S Tips

Hi Paul, we all have to start somewhere, yes same thing happened to
me on my first boat. After study, I learned some solutions. First is
that your spreader tip should be locked in place and not move. There
are a few ways to do this. I use Brian Toss’s reccommendation, and it
works on my BCC. He advised using 2 constrictor knots below the tip
junction and one constrictor knot above on the cap shroud. He taught
me to position the tip correctly, make two “leverage tight” seperate
constrictor knots over 3 wraps of friction tape with tared marline,
just below the tip, on the cap shroud, then one just above the tip,
thus entraping it. Yes you still have to use the monel wire to keep
the cap shroud bedded in the tip groove. Westsail 32’s use a diagonal
strut wire attached to the mast above then down to the spreader, for
the same reason. Some riggers use bulldog “U” bolt clamps, and some
spreader tips have clamps designed in, but cheep and simple
constrictor knots work well on Calliste.
Congratulations on you purchase of Misty, school is in session ,
Douglas

…Brian Toss’s reccommendation, and it
works on my BCC. He advised using 2 constrictor knots below the tip
junction and one constrictor knot above on the cap shroud. He
taught
me to position the tip correctly, make two “leverage tight”
seperate
constrictor knots over 3 wraps of friction tape with tared marline,
just below the tip, on the cap shroud, then one just above the tip,
thus entraping it. Yes you still have to use the monel wire to keep
the cap shroud bedded in the tip groove.

Interesting. Can you share how you determine the correct position
for the lower and upper spreaders? I have tried to eyeball the
appropriate angles, but I’m not sure they’re right. I’m curious what
Brion Toss had to say on this.

Thanks,

Tom Unruh
Galatea, #117

Hi All  --  Spreader angle is supposed to exactly bisect shroud angle.  This makes perfect sense because the spreaders will only be in compression if this is the case.  Spreader angle will be greater for the uppers than the lowers because the shroud leaves the mast at the masthead.  The lower spreaders have a very shallow angle because the shroud is coming off of the upper spreaders and going to the deck.  This can all be measured on the rigging plan and transferred with a bevel angle to the mast.  Your eyeball is also surprisingly accurate- stand on a high dock and try to use parallax against a known horizontal object such as the horizon and you will be able to see a very small angle.  
 
I haven't felt the need to use knots but do seize the shroud in the tips of the spreaders quite snugly.  It's certainly possible to loose a mast due to a fallen spreader, so stay observant. 
 
S/V MINX
Roy
----- Original Message -----
From: taunruh
Sent: Saturday, June 05, 2004 7:23 PM
Subject: [bcc] Re: S Tips


>...Brian Toss's reccommendation, and it
> works on my BCC. He advised using 2 constrictor knots below the tip
> junction and one constrictor knot above on the cap shroud. He
taught
> me to position the tip correctly, make two "leverage tight"
seperate
> constrictor knots over 3 wraps of friction tape with tared marline,
> just below the tip, on the cap shroud, then one just above the tip,
> thus entraping it. Yes you still have to use the monel wire to keep
> the cap shroud bedded in the tip groove.

Interesting.  Can you share how you determine the correct position
for the lower and upper spreaders?  I have tried to eyeball the
appropriate angles, but I'm not sure they're right.  I'm curious what
Brion Toss had to say on this.

Thanks,

Tom Unruh
Galatea, #117





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