Dimensions

Length of yacht

14.86

m

Width of yacht

7.5

m

Height of hull

2.73

m

A: Hull footprint area (1 hull):

12.93

m²

Calculate draft from given weight:

Weight of yacht (calc below):

11019

kg =

11.02

t

W = V * rho * g

W = A*draft * rho * g

rho*g salt water:

1.025

kg/m³

draft = W/(A*rho*g) =

0.42

m

Rough cost estimate:

Cost of Epoxy in Thailand:

1000 Liter of Epoxy:

170000

THB =

5392

$

1 $ in THB:

31.53

Density Liquid Resin

1175

kg/m³

Density Mixed & Cured Epoxy Solid

1150

kg/m³

Shrinkage

97.87%

Cost factor epoxy due to shrinkage

1.02173913

Volume Epoxy for Max weight of yacht:

9.58140

m³

Cost for weight of yacht in epoxy:

53000

$

Battery pack

50000

$

PV cells

2000

$

Marine motor 20kW, electric

20000

$

Interiour, kitchen etc

20000

$

Aluminium profiles for frame of cabin

10000

$

Renting of place to build

5000

$

Paint

5000

$

Windows

5000

$

Sum

170000

$ (DIY)

Weight estimate

Side area of hull

40.58

m²

Thickness hull wall, 1 layer

5

mm

Epoxy volume of 1 hull

0.8117

m³

Weight epoxy of 1 hull

933

kg

Weight epoxy of 2 hulls

1867

kg

Horizontal area cabin

111.45

m²

Volume epoxy 1 horizontal cabin wall

0.55725

m³

Weight epoxy 1 horizontal cabin wall

641

kg

Weight 4 horizontal cabin walls

2563

kg

Weight water tank 1000 liters

1000

kg

Weight electric motor and power electronics

150

kg

Battery pack LFP

capacity

200

kWh

weight

1250

kg

Solar panels

Weight of glass-glass solar panel

13

kg/m²

Solar panels roof area without wings

60

m²

Solar panels area 1 side

13.04

m²

Weight all solar panels

950

kg

Windows

Area front-side window, 1 side

2.8

m²

Area front window, 1 side

1.26

m²

Area rear window, 1 side

5.13

m²

Area all windows

18.38

m²

Weight all windows, same w/m² as PV

239

kg

Furniture

Kitchen

1000

kg

Bathroom

500

kg

Bedroom

500

kg

Living room

1000

kg

Power

Efficiency PV panels

220

W/m²

Peak power

5738

W

Per day, 5 hours

29

kWh

Fender

Along the hull, at the top, a 5x5cm wooden liner, outside of the hull, bolted to the hull.

Stainless steel railing bolted through the wooden liner to minimize openings and connections points through the hull.

Wind calculation

Wind speed: 50 knots ≈

25.75

m/s

F = 0.5 * rho_air * V^2 * C_D * A

Element C_D (approx) Flat plate (normal to wind)

1.3

Air density (standard sea-level)

ρ=

1.225

kg/m³

At 40 kn:

p =

527.96

N/m²

2 wings

Cabin

Hull

Area [m²]

24.287

21.366

28.4017

Distance center to water line [m]

4.24

2.66

0.956

Moment [kNm]

54.37

30.01

14.34

Sum moment

98.71

kNm

Distance hulls, center-center

6.225

m

Force pushing 1 hull down:

15.857

kN = 1000 kg*m/s²

Weight pushing 1 hull down:

1.616

t

Draft from wind force:

0.061

m =

6.10

cm

Max draft:

1.61

m =

161.00

cm

-> Huge safety margin against capsizing