Harken Unit 2 Underdeck Furler with Toggle

Harken Unit 1 MKIV Underdog

Harken’s MKIV Underdeck Furling is the perfect solution for performance racers and cruisers who want an aerodynamic system with a minimal amount of equipment above deck. The drum is located beneath the deck, lowering the tack height for maximized sail area.

Specifications:

Wire Ø (1 x 19 SS): 3/8, 5/16 in. (10, 8 mm)

Rod Ø: -12, -17 (7.14, 8.38 mm)

Clevis pin Ø: 5/8 in. (15.9 mm)

Standard headstay length: 60.4 ft. (18.38 m)

Maximum headstay length: 67' 4" (20.51 m)

A minimum: 12 11/16 in. (322 mm)

A maximum: 18 9/16 in. (471 mm)

B: 6 5/8 in. (167 mm)

C minimum: 5 3/8 in. (137 mm)

C maximum: 11 5/16 in. (287 mm)

J: 1 1/4 in. (32 mm)

K: 1 3/8 in. (36 mm)

Extrusion length: 7 ft. (2.13 m)

Luff tape size: #6 (6/32) in. (5 mm)