P mean. It doesn't seem that
any of these clearly refer to the length of the headstay, nor can one
calculate that length from using I J or P. Or am I missing something?
from CrusingDirect site: ( http://www.cruisingdirect.com/PEIJ.htm )
"I: A dimension from the headsail halyard hoist to the sidestay
termination (chainplate) or sheer line of the boat. "
So, when you folks quote the I dimension, I'm guessing its using this
definition? Then there are also definitions that seem to describe it as
the height of the genoa halyard (which equals the forestay length)..
...hmmnn, is it just me, or is this confusing and contradictory?
Or do I need to use the old Sin=O/H Cos=A/H Tan=O/A rules to figure this
out?
Chris Floyd
Some sites which added to my confusion on this:
http://www.endeavourowners.com/dscsn/info/rigdata.html
http://dan.pfeiffer.net/boat/ratios.htm
--- In Ca… [at] yahoogroups.com, "Dave Leasia" <telephone_dr@...>
wrote:
> The original manual for my 1972 27' pop-top lists the headstay as:
> 5/32" 1 x 9 x 35' 9 3/4", marine eye and 5/16" RH stud
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