1. Thank you to all for input.
2. I have two machine shops remanufacturing parts
to attach mast to rotating ball and ball to mast step. I feel this is in part needed since I have redesigned the rigging
and it is fairly low tension. Removing rigging
tension reduced compression
force on the mast foot.
(My extreme beam is what led to the switch to lower tension rigging. I am employing a spring system that automatically takes up slack on lee.)
3. The machine shop also is making two new chain plates which are being attached to central hull
. I have elected to position in line with the mast. The reason is primarily due to the fact it is strongest point being closest to main cross beam box.
4. The chainplates will serve two pairs of lines. One pair is for mast rotation. One pair is for light downwind sailing.
The biggest risk I foresee comes during light downwind sailing. During this type of sailing the boom will be farthest from the centerline and potentially experience the greatest amount of speed when coming across during an uncontrolled event.
Two lines will be similar setup as shown in first drawing with controls led back to cockpit
winches for quick release without going outside.
5. When on the wind
, or during heavy off wind
sailing, the boom position will be mostly about +- 25 degrees from the center line. This narrow range can be controlled from the end of the boom where I can employ two major 3/4" padeyes. This setup will be similar to the one shown in the photo
posted by Thinwater.
6. Regarding snapping the boom. Yes a concern. Anything can break. However, likely boom failures have primarily been for hollow aluminum
masts carrying a lot of sail. I am specifically down sizing sails
here and this boom is nearly solid Philippine mahogany made with West System epoxy
and wrapped in fiberglass
. The spar was originally intended as the mast on a different large trimaran
Note: This will be my initial configuration and I will make changes after testing and seeing if crew can be trained. That includes me.