ADVISER Asst.Prof.Dr.İsmail BAYER

Student

Can Buğra GİRGİN

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.

Light and tough Max power and ease of use Volvo Ocean Race 2013 Amendments

IMOCA Ocean Race Standards

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

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

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.

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

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

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

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

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