1. ADVISER
Asst.Prof.Dr.İsmail BAYER
Student
Can Buğra GİRGİN

2. OR Rules &
Restrictions
•Analysis of OR Sail rules and ammendments
•Overview of recent yachts have been searched.
•Overview of main values of yacht and rigging system been searched.
•Physical description of environmental conditions
Modelling
•Line drawings
•Creation of 3D model
•A draft model for rigging system.
Calculations
•Draft and weight distribution
•Sail and rigging modelling
•Righting moment – rigging forces –shroud tension-spreader load calculations
•Lift and Drag calculations under constant values of AWA.
•Scantling of rigging components.

3. Light and tough
Max power and ease of use
Volvo Ocean Race 2013 Amendments
IMOCA Ocean Race Standards

5. Displacement 14.37 t
Volume (displaced) 14.021 m^3
Draft Amidships 0.36 m
Immersed depth 0.36 m
WL Length 21.5 m
Beam max extents on
WL 3.97 m
Wetted Area 65.472 m^2
Max sect. area 1.032 m^2
Waterpl. Area 62.996 m^2
Prismatic coeff. (Cp) 0.632
Block coeff. (Cb) 0.456
LCB length 9.599 from zero pt. (+ve fwd) m
LCF length 8.703 from zero pt. (+ve fwd) m
LCB % 44.647 from zero pt. (+ve fwd) % Lwl
LCF % 40.479 from zero pt. (+ve fwd) % Lwl
KB 0.221 m
KG fluid 0.36 m
BMt 4.602 m
BML 117.704 m
GMt corrected 4.464 m
GML 117.566 m
Immersion (TPc) 0.646 tonne/cm
MTc 0.786 tonne.m
RM at 1deg =
GMt.Disp.sin(1) 1.12 tonne.m

6. Volvo Open 70 Model
Length 21.50 m 21.50m
Beam 5.70m 5.92m
Max draft 4.50m 4.50m
Boat Weight 14000kg 14370kg
Rig Height 31.50m 31.0m
Freeboard at mast 1.6m 2.0m
Main Sail Area 175 m2 151 m2
Foresail Area 200 m2 286 m2

7. The model has the top fractional rig and 4
spreaders similar to Volvo Open 70. For
modelling a mast of 31 m with 4
spreaders , a rigging model is based on
the rules from GL and NBS.

8. G 11120 kg
keel 3250 kg
RMdesign 329616 N.m
CoEf 10.11 m
CoEm 9.945 m
CoEs 15.045 m
CLR 1.01775 m
Am 151 m
Af 135 m
P 25.92 m
E 8.5 m
J 9.5 m
I 25.5 m
SFCm 0.9 m
SFCf 1.1 m
Ftm
15032.26
1 N.m
Ftf
16425.98
1 N.m
Fts
20973.26
6 N.m

10. Main Sail Ftraverse [N]
Clew 3857.21 3857.21 3857.21
Goose neck 0.00 0.00 0.00
spreader 1 771.44 0.00 771.44
spreader 2 2314.33 771.44 2314.33
spreader 3 3857.21 2314.33 3085.77
spreader 4 - 3857.21 3857.21
spreader 5 - - 5400.09
main head
board 4628.65 4628.65 4628.65
15428.84 15428.84 15428.84
Fore Sail Load
Distribution N
Tack 0.30 4927.79
Clew 0.30 4927.79
Head 0.40 6570.39
Σ 16425.98
Spinnaker Load
Distribution N
Tack 0.30 6291.98
Clew 0.30 6291.98
Head 0.40 8389.31
Σ 20973.27

11. 27º 50º 80º 100º 180º Kn
Lm 3670.93 3670.93 2324.92 2080.19 0.00 10 1.5 1.5 0.95 0.85 0
14683.72 14683.72 9299.69 8320.78 0.00 20 1.5 1.5 0.95 0.85 0
33038.38 33038.38 20924.31 18721.75 0.00 30 1.5 1.5 0.95 0.85 0
58734.90 58734.90 37198.77 33283.11 0.00 40 1.5 1.5 0.95 0.85 0
Lfs 6952.89 2317.63 1390.58 0.00 0.00 10 1.5 0.5 0.3 0 0
27811.56 9270.52 5562.31 0.00 0.00 20 1.5 0.5 0.3 0 0
62576.00 20858.67 12515.20 0.00 0.00 30 1.5 0.5 0.3 0 0
111246.23 37082.08 22249.25 0.00 0.00 40 1.5 0.5 0.3 0 0
Lsp 0.00 8508.78 5672.52 4821.64 0.00 10 0 1.5 1 0.85 0
0.00 34035.12 22690.08 19286.57 0.00 20 0 1.5 1 0.85 0
0.00 76579.02 51052.68 43394.78 0.00 30 0 1.5 1 0.85 0
0.00 136140.49 90760.32 77146.28 0.00 40 0 1.5 1 0.85 0
Dm 48.95 367.09 1957.83 2447.29 2202.56 10 0.02 0.15 0.8 1 0.9
195.78 1468.37 7831.32 9789.15 8810.23 20 0.02 0.15 0.8 1 0.9
440.51 3303.84 17620.47 22025.59 19823.03 30 0.02 0.15 0.8 1 0.9
783.13 5873.49 31325.28 39156.60 35240.94 40 0.02 0.15 0.8 1 0.9
Dfs 92.71 1158.81 695.29 0.00 0.00 10 0.02 0.25 0.15 0 0
370.82 4635.26 2781.16 0.00 0.00 20 0.02 0.25 0.15 0 0
834.35 10429.33 6257.60 0.00 0.00 30 0.02 0.25 0.15 0 0
1483.28 18541.04 11124.62 0.00 0.00 40 0.02 0.25 0.15 0 0
Dsp 0.00 1418.13 5105.27 6807.02 3743.86 10 0 0.25 0.9 1.2 0.66
0.00 5672.52 20421.07 27228.10 14975.45 20 0 0.25 0.9 1.2 0.66
0.00 12763.17 45947.41 61263.22 33694.77 30 0 0.25 0.9 1.2 0.66
0.00 22690.08 81684.29 108912.39 59901.81 40 0 0.25 0.9 1.2 0.66

13. N N N
D1 11087.47 D1 11087.47 D1 11087.47
β1 24 β1 24 β1 24
V2 10395.34 V2 10395.34 V2 10486.21
β2 30 γ2 13 β2 30 γ2 13 β2 30 γ2 15
C2 2171.24 C2 2171.237 C2 1795.647
D2 8530.46 D2 8530.46 D2 7779.282
β3 28 γ3 2 β3 28 γ3 2 β3 28 γ3 0
V3 7388.72 V3 7387.596 V3 6737.056
C3 6345.81 C3 6345.849 C3 6603.672
β4 20 γ4 -1 β4 21 γ4 0 β4 20 γ4 0
D3 21521.80 D3 21521.89 D3 22071.07
V4 19005.52 V4 19002.7 V4 19487.59
C4 4347.62 C4 4015.889 C4 3758.065
D4 25017.98 D4 22951.05 D4 23294.24
β5 23 γ5 0 β5 19 γ5 0 β5 23 γ5 0
V5 23509.21 V5 21426.65 V5 21889.42
C5 8224.96 C5 8224.922 C5 7967.098
D5 33772.92 D5 40532.5 D5 33112.97

15. m Ix PT (N)
8.00 29382912 176580
7.00 29234169 165727
6.00 20464355 157904
5.00 13559766 150664
3.00 4728872 145953
79081435
Ixx 7908 cm4