Porpoise (Garden)

1971
Designer
William Garden
Builder
various
Associations
?
# Built
?
Hull
Monohull
Keel
Long
Rudder
?
Construction
Wood/FG/other

Dimensions

Length Overall
41 11 / 12.8 m
Waterline Length
30 3 / 9.2 m
Beam
12 11 / 4 m
Draft
5 8 / 1.7 m
Displacement
34,000 lb / 15,422 kg
Ballast
9,700 lb / 4,400 kg

Rig and Sails

Type
Ketch
Reported Sail Area
950′² / 88.3 m²
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Mast Height
?
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
Mercedes-Benz
Model
OM636
HP
34
Fuel Type
Diesel
Fuel Capacity
200 gal / 757 l

Accomodations

Water Capacity
200 gal / 757 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
7.38 knots
Sail Area/Displacement
14.48
under powered
Ballast/Displacement
28.53
less stiff, less powerful
Displacement/Length
544.02
ultraheavy
Comfort Ratio
50.62
extremely heavy bluewater boat
Capsize Screening
1.61
better suited for ocean passages

Notes

Garden design #571.
Original plans for wood contruction and many built by professionals and amateurs around the world.
A number of GRP production yachts, especially built in the Far East, were based on this design, to which, according to the designer many “additions and refinements have been made to develop her into a most able and complete vessel”.

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