H37 draft
- Thread starter jphud
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e been told that the shoal draft keels are not as efficient as the deeper keels. Unless you are a racer, I doubt it will matter much.
If you are a racer, it is common in PHRF to grant a time allowance for shoal draft, so in theory, practical difference is zero. Fact is you should be able to point higher with a deeper keel, but if you only have a100-105% yankee and it sheets to the toe rail, you will not be able to sail as high as someone with no staysail and inboard genoa tracks, like Blaise (Midnight Sun)
I have sailed both versoins and the difference is dramatic. The deep draft boats points much higher. With a 135% genoa and inboard tracks, Midnight Sun will point higher than most of the small J boats. (22,24,27,29, and 30) The two hulls are different. A shoal draft 37 is not just a deep draft with a foot cut off of the keel. The keel is substantally longer. (A couple feet) Phrf does give an allowance for he shoal draft, but it is not enough to make the boats equal. The shoal draft boat is also much heavier. It takes more weight to achieve the same righting moment since it is not down as far. JC also originally drew the shoal draft boat with a centerboard. That version never made it into production, and Hunter filled the slot with concrete. These boats are totally different animals when sailed as a sloop with inboard tracks.
Hello Blaise:
I've been vacillating about adding inside tracks to my 1980 H36 almost ever since I bought my boat 5 years ago. So I perked up reading your above sentence.
With my chainplates/shrouds located nearer the toe rail than the cabin, I've been confused about leading the jib sheets inside or outside the shrouds. Currently with toe rail sheeting, the sheet and/or the 135 clue area is only a few inches outside of the shrouds when close-hauled and sheeted firmly. Because of the shrouds and routing the sheets outside of them, it seems that I couldn't bring the clue much more towards the center line with an inside track than with toe rail sheeting? So maybe not that much improvement in pointing? And routing the sheets inside the shrouds would undesirable/inconvenient when sailing off the wind.
What am I missing / not understanding? How do you lead the sheets to your inside track on Midnight Sun? Looking at a pic or two of the Cherubini 37c side deck, the chain plates/shrouds distance from the toe rail appears not much different than with the 36. (Pic of my side deck attached for your view.)
Any insights will be appreciated. Better pointing would be a great improvement for me on SF Bay for every outing. Of course my jib and Genoa are well past their aerodynamic prime ... but that's another topic. My Hunter Cherubini 36 draws 4' 11".
thanks,
rardi
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The jib sheets run outside the shrouds. You couldn't run them inside under any condition because the spreaders would be in the way. You are olny pulling the trailing edge (leech) and clew of the sail inboard. Hard on the wind my genoas are still a couple of inches off the spreader tips, and mu spreader tips are three inches longer than original to accomodate the rod rigging.
Blaise: Thanks the info. Very useful.
Since when I toe rail sheet my 135 and the sail comes close to the shrouds (and also my sail is just off the spreaders as well), then the benefit of the inside track must be improved overall sail shape -- better better pointing rather than brute force sheeting tight from the toe rail.
So do you think I should make the mod? -- Non racer but very frequent boat user who enjoys tweaking for improvement.
Sorry if construction of this message is off -- Pick-up your message at the top of Northstar-at-Tahoe ski resort while seeking a few minutes shelter from the blizzard outside. Typed on my B'berry. A bit of a risk.
Since when I toe rail sheet my 135 and the sail comes close to the shrouds (and also my sail is just off the spreaders as well), then the benefit of the inside track must be improved overall sail shape -- better better pointing rather than brute force sheeting tight from the toe rail.
So do you think I should make the mod? -- Non racer but very frequent boat user who enjoys tweaking for improvement.
Sorry if construction of this message is off -- Pick-up your message at the top of Northstar-at-Tahoe ski resort while seeking a few minutes shelter from the blizzard outside. Typed on my B'berry. A bit of a risk.
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