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Davits - Excess 14

Dear Hervé, 
We are really getting excited to see Hull No 1 soon!
There is one thing that I have been always wondering about because of the poor solution in various catamarans. The Davits. 
It should be relatively easy to have a construction where the hull of  the Dinghy has 4 good touch points at the Davits and is therefore stable without moving around or the need for additional lines. Also should the Davits already be done in a way that Solar panels can be installed without much hassle. 
Hope that our new XCS 14 will surprise us positively. 
Best,
Michael

14 comments
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R
Roberto
June 12, 2022
Ciao everybody,
Good topic. Carbon Davits are nice, light, strong, sporty looking. Don’t like SS one.
Dinghy: which will be the maximum size and weight in the 14? Of course big dingy are comfortable, sea worthy, fast but 250kg on the back will increase pitching. Waiting for your answers.
Roberto
D
Dusserre
June 11, 2022
1 answer
Bonjour,
Le "must" pour les avoir utilisés, ce sont les bossoirs composites petitjean, couplés à un winch bien dimensionné et à un circuit d'écoutes "fluide". Facile à utiliser, l'annexe bien horizontale, 4 points de contacts avec n'importe quels types d'annexes, semi rigide ou rigide ...facile pour l'adaptation des panneaux, bref, un vrai bonheur dont le seul défaut est le tarif.
R
Ruppmic
June 12, 2022
Bonjour Dusserre,
exactly that was what I have been thinking about. Sleek, beautiful, strong and super functional.

Herve,
can this be used on the XCS 14?

Michael
S
Stephen.H
June 10, 2022
Definitely agree with this thread. Davits are usually designed without much thought to how the dinghy will be secured, rub points etc so you see lots of improvised solutions with additional foam buffers, tack-on solar panels etc. As a result davits are usually the ugliest part of any catamaran - and they are generally right in the way of the view off the back of the boat at anchor. It would be great if there was a simple, lightweight swing down solution that also had the option of an integrated (nicely designed) S / M / L factory solar array. Something you could drop down to pick up a tender and even keep out of sight while at anchor.
Herve
Herve
June 10, 2022
2 answers
Cher Michael,

Je suis impatient aussi de vous faire découvrir l'Excess 14 !

Merci beaucoup pour cette proposition de sujet très intéressante, je pense que cela pourrait mériter un article/questionnaire complet sur le Lab !

En effet, les bossoirs sont des éléments qui ne sont pas si simples, c'est pourquoi on trouve tant de solutions sur le marché... (aucune d'entre elles n'étant parfaite à 100% !).

Vous soulignez deux caractéristiques qui peuvent effectivement être précieuses : la bonne tenue de l’annexe sans cordages supplémentaires, et le support des panneaux solaires.

Mais, il y a beaucoup d'autres fonctions que l'on peut prendre en compte dans la conception bossoirs : bien sûr, la résistance et la rigidité, mais aussi la capacité de charge, le design, le poids, la facilité de manœuvre, le faible impact visuel, le coût, la compatibilité avec divers modèles d'annexes, l'intégration dans la géométrie du bateau, etc...

A partir de cette liste, on devine rapidement que certains critères sont contradictoires, c'est pourquoi on trouve tant de solutions sur le marché. Du simple tronçon de bôme en alu encastré, aux systèmes les plus complexes de type Tenderlift...

Chaque solution répond plus ou moins aux différentes attentes, en essayant de cocher le plus de cases possibles.

Sur la gamme Excess, nous utilisons traditionnellement des bossoirs classiques en inox, très pratiques, rigides, et assez faciles à personnaliser.

Sur l'Excess 14, en revanche, nous avons choisi de mettre l'accent sur le design et le poids, et nous avons donc créé de nouveaux bossoirs en composite.

Notre objectif est d'obtenir la même capacité de charge que les bossoirs en acier, avec un design plus léger et plus intégré. Malheureusement, les deux critères que vous suggérez ne seront pas mieux pris en compte qu'auparavant...

J'espère que votre Excess 14 vous surprendra quand même positivement !

Je suis impatient de vous donner plus de détails à bord, et je vais sérieusement envisager d'ouvrir un questionnaire dédié aux bossoirs sur l'Excess Lab !

