14
Length of distance tube E =
If the top extrusion is shorter than 700 mm (27 9/16”) (500 S: 1000 mm (39
3/8”)), the joint will be too near the top. In this case replace the uppermost
full length 2400 mm extrusion (500 S: 4800 mm) with the 1700 mm (500 S
2000 mm (78 3/4”)) extrusion. In this way the joint is moved 700 mm (27
9/16”) (500 S: 2800 mm (110 1/4”)) down the stay. Adjust the C and D
measure ments as follows: Deduct 700 mm (27 9/16”) (500 S: 2800 mm (110
1/4”)) from the C measurement.
Add 700 mm (27 9/16”) (500 S: 2800 mm (110 1/4”)) to the D measurement.
(6 profiler)
-
3.6.1
540
1.355
500 S
C
17.675
1.380
16.295
14.400
1.895
Table 2: Calculation of luff extrusion length
Length of new forestay wire (as per
Table 1)
Deduction:
-
3.6 Calculating the length of the luff extrusion
1. Insert the length of the new forestay wire (WL) as calculated in
”Table 1”
into
”Table 2”
, in the
row marked WL.
2. Calculate the number of full length extrusions and the length of the top extrusion.
Fixed deduction (A+B):
C+D=
WL
A+B
C+D
400 S
C
D
Max. number of 2400 mm (94 1/2”) extrusions which together are
shorter than C+D: [ ............ex x 2400 = C ]
C=
Length of top extrusion =
The top extrusion is normally cut from the 1700 mm (67”) (500 S: 2000 mm (78
3/4”)) extrusion. Round the edges of the cut end using a file.
Cut the distance tube for the top extrusion in accordance with
the following fixed deduction:
E
-
=
Your
extrusion
Example
(400 S/Ø14)
with rigging screw
-
-
1395
=
1395
-
1395
Max. number of 4800 mm (189”) extrusions which together are
shorter than C+D: [ ............ex x 4800 = C ]
C=
-
1395
=
=
2115
=
Without rigging screw:
Ø12 mm wire: 1450 mm
(57 1/16”)
Ø14 mm wire: 1470 mm
(57 7/8”)
Ø16 mm wire: 1395 mm
(54 15/16”)
With rigging screw:
(with rigging screw 50% extended
adjustable ± 50 mm (2”) )
400 S
500 S
Ø12 mm wire: 1340 mm
(52 3/4”)
Ø14 mm wire: 1380 mm
(54 5/16”)
Ø16 mm wire: 1310 mm
(51 9/16”)
Ø12 mm wire: E=D –510 mm
(20”)
Ø14 mm wire: E=D –560 mm
(22 1/8”)
Without rigging screw:
With rigging screw:
(with rigging screw 50% extended
adjustable ± 50 mm (2”))
400 S
500 S
Ø12 mm wire: E=D –495 mm
(19 1/2”)
Ø14 mm wire: E=D –540 mm
(21 1/4”)
Ø16 mm wire: E=D –570 mm
(22 7/16”)
Ø16 mm wire: E=D –545 mm
(21 7/16”)
