195
7412.30
7413.30
A
C
B
7412.11 5/8
7413.11 3/4
7413.11 7/8
7412.31
7413.31
Francis Lee, 18.9 m (62'), Perry Sliver, Robert H. Perry design, Northwest School of Boatbuilding © Boomer Depp 
Dimensions
MKIV Underdeck Unit 2
Typical Boat Length 10.6 - 14.2 m (35' - 46')
Wire Ø (1 x 19 SS)
Rod Ø
Clevis pin Ø
8, 10 mm (5/16", 3/8")
-12, -17 (7.14, 8.38 mm)
15.9 mm (5/8")
Headstay Length  Standard 18.38 m (60'4"); max 20.51 m (67'4")
Part No. 
Description
 7412.11 5/8 
 Furling system with 15.9 mm (5/8") clevis pin 
 Optional Parts 
 7412.30 
 Extra 2.13 m (7') luff foil extrusion 
 7412.31 
 Extra 229 mm (9") connector with bushings 
MKIV Underdeck Unit 3
Typical Boat Length 13.7 - 18.3 m (45' - 60')
Wire Ø (1 x 19 SS)
Rod Ø
Clevis pin Ø
11, 12 mm (7/16", 1/2")
-22, -30 (9.53, 11.1 mm)
19.1, 22.2 mm (3/4", 7/8")
Headstay Length  Standard 22.88 m (75'1"); max 25.02 m (82'1")
Part No. 
Description
 7413.11 3/4 
 Furling system with 19.1 mm (3/4") clevis pin 
 7413.11 7/8 
 Furling system with 22.2 mm (7/8") clevis pin 
 Optional Parts 
 7413.30 
 Extra 2.13 m (7') luff foil extrusion 
 7413.31 
 Extra 248 mm (9 3/4") connector with bushings 
Unit
Part
No.
A
B
C
Min
Max
Min
Max
in
mm
in
mm
in
mm
in
mm
in
mm
2
 7412.11 5/8 
 12 11/16 
 322 
 18 9/16 
 471 
 6 5/8 
 167 
 5 3/8 
 137 
 11 5/16 
 287 
3
 7413.11 3/4 
 16 1/8 
 410 
 23 5/8 
 600 
 8 3/16 
 208 
 6 7/8 
 175 
 14 3/8 
 365 
3
 7413.11 7/8 
 16 9/16 
 421 
 24 1/4 
 616 
 8 3/16 
 208 
 7 5/16 
 186 
 15 
 381 

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