Amphibian 30

1981
Designer
Nelson Marek
Builders
?
Associations
?
# Built
2
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
29 9 / 9.1 m
Waterline Length
24 6 / 7.5 m
Beam
10 2 / 3.1 m
Draft
5 4 / 1.6 m
Displacement
6,500 lb / 2,948 kg
Ballast
2,500 lb / 1,134 kg

Rig and Sails

Type
Sloop
Reported Sail Area
450′² / 41.8 m²
Total Sail Area
449′² / 41.7 m²
Mainsail
Sail Area
202′² / 18.8 m²
P
36 6 / 11.1 m
E
11 1 / 3.4 m
Mast Height
?
Foresail
Sail Area
247′² / 22.9 m²
I
41 11 / 12.8 m
J
11 8 / 3.6 m
Forestay Length
43 7 / 13.3 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
6.63 knots
Sail Area/Displacement
20.67
high performance
Ballast/Displacement
38.46
less stiff, less powerful
Displacement/Length
197.32
light
Comfort Ratio
17.34
lightweight racing boat
Capsize Screening
2.19
better suited for coastal cruising

Notes

Winner in class at the MORC Internationals a number of times. Only 2 built: (‘Cowboy’ & ‘Rabble’.)
Thanks to ‘SPB’ for additional information.

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