Hi Thom

Actually the force is revealed as compression on the boom in the topping
lift case and bending in the vang lifgt case. I wonder how many booms
Dog has bent lifting loads that way??? In our case, the solid vang only
serves to hold the boom up is the sail is dropped (and no topping lift
used). Just another thought, do you suppose Doug thinks that compressive
and tensile strengths are the same in symmetrical structures???

Cheers

Thom Stewart wrote:

Doug,

I mentioned early in this discussion that with a topping lift hoisting
boom, the boom only positions the location of hoist. There is very, very
little force on the boom. The hoist is on the topping lift.

Mooran re-stated this.

You are the one insisting the force is the same on the end of the boom
supported on the other end by a Vang and a gooseneck. We say BS and sign
off.

Ole Thom