Jean-François Masset – September 2021 jfcmasset@outlook
51
2021 09 Velocity prediction examples with « Gene-VPP Sailboat 3.2 » Jean-François Masset – September 2021 [email protected] « Gene-VPP 3.2 » spreadsheet application is here illustrated through 10 examples : – V1 modern classic sailboat (the reference boat in « Gene-Hull Sailboat 3.2 ») – Boat U1 modern style sailboat – Classic 6mJI – T37, inspired by Tina / Dick Carter – S30, inspired by S30 / Knud Reimers – M32, inspired by Melges 32 / Reichel Pugh – Blue Water 39, inspired by Corbin 39 / Robert Dufour - Marius Corbin – Dolfi 32S, inspired by Beneteau Figaro III / VPLP – ULDB 40, inspired by Santa Cruz ULDB designs / Bill Lee – Syd 38, inspired by the Sydney 38 / Murray Burns Dovell
Transcript of Jean-François Masset – September 2021 jfcmasset@outlook
2021 09
Velocity prediction examples with « Gene-VPP Sailboat 3.2 »Jean-François Masset – September 2021 [email protected]
« Gene-VPP 3.2 » spreadsheet application is here illustrated through 10 examples :
– V1 modern classic sailboat (the reference boat in « Gene-Hull Sailboat 3.2 »)– Boat U1 modern style sailboat– Classic 6mJI– T37, inspired by Tina / Dick Carter– S30, inspired by S30 / Knud Reimers– M32, inspired by Melges 32 / Reichel Pugh– Blue Water 39, inspired by Corbin 39 / Robert Dufour - Marius Corbin – Dolfi 32S, inspired by Beneteau Figaro III / VPLP– ULDB 40, inspired by Santa Cruz ULDB designs / Bill Lee– Syd 38, inspired by the Sydney 38 / Murray Burns Dovell
Boat V1 modern classic daysailer
Loa 10,30 m ; Lwl 8,00 m ; B 2,60 m ; Draft 1,75 m ; Light weight : 2642 kg ; Keel-bulb 1090 kg
-200 -100 0 100 200 300 400 500 600 700 800 900 1000
-200
-100
0
100
200
-200 -100 0 100 200 300 400 500 600 700 800 900 1000
-200
-100
0
100
200
-150 -100 -50 0 50 100 150
-200
-150
-100
-50
0
50
100
150
-150 -100 -50 0 50 100 150
-200
-150
-100
-50
0
50
100
150
Sailplan
-200 -100 0 100 200 300 400 500 600 700 800 900 1000
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)43,53 5,37 0,85 13,23 24,01 68,34 6,35
Gene-VPP input data for V1 with a loading of 300 kg (crew sit windward)>>> this table copy/special paste from Gene-Hull Sailboat 3.2 :
>>> Output
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing
8,27 2,23 0,39 2,60 0,54 47,55 12,52 43,53 5,37 0,85 13,23 24,01 68,34 6,35 1,00Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,09749 2,37 1,15 0,05190 1,30 1,55 0,28 0,01486 0,91 0,40 2942 1,77
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°2,943 12,239 15,281 18,21 17,51 17,09
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
10
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
2
4
6
8
10
12
14
16
18
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,5 10,00,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
Boat U1 modern style sailboat
Loa 8,65 m ; Lwl 8,00 m ; Boa 3,34 m ; Draft 1,75 m ; Displacement : 2937 kg ; Keel-bulb 1152 kg
-100 0 100 200 300 400 500 600 700 800 900
-200
-100
0
100
200
-100 0 100 200 300 400 500 600 700 800 900
-200
-100
0
100
200
-200 -150 -100 -50 0 50 100 150 200
-200
-150
-100
-50
0
50
100
150
-200 -150 -100 -50 0 50 100 150 200
-200
-150
-100
-50
0
50
100
150
Sailplan :
-100 0 100 200 300 400 500 600 700 800 900
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)48,74 5,86 0,90 14,47 26,56 77,66 6,86
SA-VPP input data for S30 with a loading of 300 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing
8,25 2,85 0,30 3,34 0,55 47,32 16,78 48,74 5,86 0,90 14,47 26,56 77,66 6,86 1,00Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,10589 2,55 1,15 0,05190 1,30 1,55 0,28 0,02815 1,79 0,38 3237 1,77
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°2,943 23,488 26,751 23,05 19,37 19,06
