How to on the Olson 30
Single spreader Capshrouds to top of the mast
contributed by Alex Krawarik
One performance and safety conversion that many boats are making now is moving the capshrouds to the top of the mast from their original location 22 inches below the top of the mast. Many boats in the Pacific Northwest fleet have made this conversion:
- Chuck Queen pioneered this conversion on his boat Barnstormer.
- War Canoe did the conversion after they crunched their rig on the hoist and went from a double spreader rig back to a single spreader rig.
- Enigma and Orcrist have also done the conversion
Chuck Queen says, "in a breeze it will significantly improve your performance. It will improve your ability to get forestay tension and it is just a safer setup. Remember, improved forestay tension will make the leading edge of your genoa flatter, which means that the boat will be easier keep upright, and thus you will be able to point better."
Cost is based on the price of your new spreaders and rod. If you have this done professionally by a rigger, it will cost more. Expect to pay several hundred on the spreaders, and around 1000 dollars on the rigging. In the Seattle area, Spar Tech Co. (425) 867-1343 can supply the rod cut to length.
The conversion is not difficult, but it is a logistical challenge and somewhat time consuming. It can be done in a single day when all the parts are assembled and ready. Whats involved:
- Step 1: Order the new capshrouds for your boat in the appropriate length. If you are not an engineer by trade, we can help you figure out how much extra shroud length you'll need. If you measure your current spreader length (mast edge to the centerline of the shroud), current shroud length (pin-to-pin), how much additional height you can get with the new shrouds, we can calculate the new length you need. This is Navtec dash 4 rod rigging. It is expensive, its important to get things right the first time.
Example lengths for an OEM Sparcraft mast section:
- Navtec -04 capshrouds Center Navtang to Turnbuckle Pin 35' 7 1/4 "
- Navtec -04 lowers Center Navtang to Turnbuckle Pin 17' 2 1/4"
- Navtec -04 headstay Center Marine eye to Turnbuckle Pin 37' 10 1/8"
- Step 2: Order 37 1/2 inch spreaders to fit your current spreader mount. Buzz Ballanger can take existing ones and lengthen them by request.
- Step 3: Pull the mast and strip the old rigging. Use any old hardware you want, but this is a fine time to replace turnbuckles etc. if you are still sailing on 20-year old gear. When we did this conversion on Orcrist, we replaced some hardware, but kept other hardware. We also took the time to replace the forestay at the same time.
Optional: You can still use your old capshrouds for another boat, if they have servicable life in them, or cut them into a newer set of lowers.
- Step 4: Drill holes for the new capshrouds at the top of the mast, according to your measurements. You can elect to cover the old holes with a small plate, or not.
Optional: This is a good time to do maintenance on your halyard sheaves.
- Step 5: Assemble the hardware for the new shrouds.
- Step 6: Put your mast back up and go sailing!
Here is the end result (Enigma):