11
3.5 Calculating the length of the rod forestay
1. Determine the rake of the mast with the fore-/backstay tensioned.
2. Slacken
backstay
as much as possible. But make sure that any rigging screw is not unscrewed so
far that the threads are no longer visible "on the inside". The forestay setting should not be adjus-
ted. However, if the forestay rigging screw setting has to be adjusted, measure the length or mark
the original setting.
3. Pull the masthead forward using the genoa halyard. Secure the halyard using a "D" shackle or tie it
to a strong deck fitting. For safety reasons, do not use the halyard snap shackle.
4. Take down the forestay. (If the rigging screw was adjusted, return it to its original setting.)
5. Measure the forestay length (FL)
with just enough tension to keep it straight.
6. Enter the measurement in
"Calculation Table 1"
below, under the heading "Your forestay", on the
row marked FL.
7. Calculate the new rod length WL in
"Calculation Table 1"
. Refer to the column marked "example"
to see how this is done.
Always use a strong "D" shackle or tie the halyard!
3.5.1
Calculation Table 1: Length of rod forestay
Your
extrusion
Example
(200 TD -8)
FL
Existing forestay length (FL), without preload,
including rigging screw (See fig. 3.5 a.)
CH
Add the distance between the forestay fixing hole in the deck fitting and the deck
level. Measure in line with the forestay. (See fig. 3.5.a.)
+
+
FLD
FL + CH = FLD. =
FLD also corresponds with the theoretical distance that can be measured from
the boat’s rigging diagram.
TDH
Deduction for Furlex TD’s high above deck.
-
-
NFL
New forestay length=
T
Deduction for
-
-
H
If links or extra toggles are to be used, deduct
this length (H) from FL. (See table 3.3.3.)
-
-
WL
See fig 3.5.a
TD deduction
200 TD
145 mm
300 TD
170 mm
400 TD
250 mm
12.700
70
Rod diameter
Navtec
OYS
(Rigging)
BSI
Without
rigging screw
200 TD
-8 (ø 5.7 mm)
•
•
•
70
-10 (ø 6.4 mm)
•
•
•
75
-12 (ø 7.1 mm)
•
-
•
85
-15 (ø 7.5 mm)
•
•
•
85
300 TD
-12 (ø 7.1 mm)
•
-
•
85
-15 (ø 7.5 mm)
-
•
•
85
-17 (ø 8.4 mm)
•
-
•
90
-22 (ø 9.5 mm)
•
•
•
90
400 TD
-22 (ø 9.5 mm)
•
•
•
110
-30 (ø 11.1 mm)
•
•
•
110
-40 (ø 12.7 mm)
•
•
•
135
50
145
12.535
12.605
Summary of Contents for Furlex 200 TD
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