Amphibian 30

1981

Amphibian 30 is a 29′ 9″ / 9.1 m monohull sailboat designed by Nelson Marek starting in 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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Source: sailboatdata.com / CC BY

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