rattle 'n hum wrote:
If the sum of all the forces is zero, and the force in that section of the Aussie halyard is 1/3 of the older system in that section, then there has to be more force in the other components attached to the mast (pigtail and shrouds).
That by itself is not valid logic. Less force somewhere doesn't have to mean more force somewhere else. It can mean less force somewhere else.
And I submit to RH's point that it's not compression that causes the bending. Since the halyard is located outside the mast column, it's actually a moment with a very short arm, no?
I agree, too. The moment is a small component of the overall force (the rest is compression) but the bending is all we care about. 1/3 the halyard tension acting on the mast between the tang and the cleat, 1/3 the compression, 1/3 the bending moment. That's really the whole thing in a nutshell.
If anyone wants to start this over with a clean mind, think about it like this: Use the Aussie halyard. Then tie two lines to the tang, install two more cleats on the side of the mast, and then tension and cleat the two lines the way you did the Aussie halyard. Now you have three tight lines trying to bend the mast instead of one, no extra loads anywhere else. That is exactly the difference.
'00 H16 #104691 - '78 H16 #32692 ex-rental - Old Holsclaw trailerMy Hobie 16 pages