Will try one more time. I am building a trailer & cradle for my CD36. Does anybody out there know where the center of balance is with the spar down? The trailer is a mobile home frame with 5 axles and we are trying to calculate, as close as possible, where to place cradle on the frame. Thanks.
ewood29289@aol.com
CD36
Moderator: Jim Walsh
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Allen Evans
Re: CD36
Ernie - Depends on what weights you've got aboard and where they're located. To answer precisely, you'll have to weigh the boat to find Longitudinal Center of Gravity (LCG).
I don't know Alberg's design numbers, but I can give you an approximation. Skene says the Longitudinal Center of Buoyancy (LCB) should be 54-59% of the design water line (DWL) aft of Station 0 for good windward performance. Station 0 is the intersection of the DWL with the forefoot. The Cape Dory 36 has a DWL = 27 feet. Therefore, the LCB should be 14.6 to 15.9 feet from Station 0. Assuming your boat floats level on her lines, i.e., the bottom of the boot stripe just kisses the water all around, then the LCG and the LCB are aligned and the design LCG is 14.6 to 15.9 feet from Station 0. Removal of the mast and boom will cause a shift aft of the LCG, but I would estimate that effect to be less than 3 inches.
adevans@att.net
I don't know Alberg's design numbers, but I can give you an approximation. Skene says the Longitudinal Center of Buoyancy (LCB) should be 54-59% of the design water line (DWL) aft of Station 0 for good windward performance. Station 0 is the intersection of the DWL with the forefoot. The Cape Dory 36 has a DWL = 27 feet. Therefore, the LCB should be 14.6 to 15.9 feet from Station 0. Assuming your boat floats level on her lines, i.e., the bottom of the boot stripe just kisses the water all around, then the LCG and the LCB are aligned and the design LCG is 14.6 to 15.9 feet from Station 0. Removal of the mast and boom will cause a shift aft of the LCG, but I would estimate that effect to be less than 3 inches.
Ernie Wood wrote: Will try one more time. I am building a trailer & cradle for my CD36. Does anybody out there know where the center of balance is with the spar down? The trailer is a mobile home frame with 5 axles and we are trying to calculate, as close as possible, where to place cradle on the frame. Thanks.
adevans@att.net