[Rhodes22-list] Bosun's Chair - careening

[John Lock]

At 10:49 PM 8/10/2007 -0400, Robert Skinner wrote:
>Combining thoughts from several posts and some history
>of careening boats:

THAT would be a great method if I could work out the mechanics in my 
location.  I'll be investigating it.

>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.

Based on this math, a 160lb person on a bosun's chair will not have 
to worry about overbalancing the boat and pulling it over while at 
the masthead.  Correct?

Cheers!

John Lock
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s/v Pandion - '79 Rhodes 22
Lake Sinclair, GA
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