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
10
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
5
10
15
20
25
30
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,5 10,00,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
Classic 6mJI
Loa 10,30 m ; Lwl 7,30 m ; B 2,21 m ; Draft 1,66 m ; Light weight : 4046 kg ; Ballast : 2018 kg
-150 -100 -50 0 50 100 150
-200
-150
-100
-50
0
50
100
150
-300 -200 -100 0 100 200 300 400 500 600 700 800 900 1000
-200
-100
0
100
200
-300 -200 -100 0 100 200 300 400 500 600 700 800 900 1000
-200
-100
0
100
200
-150 -100 -50 0 50 100 150
-200
-150
-100
-50
0
50
100
150
Sailplan :
-300 -200 -100 0 100 200 300 400 500 600 700 800 900 1000
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)44,31 5,25 0,78 13,17 24,43 69,58 6,17
Gene-VPP input data for Classic 6mJI with a loading of 360 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing
7,48 2,09 0,68 2,22 0,53 47,48 10,98 44,31 5,25 0,78 13,17 24,43 69,58 6,17 1,00Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,10716 2,29 1,60 0,10883 2,20 2,20 0,37 0,01200 0,84 0,35 4406 1,69
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°3,532 9,380 11,850 18,99 18,96 19,00
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
2
4
6
8
10
12
14
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,50,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
T37, inspired by Tina / Dick Carter
Loa 11,25 m ; Lwl 8,13 m ; B 3,30 m ; Draft 1,83 m ; Light weight : 5647 kg ; Ballast : 2669 kg
-200 -150 -100 -50 0 50 100 150 200
-200
-150
-100
-50
0
50
100
150
-300 -200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100
-200
-100
0
100
200
-300 -200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100
-200
-100
0
100
200
-200 -150 -100 -50 0 50 100 150 200
-200
-150
-100
-50
0
50
100
150
Sailplan :
-300 -200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)57,98 6,24 0,95 15,20 28,87 101,89 7,18
Gene-VPP input data for T47 with a loading of 300 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing
8,23 2,82 0,65 3,30 0,54 47,45 16,12 57,98 6,24 0,95 15,20 28,87 101,89 7,18 1,00Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,36490 4,99 2,10 0,00000 0,00 0,00 0,00 0,05642 1,73 0,70 5947 1,85
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°2,943 20,356 26,895 24,99 24,42 24,19
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
5
10
15
20
25
30
35
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,00,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
5,5
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
S30, inspired by the S30 / Knud Reimers
Loa 12,50 m ; Lwl 9,9 m ; B 2,50 m ; Draft 1,55 m ; Light weight : 4269 kg ; Ballast : 1501 kg
-150 -100 -50 0 50 100 150
-200
-150
-100
-50
0
50
100
150
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-200
-100
0
100
200
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-200
-100
0
100
200
-150 -100 -50 0 50 100 150
-200
-150
-100
-50
0
50
100
150
Sailplan :
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)42,61 5,25 0,87 13,18 24,50 63,37 6,30
Gene-VPP input data for S30 with a loading of 300 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing10,11 2,10 0,52 2,50 0,54 47,85 14,54 42,61 5,25 0,87 13,18 24,50 63,37 6,30 1,00
Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,36903 5,65 3,30 0,00000 0,00 0,00 0,00 0,03269 1,36 0,64 4569 1,57
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°2,943 12,075 16,000 23,78 23,64 23,59
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
10
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
2
4
6
8
10
12
14
16
18
20
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,50,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
