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post #43 of Old 01-12-2018
outbound
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Re: Stated Displacement vs Real Life

Seems interesting to me that in these days of CAD, ability to computer generate water plane at any heel angle, computor generated sailing polars and computer generate behavior at various loads why builders donít just give you a disc describing your boat. They could throw in the GZ curve and other key info to make even the engineers among us happy campers.
Over time you learn your boat but itís hard. Example Iíve learned unlike some of my prior boats on this one flat is fast. On open boat derivatives not so much. They should heel some. Iím a slow learner so on a day when youíre running the same course and have the same wind you have the time and ability to fool around. On the current boat if we heel too much we go slower. At anything over ~20 degrees think we dig a hole. Also donít point as well. Counterintuitively weíre faster reefed and point higher. Getting the engine off the rail and dinghy on deck=faster. Moving the anchor aft= no noticeable difference. Total amount of fuel/water doesnít matter so much but using up leeward tanks first big difference. Would think all of this is predictable. Believe current builders/NAs are smart and use these tools. Sits on a drive or disc already. Instead of not knowing what the few numbers they share really mean donít understand why they donít just share the information they have already internally generated for their own use.

s/v Hippocampus
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