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15-foot Gandelow Plans - Information about the contents of this free PDF
CONTENTS
Page 2: Views of the boat in plan, side view, from stem and stern and in 3D.
Page 3: The dimensions of the 15-foot gandelow in a 'Lines Table', sometimes called a 'Table of Offsets'.
Page 4: Diagrams showing the shapes of the planks (strakes) as they would be when cut out and laid flat.
Pages 5 to 13: Widths and top-of-plank dimensions of all nine of the molds / frames used for building a the 15-foot gandelow.
Page 14: Top-of-plank dimensions on the transom and stern post.
Page 15: Dimensions of the parts of the stem and stern post and of the transom.
Page 16: Angles and offsets of the rolling bevel on the first butterfly plank (B1).
Please note that:
- This PDF is intended to be printed out A3 size (US Ledger, 11 x 16.5 inches).
- All the dimensions are in decimal inches. A conversion table to fractions of inches is below.
- The photographs of the frames / molds are taken from the stern of the boat (looking forward) and show their rear face. The frames
should be fixed so they are vertical (at 90 degrees to the Datum line - not at right angle to the slope of the floor).
DISCLAIMER: These plans and dimensions are provided only as a guide. They are intended to be used by experienced boatbuilders
- who will need to scale up the molds / frames to full size using the measurements provided.
© 2017 - Patrick Beautement, Beautement Boats [Version 1-3, draft, updated 24 Apr 2017 - pages 4, 15 corrected. Page 16 added]
Plans with Imperial and Metric measurements and detailed explanations are to be published in
early 2018. They will be sold through the author's website - see www.beautement.com/books.htm.
Abbreviations used: B-1, B-2 = Butterfly planks one and two; CL = Centreline; Gar - Garboard; FP = Front Perpendicular;
HBr = Half-breadth; SPs = Station Positions; ToP = Top of plank; TP = Transom perpendicular; VW = Visible width.
These views of the 15-foot gandelow were generated using the 'Delftship' software and
the dimension data from the 'Lines Table' page of this document.
This model gives a general impression of the shape and appearance of the boat.
© 2017 - Patrick Beautement, Beautement Boats
15-foot Gandelow - Profiles and 3D view
These 'exploded' views of the planks / strakes of the 15-foot gandelow were generated using the
'Delftship' software and the dimension data from the 'Lines Table'.
They show how the model thinks the planks might look after they were cut out and laid flat.
These views give a general impression of the shape and appearance of each plank / strake.
Note for more advanced readers: the black curved lines are the waterlines and 'buttock lines' which,
with the stations, provide a grid system used in fully detailed plans.
15-foot Gandelow - 'Exploded' view of the planks / strakes
© 2017 - Patrick Beautement, Beautement Boats
STEMSTERN
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 25.75"
B2 - 22.88"
B1 - 19.25"
Gar 15.63"
Floor 11.5"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
8.8
8"
5.5
0"B1
- 9
.88"
B2
- 1
4.4
4
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 1
68
© 2017 - Patrick Beautement, Beautement Boats
Top of Floor
76 degrees
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 41.13"
B2 - 37.13"
B1 - 33.00"
Gar 28.75"
Floor 23.88"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
8.3
1"
Ga
r 5.3
8"
B1
- 9
.63"
B2
- 1
4.0
0"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 2 - Mold Dimensions
65
© 2017 - Patrick Beautement, Beautement Boats
Top of Floor
73
Centreline
15' Gandelow Frames
At 1" = 4"NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 50.13"
B2 - 46.00"
B1 - 41.13"
Gar 35.75"
Floor 31.38"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
7.6
9"
Ga
r 5
.31"
B1
- 9
.38"
B2
- 1
3.5
6"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 3 - Mold Dimensions
57
© 2017 - Patrick Beautement, Beautement Boats
68
Top of Floor
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 54.13"
B2 - 49.00"
B1 - 43.63"
Gar 37.88"
Floor 33.25"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
6.9
4"
Ga
r 4.9
4"
B1
- 8
.94"