M32, inspired by Melges 32 / Reichel Pugh
Loa 9,70 m ; Lwl 9,09 m ; B 3,00 m ; Draft 2,13 m ; Light weight : 1722 kg ; Ballast : 775 kg
-200 -150 -100 -50 0 50 100 150 200
-250
-200
-150
-100
-50
0
50
100
-100 0 100 200 300 400 500 600 700 800 900 1000
-200
-100
0
100
200
-100 0 100 200 300 400 500 600 700 800 900 1000
-300
-200
-100
0
100
200
-200 -150 -100 -50 0 50 100 150 200
-250
-200
-150
-100
-50
0
50
100
Sailplan :
-100 0 100 200 300 400 500 600 700 800 900 1000
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)44,53 5,37 0,92 12,86 24,06 71,66 6,17
Gene-VPP input data for M32 with a loading of 600 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing
9,50 2,34 0,22 3,00 0,57 45,32 15,34 44,53 5,37 0,92 12,86 24,06 71,66 6,17 1,00Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,04476 2,00 0,58 0,03953 0,78 1,50 0,25 0,01133 0,96 0,35 2322 2,17
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°8,240 20,067 22,018 19,69 17,13 15,85
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
10
11
12
13
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
5
10
15
20
25
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,02,5
3,03,5
4,04,5
5,05,5
6,06,5
7,07,5
8,08,5
9,09,5
10,010,5
11,011,5
12,012,5
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
Blue Water 39, inspired by Corbin 39 / Robert Dufour – Marius Corbin
Loa 11,46 m ; Lwl 9,72 m ; B 3,73 m ; Draft 1,68 m ; Light weight : 10891 kg ; Ballast : 4073 kg
-250 -200 -150 -100 -50 0 50 100 150 200 250
-200
-150
-100
-50
0
50
100
150
200
-100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-200
-100
0
100
200
-100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-200
-100
0
100
200
-250 -200 -150 -100 -50 0 50 100 150 200 250
-200
-150
-100
-50
0
50
100
150
200
Sailplan :
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)85,63 7,24 1,52 16,48 44,87 139,43 8,29
Gene-VPP input data for Blue Water 39 with full loading for a displacement of 14000 kg
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing10,03 3,57 0,88 3,71 0,60 47,07 25,86 85,63 7,24 1,52 16,48 44,87 139,43 8,29 1,00
Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,96865 7,69 4,65 0,00000 0,00 0,00 0,00 0,10547 2,22 0,97 14000 1,80
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°0,000 54,375 74,211 40,03 39,33 39,09
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
10
20
30
40
50
60
70
80
90
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,00,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
Dolfi 32S, inspired by Beneteau Figaro III / VPLP
Loa 9,75 m ; Lwl 9,40 m ; B 3,47 m ; Draft 2,20 m ; Light weight : 2977 kg ; Ballast : 1248 kg
-200 -150 -100 -50 0 50 100 150 200
-250
-200
-150
-100
-50
0
50
100
150
200
-100 0 100 200 300 400 500 600 700 800 900 1000 1100
-200
-100
0
100
200
-100 0 100 200 300 400 500 600 700 800 900 1000 1100
-300
-200
-100
0
100
200
-200 -150 -100 -50 0 50 100 150 200
-250
-200
-150
-100
-50
0
50
100
150
200
Sailplan :
-100 0 100 200 300 400 500 600 700 800 900 1000 1100
-400
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)57,14 6,04 1,09 14,48 31,51 89,69 6,99
Gene-VPP input data for Dolfi 32S with a loading of 160 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing
9,33 2,71 0,27 3,47 0,57 45,88 18,42 57,14 6,04 1,09 14,48 31,51 89,69 6,99 1,00Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,06449 2,17 0,70 0,06849 1,13 1,80 0,30 0,01876 1,73 0,34 3137 2,21
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°1,962 24,903 30,097 24,05 20,67 18,61
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
10
11
12
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
5
10
15
20
25
30
35
