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Catalina/Capri 25/250 Sailor's Forums

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VMG jib sheeting

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stampeder
Master Marine Consultant

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1608 Posts

Initially Posted - 02/17/2008 : 15:02:09

RE: Mainsheet Feb 2008 - page T26 - Catalina 27/270 Tech pages

quote:
"Catalina 27 Fleet 8 discovered several years ago that a 155% jib sheeted inboard on top of the coaming, provided better VMG (velocity made good) than either a 155% or 170% genoa sheeted outboard."

I have a 150% genoa (hank-on) and often change sheets from inside to outside of the stanchions for better sheeting angles. Generally, my 110% working jib (hank-on) sheet comes inboard between the aft stanchions.

Tell me, oh wise ones...where should the sheets be for these foresails and does the 27/270 discovery translate to a 25/250?

As you can see, my set-up has the sheet crossing over the lifeline then between stanchions to a genoa car then to my cockpit winch.

Edited by - on

Steve Milby
Past Commodore

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USA
5897 Posts

Response Posted - 02/17/2008 : 16:48:47

The C27s mount genoa tracks and sliding genoa cars on top of their cockpit coamings, forward of the winches, and they lead the jib sheet inside the lifelines through the genoa car, and then to the winch. There's a photo of the set-up in the upper left corner of page T26. That enables them to sheet the genoa much closer to the centerline of the boat, and presumably to point higher. I haven't seen one in action, but by sheeting it closer to the centerline of the boat, it'll begin to backwind the mainsail sooner. I don't know how they deal with that. Perhaps they reef sooner, or perhaps they just ignore it and let it happen.

You could rig a C25 that way, and you could probably use it for PHRF racing, but my first guess would be that it would not be legal in our C25 National Regatta.

Edited by - on

Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 02/18/2008 : 09:02:43

One of the defining design elements of the C-25 is the cruising location of the genoa track. The advantage of infinite options due to its length over the outboard location was helped by the traditional hull shape. A Catalina 25 has a modest beam and narrows from the companionway back, this means the sheeting angle is acceptable for the majority of the situations. The company did ultimately move the tracks off the toe rail and counter sink them into the side decks. The change does help sheeting a little but I think the goal was to move the stanchions to the toe rail and open up the side decks. I think the replacing the handrails with track would be more optimal. It would raise the car above the life line and provide a large enough change in sheeting to warrant the effort.

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Steve Milby
Past Commodore

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USA
5897 Posts

Response Posted - 02/18/2008 : 09:04:33

A couple more things occurred to me. First, this would not be a good system for a cruiser or a shorthanded sailor, because you'd have to go forward and lift the skirt of the genoa over the lifelines every time you tack. If you didn't, then you couldn't trim the jib any closer than you can with the factory stock setup. That would be more hassle for most cruisers than it would be worth. Secondly, now that I think of it, I'm not sure this setup would help a C25 at all. As I recall, I used to be able to trim my genoa inside the lifelines, using the stock setup, and the limiting factors were the upper shrouds and the spreaders. It might help us, but I'm not sure.

The differences between the C27 and the C25 might make it unworkable for us. The C27 is 6" wider at the beam than the C25, and that, along with the length of the spreaders and the positioning of the shrouds, might make it unworkable for us. Before I went to the effort and expense to install it on my boat, I think I'd want to see it in use on a C27, and study it to see if it would work for a C25.

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stampeder
Master Marine Consultant

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1608 Posts

Response Posted - 02/18/2008 : 11:13:45

The different locations of the genoa tracks is news to me.
Frank - did your first C25 have the outside track? and is there a performance or handling difference that you've been able to notice?

I saw this on the C27/270 website (Profile C27)
<blockquote id="quote">quote:<hr height="1" noshade id="quote">The headsail tracks are inboard, allowing close sheeting angles. The standard rigging requires a close inspection, and if it is older than 10 years consider updating <hr height="1" noshade id="quote"></blockquote id="quote">
Interesting - because when I looked at their photo gallery, all the tracks were outboard, like mine.

Edited by - stampeder on 02/18/2008 11:15:20

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