40class boats

This 40class is a very special one. It was built and designed as a project by the students of Ismans, an engineering school specialized in materials and advanced mechanics. The first drawings were made by Olivier Gouard, a NA that had studied in the school. The project was directed by François Angoulvant, teacher at the school and a skipper. He raced the boat in the Route du Rhum.

http://ismans.univ-lemans.fr/
http://www.sabrosa.fr/fiche_bateau.php?id=3

 

Some videos with 40class boats;

http://www.youtube.com/watch?v=-Z8OdwV-o5Y

http://www.youtube.com/watch?v=nqhE_6NVYdQ

http://www.youtube.com/watch?v=704sPpU8DGE

http://www.youtube.com/watch?v=FHQjFn8BNSA

http://www.youtube.com/watch?v=68oEmvHdpBQ&mode=related&search=

 

Hi

The Express 40 is my project so any questions feel free to ask!
I raced my Open 50 in the TJV 2005 (France-Brazil) and wanted a competitive Class 40 for the next big race, only option was a custom build or a Pogo - with an 18 month waiting list. Found out everyone I knew was interested in much the same thing so I started the Express 40 project having Owen Clarke modify their existing Class 40 with a bigger coach roof (for more protection under a cuddy), transom hung rudders, a re-engineered laminate spec by SP, and a different deck and interior arrangement. We are infusing almost all of the boat. Should build 10-12 boats this year.
We have moved to West Cowes to a bigger shed and the first boat is out of the mould with the 2nd just starting lay up. Lots of pics in the Gallery www.express40.com/coppermine/index.php

Cheers !

Paul
www.express40.com

 

Polarity Paul! You blast from the past! Sounds like someone stopped logging into BoatDesign.net long enough to go sailing!

Pretty different from the Brewer design you were talking about in the early days of this forum.

So you left Spain (just when everyone else is going there)?

 

Congratulations, it looks great.

Paulo

 

Hey Stephen, ..well it is nice to be recognised! After I bought that Open 50 I was lost to light, fast, uncomfortable solo boats...

Pretty typical about Spain, I lived in Barcelona for 6 years and not a word about solo sailing/racing. I leave, and 2 months later Ellen Macarthur moves into to the office upstairs.

Thanks Paulo, its a really interesting project and the Class is great, such a massive amount of interest. It has taken off already in France but we are seeing huge interest from the UK, Norway, Holland and even the USA.

Incidentaly talking about the RCD that was mentioned - we are going through it being just over 12m is expensive. Though we could duck it as a race boat, for our customers having it means easier resale, insurance and we can even get it financed. It's interesting challenge to combine it with being CAT 0 as well!

Cheers !

Paul

 

If only my 40 footer were heavier, shallower, and wider. Sigh. And we were going openish 40ish 50ish 60ish when we designed her. What a difference a few years makes.

Paul

 

Would you mind sharing with us the STIX calculations and the load conditions and correpondent stability curves used to that end? I'd very much appreciate that.
Cheers.

 

"Matondo-Congo" (La Route de l'Equateur), it's a race only for 40class boats. It begins in Marseille and goes to Congo.
Last day the four boats that are leading the race made more than 300 NM in 24h.

http://www.matondo-congo.com/course/parcours.php

 

...and on this race it is not a Pogo that leads (most of them are Pogos), but a Jumbo 40, the boat designed by Pierre Roland (post17).

 

3 diferent class40 on the first three places.

First, way ahead, is a Jumbo, second a Pogo and third an Akilaria. The last one is going faster than anybody and is catching the Pogo. Most of the boats on that race are Pogos.

http://www.matondo-congo.com/

 

Well, the first 5 have already finished and this time the first one was not a Pogo. The first Pogo arrived only in 3rd place.

1st- Philippe Fiston– Jumbo 40 (Pierre Roland)
2nd- Florence Arthaud – Akilaria 40 (Marc Lombard)
3rd- Arnaud Aubry – Pogo 40 (Finot)
4 and 5th Pogo 40.

 

Take a look at this new one, by Guy Ribadeu.

I find it beautiful and it is an aluminium boat. You have on this class wooden boats, fiberglass boats and now also aluminium boats...

 

Another race, another winner and a brand new 40 class boat on the second position.

First boat to arrive was Apart-City, a wooden boat with chines, designed by Julien Marin.

Eight months ago I had said on another thread:

“Well, I have picked up this old discussion about chines and speed because in this year edition of “La Route du Rhum” (begins tomorrow – 29/10), there are two sisterships (design by Jules Marin) that have chines (and are made of wood), on the new 40 class.

Fact is that Jules says that the chines help the boat to plan faster.

I am very curious about the performance of these boats, compared with the other 23 class 40 boats.
…..
About performance, even if the boat is not faster (we have to wait to see) it’s obviously a very fast boat…So I guess that, if well made, chines have not any noticeable influence in the performance of a cruising boat. Of course, here the well made assumes a huge Importance.

http://www.boatdesign.net/forums/showthread.php?t=8727&page=18

Well, on this one , From Sables (France) to Madeira (Portugal) and back, the chined boat really proved its speed. First to arrive to Madeira (over 10k of average speed), first back to Les Sables.

Second one on the finishing line, a completely new boat, beautiful boat, designed by Axel de Beaufort and the Nacira Group . Arrived only 57 minutes after the first one.

On third came Azawakh III a Jumbo 40 designed by Pierre Roland and on 4th place, Merci les amies, designed by Olivier Philippot (also a boat with chines) . First Pogo (the boat that has dominated the Route du Rhum), only comes on 6th place.

Things look interesting and Class 40 is one of the most interesting in what regards boat design, with lots of competition on that level.

http://www.julienmarin.com/gb_architecture.asp

http://www.nacira-design.com/

http://www.lnm-boats.com/pages3/be.html

 

I hope this is the place to post this, but on a link I have lost, NASA was very interested in what are, in effect, chines for fuselages. The upshot of the approach was what they called 'flow management'. I like chines, and have become interested in 1) the differences between knife edge chines to small radius chines, and 2) what differences different angle chines make. These two concerns come from my dinghy and windsurfing days, where chines varied from 50 degrees up to 120 degrees or so. Chines seem to beg the question of flow across the chine angle, which seems in turn to beg the question of reynolds numbers across chines (and therefore turbulance), esp. as seen in different speed regimes (sub planing speed in particular). But how do you measure the speed of flow laterally across parts of the bottom of a hull, much less how much turbulance (or induced drag?) is created 'downstream' of the chine? How much 'lateral downstream flow' does a chine permit? The Alpha 'Race' sailboard approached this problem with acute angle chines, which seemed to work well upwind as lateral plane in sub planing conditions, as well as giving clean release and lift in planing conditions.
It was hard to observe what kind of turbulance they created sideways though. As far as I could tell, there was very little, mainly towards the stern where the hull tucked back towards a pintail stern. 110's are interesting too, as far a chines go. Although my OK Dinghy didn't like chop at all.

Paul