[Rhodes22-list] Bosun's Chair - careening

[Robert Skinner]

Combining thoughts from several posts and some history 
of careening boats:

1.  Get the boat between a dock and a tree, piling, etc. 
and secure the main hatch - watertight.  Close all ports.

2.  Secure the boat to the tree, etc. with two lines of 
equal length, one to the bow eye and the other to a 
stern eye.

3.  Using the topping lift, pull the mast over toward 
the dock, and secure it to the dock so that the top of 
the mast is 6-8 feet above the surface of the dock.  
Stop at this point to avoid shipping water into the 
cockpit.

4.  Use a ladder on the dock to access the top of the 
mast.

Might be quick and easy.  Might want to secure objects 
in the cabin before this exercise.  Certainly reduces 
risk, and it would certainly be a conversation piece.

Stress on topping lift:  700 lbs of ballast at 2' = 
1400 ft lbs of torque affecting initial stability.  
Worst case is 3000 lbs acting at 5' when the boat is on
beam's end = 15,000 ft lbs of torque.  15,000 ft lbs
/ 30' of mast = < 500 lbs.  Looks like 3 grown men 
could pull the boat over.  Also seems to be within the 
working limits of the average topping lift.

YMMV.  I have not tried this on a Rhodes 22.

/Robert
-------------------------------------------------------
David Bradley wrote:
> 
> Thanks, Robert.  I think I've moved beyond trying this without a halyard,
> but the Prussic knot is a keeper.
> 
> Dave
> 
> On 8/10/07, Robert Skinner <robert at squirrelhaven.com> wrote:
> >
> > Look up "Prussic" knots.
> >
> > http://images.ebsco.com/pob/summit/catalog/instr_prussic.pdf
> >
> > They are used by rock climbers, might work on a mast.
> >
> > /Robert
> > --------------------------------------------------------
> > David Bradley wrote:
> > >
> > > Thanks, Wally.  My back-up might need to be a loop around the mast -- I
> > seem
> > > to recall seeing a way of tieing a "braking" rig that would prevent a
> > > free-fall slide down the mast.  More research in order, I'd say.
> > >
> > > Dave B
> > >
> > > On 8/9/07, TN Rhodey <tnrhodey at gmail.com> wrote:
> > > >
> > > > Dave, I have used a bosun chair but I have jib and spinnaker halyards.
> > You
> > > > could use topping lift but I would want a back up. Good luck.
> > > >
> > > > Wally
> > > >
> > > >
> > > > On 8/9/07, David Bradley <dwbrad at gmail.com> wrote:
> > > > >
> > > > > Has anyone tried using a bosun's chair on our boat?  With IMF the
> > > > absence
> > > > > of
> > > > > halyards presents an obvious challenge.  The topping lift line seems
> > a
> > > > bit
> > > > > light and I'm not sure the sheave would be rated for that kind of
> > > > weight.
> > > > > Any experiences?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Dave B
> > > > > __________________________________________________
> > > > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > > >
> > > > __________________________________________________
> > > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > >
> > >
> > > --
> > > David Bradley
> > > +1.206.225.7793
> > > dwbrad at gmail.com
> > > __________________________________________________
> > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> > --
> > Robert Skinner  "Squirrel Haven"
> > Gorham, Maine         04038-1331
> > s/v "Little Dipper" & "Edith P."
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> 
> --
> David Bradley
> +1.206.225.7793
> dwbrad at gmail.com
> __________________________________________________
> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list

-- 
Robert Skinner  "Squirrel Haven" 
Gorham, Maine         04038-1331
s/v "Little Dipper" & "Edith P."