13
Deduction for lower wire terminal:
Ø 4 mm wire: – 45 mm (1 3/4”)
Ø 5 mm wire: – 55 mm (2 5/32”)
Ø 6 mm wire: – 70 mm (2 3/4”)
T
Existing forestay length (FL), including rigging screw (See fig. 3.5.a)
FL
=
Furlex fitted above deck, but with the forestay fitting
in the anchor well.
Use the Furlex extension toggle. For a larger gap, use
a custom-made stainless steel bar or rod stay. For Ø 6
only, the Furlex rigging screw or extension link may
also be used.
Short wire pendants are not recommended as forestay
forces may not be distributed evenly, and wire will not
resist the torque which may be produced.
1. Determine the rake of the mast with the fore-/backstay tensioned.
2. Slacken the
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
adjusted. If there is insufficient adjustment in the backstay, and the forestay must be adjusted to allow
removal, first mark its thread with adhesive tape.
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.
Always use a strong ”D” shackle or tie the halyard!
4. Take down the forestay. If it was slackened, adjust the rigging screw back to the tape marks.
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”, in the row
marked FL.
7. Calculate the new wire length WL in Table 1. Refer to the column marked ”example” to see how
this is done.
Your
forestay
Example
Ø5
Table1: Calculation of forestay wire length
3.5.1
H
WL
If a Furlex rigging screw (Ø 6 mm forestay only), links or extra toggles
are to be used, deduct this length (H) from FL.
Cutting measurement. The new forestay wire is to be marked
at this point.
-
-
190
=
13100
Fig. 3.4 d.
9.675
55
9.620
3.5 Calculating the length of the forestay wire