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Trimaran 39 Objectif Rhum (cruise race)


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39-foot offshore cruising trimaran project

This harmonious design by Philippe RIVIERE (Philippe RIVIERE / Yacht Designer | ARCHITECTE NAVAL http://www.philipperiviere.com/wp/) of classic design (without giving way to reverse bows), offers two double berths - including the one at the rear located at the waterline which should turn out to be very pleasant at sea -, a shower room wc, a chart table corner, a small "L" seat (which can be used as extra sleeping) with its table for meals and a long kitchen facing it. All the fittings benefit from a beautiful height under the beam and a sufficient height above the berths to be able to sit.
Storage should not be outdone given the volumes still available.

Outside, this trimaran is distinguished by its large cockpit which extends along the rear arm with two deported and protected helm stations. Two watch stations are located in front of the descent, which are sheltered by a large hood.
Particular care has been taken to facilitate access and safety on the deck by gangways placed on each side of the deckhouse which turns out to be very slightly domed and slightly raised.

On the power side, the trimaran has an upwind surface of around 85 m² for a mast of 15.40 meters. The mast height and the sail area are reasonable, but they could be increased according to the wishes of the future owner. .

This sorting is provided with bulky floats. The design, with slightly V-shaped bottoms, should encourage a more comfortable passage in the rough sea and above all should be more tolerant in the event of overselling.
The foils remain optional ...

This trimaran can be built in foam or strip planking

LENGTH: 11.90 M.
WIDTH: 10 M.
WEIGHT: 3000 KG
TRAVEL: 4000 KG
WING MAT: 15.40 M.
SAILS AREA: 83 M2

MOTORIZATION: inboard 30 cv

Could be suitable for a Route du rhum.

 

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  • 3 weeks later...

Some modifications.
The mast has been moved back, the daggerboard is located in front of the mast.
With a mast retracted, the presence of the bowsprit is less useful or necessary.
the dinghy finds its place at the rear of the cockpit beam.
It should also be noted that the buoyancy volume has been increased on the rear of the central hull

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I am a French guy. I don't always understand English perfectly.
What do you mean ? Why is this trimaran so short?
The first question to ask for a new boat is: what size of sail I am able to maneuver. For me, I am not very young, a hundred square meters alone ...
40 feet is also the minimum to face a little rough sea on a multihull.
It is also the minimum size that provides sufficient comfort for a couple.
Finally, a moderately sized trimaran limits the cost.

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15 minutes ago, Histoires sous le vent said:

I am a French guy. I don't always understand English perfectly.
What do you mean ? Why is this trimaran so short?
The first question to ask for a new boat is: what size of sail I am able to maneuver. For me, I am not very young, a hundred square meters alone ...
40 feet is also the minimum to face a little rough sea on a multihull.
It is also the minimum size that provides sufficient comfort for a couple.
Finally, a moderately sized trimaran limits the cost.

i think he was talking about the mast length.

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20 minutes ago, Histoires sous le vent said:

I am a French guy. I don't always understand English perfectly.
What do you mean ? Why is this trimaran so short?
The first question to ask for a new boat is: what size of sail I am able to maneuver. For me, I am not very young, a hundred square meters alone ...
40 feet is also the minimum to face a little rough sea on a multihull.
It is also the minimum size that provides sufficient comfort for a couple.
Finally, a moderately sized trimaran limits the cost.

Sans accents:

PILL66  a demande: Pourquoi est le greement si petit?

Et vous avez donnee  une bonne reponse...... Pas le plus performant, mais le plus practique/maniable pour vous.

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1 hour ago, Sidecar said:

Sans accents:

PILL66  a demande: Pourquoi est le greement si petit?

Et vous avez donnee  une bonne reponse...... Pas le plus performant, mais le plus practique/maniable pour vous.

of course the mast size can be increased to obtain more surface area, if desired.

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18 minutes ago, triple jim said:

Nice looking too..

image.png.05cad6c86f3f91ddef0620f93b23ff36.png

I see some Newick influence there.

Re: short mast.  I did a lot of sailing on two different Vals in the 80s and early 90s.  I really appreciated the short mast when the wind piped up.  And they were both light enough to still do pretty well in light winds.  But, honestly, I hate light wind sailing anyway.  So I like a short stick to keep the weight aloft down.  Having a bunch of stick waving around up there above a reefed sail seems a bit dicey.

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  • 1 month later...
1 hour ago, Histoires sous le vent said:

COURBE STAB OR39.jpg

Is this a peak in the stability curve at 17.8 degrees of heel?

At that point (when the main hull flies?), maximum righting moment (RM) is reached: 17,385 Kg/M ?

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This boat is way similar in spec to the tri I have been enjoying for thirty years - what Formula 40 should have been.

I really hope this comes to fruition before marina dwellers and older folk f it up - Good Luck and stay true to the concept.

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