A big set of balls and the Pythagorean Therom

[Tom Dunlap]

How to get an 80' rig through the 65' bridges of the Intracoastal Waterway using two tons of water. The balls get swung out with an initial turn to port or stbd. The tendency then is for the roll to continue by itself, but is controlled by letting the bags out slowly with a line made off to each bag and running through necessary tackle to a cockpit winch.

Pythagorean Therom

Paying attention in math class does pay off!

 

[lumberjackson]

Pretty cool. I'm in math class right now.

 

[beaker]

I had to send that off to my father, seeing he's planning on coming north via the intercoastal system next year...

Gotta admit, impressive to have the guts to do that.

-mike

 

[Crazy_Jimmy]

shoulder lean.

 

[tomthetreeman]

What are the calculations of the load that the mast can sustain??? That's the part that scared me the most... Horizontal pull on the mast tip!!! Ouch!

-Tom

 

[beaker]

In terms of force @ the mast, it can handle a lot.

In terms of tension on the rigging, 2k-3k PSI on the backstay of a sailboat is a normal amount of force, and to have the leeward shrouds be loose when sailing with the wind on the beam is also normal (the boat & hardware stretches & flexes) And in this use, a lot of the force is still in a downwards direction

EDIT: And for the real simple force comparison, its perfectly normal to have enough force from the wind on the sails to lay the boat over so the rail is in the water, much like it is in the video.

 

[cerviarborist]

Did you notice how one of them hangs lower than the other?