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,5 10,010,511,011,50,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
ULDB 40, inspired by Santa Cruz ULDB designs / Bill Lee
Loa 12,09 m ; Lwl 10,55 m ; B 2,93 m ; Draft 1,80 m ; Light weight : 2923 kg ; Ballast : 1200 kg
-200 -150 -100 -50 0 50 100 150 200
-200
-150
-100
-50
0
50
100
150
200
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-200
-100
0
100
200
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-200
-100
0
100
200
-200 -150 -100 -50 0 50 100 150 200
-200
-150
-100
-50
0
50
100
150
200
Sailplan :
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)47,50 5,72 1,12 13,04 24,77 79,58 6,61
Gene-VPP input data for ULDB 40 with a loading of 140 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing10,69 2,38 0,31 2,93 0,55 46,77 16,80 47,50 5,72 1,12 13,04 24,77 79,58 6,61 1,00
Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,09178 2,54 1,15 0,07267 1,66 1,70 0,31 0,01658 1,00 0,38 3063 1,81
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°1,648 15,274 18,973 22,95 21,16 20,23
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
10
11
12
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
5
10
15
20
25
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,5 10,010,511,011,50,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
Syd 38, inspired by the Sydney 38 / Murray Burns Dovell
Loa 11,73 m ; Lwl 10,75 m ; B 3,75 m ; Draft 2,65 m ; Light weight : 5560 kg ; Ballast : 1930 kg
-250 -200 -150 -100 -50 0 50 100 150 200 250
-300
-250
-200
-150
-100
-50
0
50
100
150
200
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-200
-100
0
100
200
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-300
-200
-100
0
100
200
-250 -200 -150 -100 -50 0 50 100 150 200 250
-300
-250
-200
-150
-100
-50
0
50
100
150
200
Sailplan :
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
-400
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
For Gene-VPP : SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m)88,81 7,85 1,30 18,47 52,92 125,61 9,07
Gene-VPP input data for Syd 38 with a loading of 450 kg (crew sit windward) :
>>> Output :
For Gene-VPP, hull body data with loading and at equilibrium upright (put Heel = 0°)Lwl (m) Bwl (m) Tc (m) Bmax (m) Cp hull LCB hull(%) Sf (m2) SA (m2) ZCE (m) Zdeck (m) Zmast (m) Main (m2) Spi (m2) ZCE spi (m) Reefing10,96 2,97 0,44 3,75 0,55 45,45 22,03 88,81 7,85 1,30 18,47 52,92 125,61 9,07 1,00
Keel wing Keel bulb (if no bulb, put Vol. = 0 and Sw = 0 ) Rudder Displacement and draft at design load Flat miniVol. (m3) Sw (m2) Chord (m) Vol. (m3) Sw (m2) L (m) D (m) Vol. (m3) Sw (m2) Chord (m) Disp. (kg) Draft (m) 0,60,13171 3,46 1,05 0,08537 1,73 1,60 0,39 0,02319 1,49 0,44 6010 2,67
Righting Moment RM (kN.m) Wetted surface Sw (m2)RM0° RM20° RM30° Sw0° Sw20° Sw30°6,622 35,411 44,102 30,36 28,77 27,79
From the Sailplan sheet :
2 4 6 8 10 12 14 16 18 20 222
3
4
5
6
7
8
9
10
11
12
Gene-VPP : Speed results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t spe
ed (
Kno
ts)
2 4 6 8 10 12 14 16 18 20 220,4
0,5
0,6
0,7
0,8
0,9
1
1,1
Gene-VPP : Flat optimum when upwind
Wind (Knots)
Fla
t
2 4 6 8 10 12 14 16 18 20 220
5
10
15
20
25
30
35
Gene-VPP : Heel results
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Wind (Knots)
Boa
t hee
l (°)
0 5 10 15 20 25 30 350
5
10
15
20
25
30
35
40
45
50
Gene-VPP : Righting Moment RM versus heel angle
Black points : RM input values ; Blue : RM programmed functionRed points : SA-VPP output when upwind
Heel (°)
RM
(kN
.m)
3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,5 10,0 10,5 11,0 11,50,00,51,0
1,52,02,53,03,5
4,04,55,05,56,06,5
Gene-VPP : Drag versus boat speed
Red : Upwind ; Blue : reaching twa 90° ; Green : downwind with spi twa 135°
Boat speed (Knots)
Dra
g (k
N)
