Small Boat Underdeck Furling
The drum is located beneath the deck, lowering tack height for maximized sail area. The single through-deck ball joint provides a low-profile, nearly watertight system that aligns the spool to the headstay. The ball bearing hoistable halyard swivel (optional) allows the sail to be raised and lowered without removing the headstay.
This upside-down, reverse-thrust vang system creates more space in the cockpit, greatly increasing crew mobility. With one end of the gnav system attached to a bracket on the mast and the other to a track and ball bearing car on the boom, the skipper uses the mainsheet to easily adjust leech tension under load.
Small adjustments in jib sheet tension make a huge difference in boat speed. Jib sheets dead-end on free-rolling T2™ Loop blocks attached to pinstop cars and track on each sidetank, lead through two 29 mm T2™ blocks lashed to the jib clew, and trim from two 57 mm Flip-Flop Ratchamatics® with 150 cams mounted on the cockpit walls aft of the track.
The lightweight, but powerful 4:1 mainsheet system uses four all-composite T2™ Loop blocks to lead line to a 75 mm switchable ratchet block on a cockpit-mounted swivel base. The composite sheave spins freely on ball bearings with curved bearing racings. Sideplates are fiber-reinforced, high-strength nylon resin.
The spinnaker sheets lead through 57 mm T2™ Loop blocks to 57 mm Ratchamatic® Flip-Flop blocks on the inside cockpit wall-perfect for asymmetrical chutes that require a ratchet's tough holding power, but must run out instantly during jibes.
All 57 mm and 75 mm Ratchamatic blocks are also available with Power3 sheaves which offer holding power options suitable for a variety of wind conditions. In addition, all 57 mm Ratchamatic blocks can be made with HTE (high threshold engage) sheaves to delay ratchet engagement, allowing them to run freely more of the time. Contact Harken for more information.
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