B2
- 1
2.9
4"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 4 - Mold Dimensions
54
© 2017 - Patrick Beautement, Beautement Boats
65
Top of Floor
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 54.38"
B2 - 49.13"
B1 - 43.63"
Gar 37.63"
Floor 33.38"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
6.5
6"
Ga
r 4
.75"
B1
- 8
.63
"
B2
- 1
2.6
3"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 5 - Mold Dimensions
54
© 2017 - Patrick Beautement, Beautement Boats
Top of Floor
64
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 52.13"
B2 - 47.06"
B1 - 41.50"
Gar 35.88"
Floor 32.38"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
6.3
8"
Ga
r 4
.31"
B1
- 8
.31"
B2
- 1
2.3
8"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 6 - Mold Dimensions
© 2017 - Patrick Beautement, Beautement Boats
Top of Floor 55
65
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 48.00"
B2 - 43.00"
B1 - 37.44"
Gar 32.13"
Floor 29.25"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
6.2
5"
Ga
r 4.2
5"
B1
- 8
.19"
B2
- 1
2.1
3"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 7 - Mold Dimensions
63
© 2017 - Patrick Beautement, Beautement Boats
Top of Floor
67
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 42.13"
B2 - 37.25"
B1 - 30.88"
Gar 24.88"
Floor 21.50"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
6.2
5"
Ga
r 4.8
1"
B1
- 8
.50"
B2
- 1
2.0
0"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 8 - Mold Dimensions
68
© 2017 - Patrick Beautement, Beautement Boats
Top of Floor
66
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
Width of Mold at Top of Planks (inner edge of plank / outer edge of floor)
Sheer 35.25"
B2 - 29.75"
B1 - 21.75"
Gar 14.50"
Floor 10.00"
Screwed to front of Saddle
He
igh
t o
f T
op
of P
lan
ks a
bo
ve
To
p o
f F
loo
r a
t C
en
tre
line
Sh
ee
r 1
6.5
0"
Ga
r 6
.44"
B1
- 9
.56"
B2
- 1
2.2
5"
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
Station 9 - Mold Dimensions
69
© 2017 - Patrick Beautement, Beautement Boats
Top of Floor
63
Centreline
15' Gandelow Frames
At 1" = 4"
NOTE: Rear side of
Frame / Mold is shown
0 5 10 15 20 25 30 35 40 45 50 55 60cm
0 3 96 12Inches 15 18 21 24
© 2017 - Patrick Beautement, Beautement Boats
Widths at Top of Planks (inner edge of plank)
Sheer 24.88"
B2 - 21.63"
B1 - 12.88"
He
igh
t o
f T
op
of P
lan
ks v
ert
ica
lly a
bo
ve
Ce
ntr
elin
e o
f D
AT
UM
lin
e
Sh
ee
r 2
2.6
3"
Ga
r 1
3.6
3"
(in
clu
din
g
the
go
rin
g)
B1
- 1
5.6
9"
B2
- 1
7.7
5
Transom
Centreline
Stern
Post
3.5" For details of transom
dimensions and bevel angles
see next page
DATUM line
15' Gandelow At 1" = 4"NOTE: The face shown is the
sloping front of the transom.
To
p o
f ste
rn p
ost 2
5.1
3"
15-foot Gandelow -
Templates for stem, stern and transom.
Gandelow Plans at 1" = 2"
© 2017 - Patrick Beautement, Beautement Boats
Section through transom
Plank end
Plank end
0.44"
0.44"
Rabbet Line
Back Rabbet Line 13" glued
join
49°
4.19"
5.13"
2.88"
3.88"
51°
54°
135°
1.81"
2.13"
11.63"
26.5"
1.75"
1.25"
1.13"
1"
Remove after
assembling55°
1.63"
Stern post
sections
Stern Post
62°
1.5"
0.5"
1.63"
Stem post
half sections
Pla
nk e
nd
Pla
nk
end
Rope hole
Rabbet Line
Cut off w
ast
e a
fter
ass
em
bly
1.25"
Sheer
line
2.1
3"
4.1
3"
4.1
3" 4.1
3" 4
.31"
Cutwater
Apron (rear) of Stem Post
72.00" radius to front
of stem post
45/16 " (1
0.9
cm
)
1.75"
42°
4.0
0"
Back Rabbet Line (glued join)
1.44"
1.31"1.31"
0.44"
1.25"
0.5"
0.5"
1.63"
0.75"
+
1.63" radius Stem Post
36.00" radius to front
of Stem post
42°56°
Inches
cm
0 1 2 3 4 5 6 7 8 9 10 11 12
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Inch
es
cm
01
23
45
67
89
10
11
12
Centreline
1.25"
25.00" radius to
top curvesA'
A
Section
Section
Transom
Forward face
(port half)
Top edge of rear face
Top edge of front face
Standing bevel
Rear edge of u
ndercut rollin
g bevel
Fro
nt
Rear
Front face
Rear
Fro
nt fa
ce
Rear fa
ce
Fro
nt fa
ce
Re
ar
A to A' = 13.88"
A to B = 11.13"
A to C = 10.25"
A to D = 5.5"
A to E = 4.75"
1"
1"
B
C
ED
13
.75"
49°
64°
55°
135°
12.63"
10.81"
11.25"
12.44"
5.8
8"
5.7
5"
11.00"
10.88"S
ect
ion
Sectio
n
48º
01
23
45
67
89
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Fro
nt
Rear
Sectio
n
44º