JY
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This is a list of current active JY projects. If you're working on a project that isn't on this list, please add it and let people know how they can get in touch with you to help.
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Spinnakers
There are currently 3 different ideas on how the spinnaker rigging could be done. I'm trying to give an outline and approximation here. Note accuracy of measurements: approx. - measurement in accurate enough to be practicable, est. - measurement was estimated or guessed, without any qualifiers - exact measurement.
The JY Turbo rig
Part of the "official" Hunter Composite "JY Turbo" Kit (the other part is the trapeze rig). The kit includes a different mast ["Turbo Mast (Dwyer Dm3 section)"].
Guy: Goes through a hook 6" forward of the shroud, then attaches to a clam cleat (open top) 5-1/2" aft of the shroud.
Sheet: Goes through a "bullseye" fairlead 29" aft the shroud. Supposedly the crew will do the trimming with the sheet across the boat, possible also while trapezing.
Halyard: Cleated with a Harken micro cam-matic on bottom aft of centerboard trunk. Routing of halyard unclear, possibly inside mast.
Topping lift: Unclear. Either fixed on mast, or adjustable on mast.
Foreguy: Probably goes to CL211 Mk1 clam cleat 5" forward of aft edge of deck.
Spinnaker pole launch/store system: Hook mast end of pole into cord running both sides of boom. Push backwards along boom. Attach Guy end of pole to boom using a loop of shock cord.
Ethan's & Geoff's rig
Ethan and Geoff did some experimental rigging of JY4. Guy and sheet rig is only complete on the starboard side so far.
This description is based on my memory. Especially the halyard/topping lift information is subject to correction.
Guy: Similar to JY turbo. Currently only starboard is equipped.
Sheet: Probably to stern-mounted standup blocks, then to deck-mounted cheek block est. 12" aft of shroud. The cheek block currently exists only on starboard. It was mounted with a single center screw and seems to be somewhat torn from use.
Halyard: Block on mast near headstay. Horn cleat on mast.
Topping lift: Block on mast, est. 2' below headstay. Clam cleat on mast.
Foreguy: Block on deck, an est. 6" in front of mast. Cam cleat on deck, starboard of mast.
Pole store system: Boom cord similar to JY Turbo. Shock cord fixture not present.
Ed's rig
Ed recommended the following rig, based on his experience and his familiarity with spinnaker rigs on similar performance dinghies.
Guy: Goes to side entry clam cleat in front of shroud. Entry pointing outside. Clam cleat design makes a guy hook unnecessary.
Sheet: Goes to block mounted est. 5' back of shroud. This block is attached to the hull by a piece of cord that runs in a loop through two holes 1" from the edge of the hull. This would allow the block to hang outside the boat when not used. Sheet continues to block mounted on the transom or attached to the outside ends of the traveler line. Then to block mounted inside the hull, est. 2' back of shroud. Cleats to cam cleat mounted est. 6" above the last block. This construction would allow the sheet to be cleated on either side of the boat, and to be used by either crew or helm, since the block and cleat are in between crew and helm position.
Halyard: not discussed.
Topping lift/foreguy: fixed and equipped with est. 1' of shock cord, attached across est. 2' of the lift/foreguy line. This would allow the pole to move up and down within the limits of the line running parallel to shock cord. The reasoning is that topping lift and foreguy rarely need adjustment beyond the limits of the shock cord, and can be adjusted simply by tensioning the guy.
Pole store system: Similar to JY Turbo.
Plan to complete JY4
This is one idea of how the JY4 spinnaker might be completed.
Guy
On the port side, use a clam cleat as suggested by Ed. Starboard side keeps guy hook & clam cleat combo - we can then compare which solution we like better. [Suitable clam cleats] - C218 Mk1, C218 Mk2. Mk2 looks like it's rounder where the guy goes, but has smaller base. We can probably use Mk1's which we have in the toolshed already.
Sheet
- Keeping the standup blocks on the stern might be less desirable. They might be too far back. Ed suggests blocks more forward, and the JY turbo kit puts them even more forward.
- For a first try, a solution where the crew holds the sheet at all times (no cleats) may be suitable. This could just be the current stern blocks.
- Mounting blocks on a cord as suggested by Ed could be the most universal solution - it can be used to route the sheet directly to the crew, or across further blocks on the stern and on the inside wall to a cam cleat. It is also the least intrusive, featuring only two holes through the outer hull joint.
Halyard, Foreguy, Topping lift
Keep current rig. Ed's suggestions can be easily tried out without having to modify any of the standing rig.
Pole storage
Add shock cord to attach guy end of pole.
Trapeze - Chris and Allan
The trapeze shock cord needs to be long and friction free; so it goes around a block on the bow rather than under the sub-deck and around the mast. It needs to be long because a single-handing trapeze artist needs to be further astern than the crew position.
Trapeze height adjusting can be done at least four different ways:
- v-jam
- cam-cleat
- rope-lock
- two position trapeze hook
Full v-jam assemblies are expensive, about $70 * 2 from West Marine or APS. A rope-lock and a nylon handle from murrays.com is cheap, about $8 * 2.
Bow Reinforcement - Peter
Our JY15's have made it through more than ten years of intensive sailing, mostly by beginners, without the babying that owners usually provide, and they still have the lips on their bows. Next door, only three out of 11 hulls have intact bows, the rest have had the lips cracked off by collisions with the dock. Here's the reinforcement that allows us to mount effective bumpers.