Merci encore pour ces contributions constructives.

Bien à vous,

Hervé
E
Enjoy catamaran
June 18, 2022
Bonjour à tous, qui peut le plus peut le moins... l’idée est pour nous d’avoir des bossoirs les plus légers / discrets et acceptant le plus de poids possible (dans l’idéal) et après c’est chacun qui choisit quel poids de dinghy il veut pendre à l’arrière de son multicoque. Nous nous sommes plongeurs et une annexe semi rigide de 380 avec 25cv c’est parfait pour aller plonger à 4 équipés. Un système de relevage simple, au winch (électrique ou pas (avec un e wincher ça le fait bien ????!)) fluide et qui maintient l’annexe à l’horizontale (pour qu’elle puisse se vider lors des pluies tropicales...) c’est parfait !
E
Enjoy catamaran
June 30, 2022
Quel est le poids (/taille) maxi supportable par ces bossoirs ? on peut y accrocher notre highfield 380 + 25cv qui doivent peser dans les 250 kgs ? ????merci Hervé
Herve
Herve
June 10, 2022
1 answer
Dear Michael,

I am looking forward to have you discover the Excess 14 too !
Thanks a lot for this very interesting input, I think this subject may deserve a full Lab article/survey !

Indeed, davits are items which are not that simple, this is why you find so many solutions on the market… (none of them being 100% perfect !)
You point out two features that can indeed be valuable : proper holding of the dinghy without additional ropes, and solar panels support.
But, they are many more design features one can expect from davits : Of course strength and stiffness, but also holding capacity, design, weight, ease of manoeuver, low visibility impact, cost, compatibility with various dinghy models, integration within the boat’s geometry, etc…
From this list we quickly guess that some features are contradictory, this is why you find so many solutions on the market, from simple alloy boom sections hanging over, to the most complex Tenderlift-type systems…
Every solution addresses more or less the various expected features, trying to tick as many boxes as possible.

On the Excess range, we traditionally use classic stainless steel davits, very convenient, stiff, and quite easy to customise.
On the Excess 14 instead, we made the choice to put more focus on design and weight, so we created new -composite made- davits.
We target to have the same holding capacity as the SS ones, with lighter and more integrated design. Unfortunately the 2 features you point out will not be addressed better than before…

I hope that your Excess 14 will surprise you positively anyway !
I am looking forward to giving you more details onboard, and I will strongly consider opening a dedicated ‘davits’ survey on the Excess Lab !

Thank again for these constructive inputs.
Best regards,
Hervé
F
Franciscoxpl@gmail.com
June 13, 2022
Wouldn't that be a good moment to develop a secure composite platform for the tender? It is convenient, aesthetic and if well executed, safe. Could be raised by one of the electric winches.
M
MarkPNW
June 10, 2022
4 answers
100% agree with Michael that Davits need innovation. While I haven't used them, the style that Chris White uses (and Leopard) adopted, that swings the tender out past the sterns is intriguing. There is also the problem that while there has been a lot of innovation in catamarans, there hasn't been in tenders. With the cut outs on the inside of the hulls there should be a way to store a large tender that is better at longer journeys and can take rougher conditions. The swing out davit would support this.
R
Ruppmic
June 10, 2022
How would you make this work with solar panels installed on top of the Dinghy? Also the Dinghy hangs high and blocks the view. Not an ideal solution in my opinion. M
M
MarkPNW
June 10, 2022
You put the solar panels on an extension of the cockpit roof, also reduces shadows when the sun is front of the boat. You can hang the dinghy as high or low as you want, too low and it gets hit by waves passing under the bridgedeck, too high and it reduces the view. Yes, some tweaks to the design would be required to hold the dinghy firm as Michael was looking for in his comment. A solvable problem. e.g. height adjustable foldable arms for the dinghy to be lifted against (non load bearing).
R
Ruppmic
June 10, 2022
The solution that Outremer has applied in it’s 55 is what could be worth while looking at.
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robd
July 4, 2022
I just sailed on a Chris White Atlantic 55 and did not like the davits.