Mainsheet twisting

[Rocknoids]

I have a 1985 Cat 30 where the main sheets attaches at the center of the boom, then to the cabin top on a traveler.
My problem is the sheets always twist, causing the blocks to turn after a couple of tack or letting the boom out then bringing it back in.
I have taken the sheet out and allow the hockels to remove, but, they come right back.
I need to know if there is a line that does not hockel. I don't know what is there right now. 3/8th or 7/16th some kind of poly.. line.

 

[Stu Jackson]

It's not the line, it's the blocks.

You need blocks that do not twist. My PO used tiny line and wrapped it around the point where the blocks twist to stop it.

I bought new mainsheet blocks from Garhauer that do not twist.

Problem solved.

 

[Rocknoids]

Thanks for the reply. I will look into changing the blocks.