Aquinus c57 Sandwich Fiberglass Cruising catamaran

DUDLEY DIX YACHT DESIGN

Aquinus c57

Sandwich fiberglass cruising catamaran

DH550, basis for Acquinus c57 design

Composite Fast Cruiser

~ Large cruising catamaran

~ Foam sandwich fiberglass construction

~ All the space for family comforts

~ Great boat for charter or long distance cruising

~ Cruising keel or daggerboard options

~ Composite sister developed from DH550

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For more information about the origins and characteristics of this design, visit the DH550 design page.

This design was commissioned by a composite builder in Europe, who has various moulds completed. His backer for the project withdrew for financial reasons, leaving the project incomplete. If interested in picking up where he left off with the current builder, please contact Dudley by email to be connected with the builder.

The composite build is more complex than the plywood build, requires more specialized skills and it will cost more to build the main structure. If you don't have the skills available to build the composite version then please opt for the plywood DH550.

An alternative option for those who want to build this composite version is to purchase components from the builder for owner completion. They can be supplied in three major parts for one day assembly into the complete hull and deck structure.

57ft catamaran components
Acquinus c57 components for owner assembly"

55ft catamaran
DH550 Hull #1, "Wild Vanilla"

57ft Catamaran sail plan
Acquinus c57 Sail Plan

The main differences between this design and the DH550 are:-

~ The stern has been extended aft of the aft beam.

~ The sheer detail has been modified using a narrow raised sheer panel and modified deck camber.

~ Construction materials are foam sandwich with options of glass or carbon laminates, with Kevlar tape reinfocements at daggerboard casings and carbon composite shroud chainplates.

57ft catamaran section
Acquinus c57 section
Left shows cruising keels, right shows with daggerboards

The DH550 has proven itself as a speedy and capable ocean cruiser, with multiple crossings of the Atlantic and Pacific. One of those crossings involved attacks from a pod of orcas when approaching Gibralter. They broke both sheer pins that attached the steering tillers to the rudder shafts, without inflicting structural damage to hulls nor rudders.

57ft Cat accommodation
Acquinus c57 accommodation layout

57ft Cat deck plan
Acquinus c57 deck plan

Acquinus c57 cross-section

List of drawings

CHARACTERISTICS

LOA 17.39m [57' 1"]

LWL 15.70m [51' 6"]

Beam overall
8.70m [28' 7"]

Hull beam
2.00m [6' 7"]

Draft 0.75/2.19m [2' 6"/7' 2"] (boards)
1m [3' 4"] (cruising keels)

Displ half load 12500kg [27550lb]

Main + Jib
133.5sq.m [1437sq.ft]

Powering
2 x 50hp diesel

I = 17.84m [58' 6"]

J = 5.96m [19' 6"]

P = 18.40m [60' 3"]

E = 6.10m [20' 0"]

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This page was updated 21 November 2024 2024