Join Date: Apr 2015
Location: PacIslander in Midwest
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Re: Coronado 23 mast and rudder questions
Okay, Columbia mast waall thickness makes it heavy, about 50lbs....
mathematical way to plot the lower shroud pin, is to measure the chain plate from the center of boat keel line, make that A (x itself), existing shroud length will be B (x itself), now take the Asquared add to Bsquared = squared distance up mast FROM CHAIN PLATE HEIGHT (or square root of sum of AB).
That is not the way that I would do it, honestly. Faster for me is to:
Hang/tie mast from bridge highest up mast, while boat parked below
Get my 40' ext. ladder and set it on bridge from cockpit.
I would adj my shroud turnbuckles half threaded, hold all lower shrouds in hand with straps on ends, climb ladder and carefully position them at slack's end, skip to drilling part
IF NO LADDER: then hook my main hly'd to the upper pin of the lower shroud,
tie or snap a noose around the mast to the pin/hly'd shackle to keep it ,
then hoist my halyard up until at end position, while having mast held up.
Drill a hole through the mast side at the location that your shrouds ended up
Use two strap plates overlapping each other with pin size holes in each end
or make a triangular, double pinhole upper chainplate to hold both shrouds with a third hole centered to hold mast thru bolt. (If you can find a low pedestrian or quiet traffic overpass/bridge, to hang your mast from, it would be better....bio, filtered fresh veggie, an elec car, a hybrid car , 3 army multifuels and 7 sailboats, wind turbine and solar panel this summer.