ADP 52

Dolce Vita 52' Open sea cruising, high tech

architect : Groupe Finot
construction : Tresco

a world from the architect

In the last around the world races, the evolution of craftmanship of the boats and the evolution of materials (in particular carbon masts, water ballasts ..) lead us to design a new generation of boats, simpler,spacier, with less fitting and less useless items. These boats, compared to those of the previous generation, see their speed increased by 10 to 20%.

With low heeling, easier handling, they are more stable, more solid, thus much safer. Their CWing© mast, watertight in the aft part and their deep keel make them self-righting.

At the same time, navigators are looking for sailing pleasure : these boats, simple and easy to maintain, give their life aboard easier and increase their time spent at sea.


in this spirit the ADP 50 was designed :
to go fast with a stable, solid, easy boat
with low heel

She is a fast offshore cruising boat. We designed her as we would have done for our personal use in family cruising.

This 50' is designed implementing all the advanced technologies of the moment ( prepeg carbon hull, mast, keel, carbon boom, nomex honey comb fittings) and her design is based on our experiences on offshore racing boats, specially the open boats, out of rating, out of prejudice, to carry out an easy, safe and practical boat.

Handling systems are particularly studied not to get tired.
A well-balanced hull, rather thin forward, gives a good speed in all angles.
ADP 50 is 15 to 30 % faster than an equivalent cruising boat.
She is a light boat, easy to control.
The water ballast allows to vary the weight : lightness while reaching, smooth movements in the breeze.
The deck is very clear, very Mediterranean.
There is a comfortable aft cabin for crew life. 3 cabins and 3 toilets provide the intimacy in the bow.


Sailing the boat

The boat is stable. This stability is obtained by the wide hull shape, a deep keel and the water ballast.

This stability makes the boat very safe, the number of manoeuvres is reduced, the boat sails only slightly heeled and the handling is safer.

The relatively symmetric hull shape is studied to have a good stability under sail. This balance under heel gives the boat the capability to follow a straight course , even under auto-pilot.
Everything is done so that the boat has a light weight. It provides speed and easier handling.

The lifting keel is optional. The draft of 3,20m is reduced to 1,70m with one hydraulic jack for lifting and two jacks for securing.

The rigging is a CWING © rigging, i.e. a carbon wing mast held by two shrouds and one forestay. The mast is built in two parts, the forward part for halyards and the aft part for watertightness.

The lightness is obtained by: ∑

  • A carefull prepeg construction , sandwich in the upper parts and the deck, monolithic in the bottom ∑
  • A carbon mast ∑
  • A mixed laminate / lead ballast with a carbon laminated fin cooked in autoclave and a lead bulb ∑
  • A good organization of the construction ∑

    But especially, by keeping on the boat only what is important.

The architect has always in mind this sobriety, this search for essential. It is at this price only that we obtain an easy boat to sail, to manage, to maintain.

Image Pierre Forgia/Finot


The deck

Four sails:

  • a full batten main sail,
  • a jib on furling system,
  • an asymmetric spinnaker on boowsprit,
  • a gennaker on furler

Sailing operations can be executed from the cockpit. Halyards, reefs, spinnaker sheets are all brought back to the companionway, within reach. The main sail and jib sheets are in the aft of the cockpit or in the companionway.
An automatic Magic Trim tacking system for the main sail and the jib is optional :

The boat has two steering wheels. The cockpit sets wider to give comfortable area for the helmsman. You sit on the corming, you rest your feet comfortably on the flange at the bottom of the cockpit. Seats and back seats can be attached to the corming.

The cockpit is wide with a double central removable table. The skirt is easily accessible. Crew members can stay in the cockpit, in the aft or in the companionway, the invited guests can stay in the cockpit or lie on the gangways, the bow area or the skirt.

The skirt provide space for a semi-rigid dinghy, that one can launch with the boom, the dinghy is protected by a rocking lid . A bath ladder can serve as a gangway, it is hidden under the aft beam.






The common sails manúuvres are located at the aft.
Reefing is located above the companionway.
The presented solution consists of :
- 3 electric winches in the back
- 1 to 3 electric winches in the companionway

This system can be optimized :

  • The main sail with 2 Magic Tream jacks
  • The genoa with self contained winches so that sails are not handled physically but through a button or a Magic Trim.

The jib is on an electric or hydraulic furling system.
We also suggest to have completely automatic reefing system on hydraulic jack inside the mast. For safety reasons, it can be manually overriden.


The hull and the deck are built out of monolitic carbon and Nomex sandwich . They are reinforced by longitudinale stringers and transversal frames and bulkheads.

Image Pierre Forgia/Finot

There are two rudders.

The keel fin is built out of laminated carbon cooked in autoclave. The lead bulb is directly fixed between 2 frames and 2 keelsons.

The boat was conceived to be simple to build, simple to maintain.

The whole equipment of the boat is grouped under the central storage unit

  • - Engine
  • - Pumps ( water ballast, bilge pump,running water)
  • - Hydrolic power source. The storage case rocks back to give easy access.

The circuits, (cold water, warm water, diesel oil) have their defined places, and can be easly visited in a channel which runs from bow to aft.
In the same way, the majority of the electric wiring runs just under the deck, and the control panel is located in the ceiling over the chart table.

In this way all the equipment is easily controlled, quickly disconnected and interchangeable.



There are large, simple volumes. ∑

  • A peak at the bow ∑
  • Two or three cabins ∑
  • A crew cabin, a kitchen, a navigator corner. ∑

We propose two fittings plans for the bow cabin



15,70 m
  sail area     water 600 l
4,72 m
  GV 115 m2   or water 250 l with desalinisator
3,20 ou 1,70/3,20 m
  Génoa 52 m2   Fuel 250 l
8 t
  assymmetric spi 170 m2   Engine 76 CV Volvo
3,3 t
        dinghy 3,10 m 8 CV
water ballast
1,7 t


Groupe Finot
1 rue Pierre Vaudenay
78350 Jouy en Josas France
tel 33 (0)1 39 46 20 02
fax 33 (0)1 39 46 20 02

Tresco Composites
rue du Moulin de la Groie
ZI de St Médard des prés
85200 Fontenay le Comte France
tel 33 (0)2 51 50 00 57
fax 33 (0)2 51 50 00 92


Photos Dolce Vita sailing

May, 2002,some photos of ADP 50 construction

see article in Course au Large april/may/june 2002 by Patrice Carpentier

 Les images très agrandies (, entre 1 et 1,5 Mo) sont à disposition pour toute utilisation journalistique, avec la mention obligatoire.

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