Page 31 - Harken

GP Catamaran Ceramic GP cat
mainsheet
Asked &
Mainsheet Systems Answered

10:1, 11:1, 12:1 configurations in a single package
Harken’s Grand-Prix mainsheet systems are critically important options for
high-performance beachcats like the Nacra 17 or F18s. The high-efficiency
blocks making up these systems feature insert-molded ceramic bearings that
almost eliminate rolling resistance, greatly improving power transfer to the crew 2800
for easy, precise trimming. These compact blocks feature hardcoat-anodized
sideplates that envelop composite sheaves for easy disassembly/reassembly.
The system profile is the lowest on the market by far. High-performance fairing
increases aerodynamic flow and protects the crew and blocks from impact
damage. The lower block features a built-in cam arm that infinitely adjusts by
loosening two (2) screws with a hex key. A single ratchet sheave in the bottom
block ensures release is controlled and smooth. A snap shackle attaches the
block to the boom. A swivel shackle attaches to the traveler.
Note: the GP mainsheet system is delivered as a 12:1 mainsheet system,
but can be easily reconfigured as a 10:1 or an 11:1 to align with wind or
crew preference. All necessary parts and reeving instructions are included.
Line not included.

Sheave Pin-to-pin Max line Maximum Breaking
Part Ø length Weight Ø working load load
No. Description in mm in mm oz g in mm lb kg lb kg
2800 12:1 GP catamaran mainsheet system 2 5/16 59 8 13/16 224 36.6 1039 5/16 8 1200 545 3600 1636

Two-Speed

Mainsheet Systems (400) (385)

Harken gross-trim/fine-tune mainsheet systems are
easy to install and use. These optimized systems
decrease overall line clutter because they use less line
than traditional gross-trim/fine-tune systems. For fast
trimming, pull both tails of the mainsheet. To fine-tune System System
or to trim using a higher purchase, pull a single tail. 332 383
Two-speed mainsheet systems come in three
configurations for boats from 6.5 m to 11.8 m
(22 - 39'), with mains as large as 32.4 m (350 ft ).
2
2
Systems (401) (386)
Line Ø Max mainsail area
Part Min Max End-boom Mid-boom
No. Description in mm in mm ft² m² ft² m²
332 3:1/6:1 self-contained system* 5/16 8 3/8 10 240 22.3 180 16.9
383 4:1/8:1 self-contained system* 5/16 8 3/8 10 350 32.4 275 25.5
*Line not included.

Components
Sheave Ø
Part Primary Secondary Length Weight
No. Description in mm in mm in mm oz g
385 Double fi ddle 3 76 1 3/4 44 7 3/4 197 21 595
386 Double fi ddle/ratchet/cross block/412 Cam-Matic 3 76 2 1/4, 1 3/4 57, 44 11 1/2 292 37 1049
400 Double/cross block 3 76 2 1/4 57 9 1/2 241 22 625
401 Double fi ddle/ratchet/412 Cam-Matic 3 76 1 3/4 44 7 1/4 184 31 885
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