A Class Catamaran Tuning Guide

MAST

UPWIND

DOWNWIND

WIND SPEED

Knots

SPREADER RAKE

PREBEND

CUNNIGHAM

BATTENS
(Top 4 battens)

MAST
ROTATION

CUNNIGHAM

MAST
ROTATION

TRAVELER

(off the center line if foling)

5-8

42 mm

20 mm

OFF

Light

45-50 degrees

OFF

80 degree
if foiling

180 mm

8 – 12

56 mm

27 mm

15 – 40%

Light
Medium (10+ kts)

35-45 degrees

10 – 25%

70 degrees

220 mm

12 – 16

60 mm

32 mm

100%

Medium

25 – 30 degrees

60 – 75%

65 degrees

300 – 400 mm

16 – 20

75 mm

38 mm

100%

Medium

Heavy (18+ kts)

20 – 25 degrees

80%

80 degrees

500 mm

20 – 24

90 mm

42 mm

100%

Heavy

20 – 25 degrees

80%

80 degrees

500 mm (Hang on!)