Mirabaud-Super Foiler!

[Doug Lord]

Some new pictures of Mirabaud-Thomas Jundt's new super foiler. This one shows DUAL WANDS quite far aft(click on the picture):
More pictures here:http://www.photonautique.ch/web/photo.asp?search=true&rubrique=135&ID_PHOTO=3161&mot_cle=&bateau=&actualite

[Meanz Beanz]

http://www.photonautique.ch/banque_image/3160.jpg

I would like to see video of how it goes at displacement speed's. This snap makes it look quite good at slower speed. I'm wondering how much the foils are helping here.

There was a discussion a while back in the multihull section about space frames. Alot of people where saying that they where not an efficient structure and monocoque was the only way to go. F1 examples and on it went... these guy seem to be flying in the face of this "wisdom"... literally :D

You know if they ever allow foils in 18's and they dimension this thing right I reckon you might just have a glimpse of the future of the class here.

[Doug Lord]

From Antoine in the Swiss Foiling Machine thread:
" Thomas (the engineer behind the project, who just posted answers to various questions) is probably too modest to say it, so I will: in its first race on a lake, namely the Bol d'Or du Lac de Neuchatel, in Switzerland, organised by the Cercle de la Voile de Grandson, the prototype foiler "Mirabaud LX" took 1st place in "monohulls", 17 minutes ahead of a (modified) 18-footer on a course lasting about 5 hours. The first "normal" monohull was a 42'' racer another 20mins behind.

Mirabaud LX was also only about 20mins behind the last multihull of the 32'' class Ventilo 32 (there's a very active and competitive fleet of these boats in French-speaking Swizerland).

This was in spite of very light airs which for the most part (1) prevented the LX from flying, and (2) made it a very tiring work for the crew to keep the boat on it's mini "hull".

So all in all, a pretty impressive achievement. And clearly if they have more wind in their next race, they might be able to (1) get further ahead of other monohulls, (2) possibly start mixing up w the fast multihulls.

Well done!
===================================
Thomas Jundts Blog: http://www2.jundt.ch/blog/
One thing that may not be appreciated by many is that Mirabaud is now the largest bi-foil monofoiler in the world and that,in and of itself, is a notable achievement.
I will continue to add details and references about this spectacular boat as I find them........

===========================
Thomas is also, apparently, continuing development of his foiling 18 and there
is a second foiling 18:

[Doug Lord]

Thomas and Mirabaud LX are racing this weekend in the Lake Geneva "Bol d'or Mirabaud". They recently won the Lake Neuchatel Bol d'or. 500 boats inclulding many top high tec cats on Lake Geneva this weekend. Yves Parlier is there demonstrating his kite powered planing cat. Mirabaud could make history....
Good luck guys!
http://www.thedailysail.com/ism/articles.nsf/News/C2E69CD84D7FDC0D8025746600467F61?OpenDocument&Login

[Doug Lord]

Mirabaud 53rd(out of 500) in todays race. 9th in class.....
http://www.boldormirabaud.com/boldor2008/ch/en-ch/index.cfm?page=/boldor2008/home/course/arrivee_reel&classement=nautique
Daily Sail story of the race:
http://www.thedailysail.com/ism/articles.nsf/News/D2AA745DBAF7F2018025746B0033059F?OpenDocument&Login

[asetenta]

Whats the max speed this boat can reach?

[Doug Lord]

The boat is optimised for relatively light air but has done over 20knots so far.
I'd bet 30+ is possible.....A Moth foiler has done 27....

[Doug Lord]

New Pix:

[wind_apparent]

I want one..........:D (it would be great for Thursday night club racing.....nacra who?)

[Doug Lord]

Great video incl. the first foiling gybe for this size monofoiler:
http://www2.jundt.ch/blog/

[wind_apparent]

boy is that thing squirly, I love it.......

[Doug Lord]

Some insight on a couple of the innovative experiments Thomas is trying on the new boat: (e-mail published with Thomas Jundts permission)
"Thank you Doug

Yes training/testing session :

- The foil position (in front of mast) works well, Mirabaud flies better and flatter than AET[the foiling 18dl]

- The double wand système seems to work well, in any case total symmetric reactions when going upwind

Regards

Thomas"

[Doug Lord]

Mirabaud has done some testing in preparation for a speed record attempt.
According to the Mirabaud website they tested the Garmin GPSmap 76s,Garmin Foretrx 201 and the Velocitek SC-10. Only the Velocitek met the Syz & Co Leman Sailing Speed Record Requirements.
This will be very interesting.......

[wind_apparent]

do you know what record they are going after?

[Doug Lord]

1000m according to the rules above,I think.

[Doug Lord]

New pix-and a new record-awaiting more info...

[antoineb]

- first, On Mirabaud LX's site I read about a first record attempt on a 1km course, they've established 23 knots. Which clearly the M28 or D35 multihulls on Lake Geneva, should be able to beat easily. Though it's less clear which monohulls can beat it easily (but yes some Moths have been clocked over 25 knots).


- second, over the week-end and from two friends, I heard that Mirabaub LX had recently made an attempt against the Ruban Violet, ie Geneva to the end of the lake and back, but broke during that attempt. I've not been able to find any update on the web about this? If confirmed it would obviously be quite sad.

[Doug Lord]

Interesting presentation by Thomas Jundt:
http://www2.jundt.ch/blog/?p=275

[Doug Lord]

Thomas is adding a new hull- http://www2.jundt.ch/blog/
old hull shown in rendering with rig and picture under sail:
-------
Update 4-15-09: Thomas says the modified boat ( new hull, 70% stiffer top mast, new wand system and optional forward wand) will be sailing within a week.

[Doug Lord]

Here are some extraordinary pictures and a video of the boat flying w/o the hull:
video here: http://www2.jundt.ch/blog/
click to enlarge photo's---

[BWD]

plus ca change, eh
the formidability:kookiness ratio still seems a bit off.

[Doug Lord]

Just found out from Thomas that the team is experimenting with manual altitude control-the bowman controls the main foil flap. Thomas says it works quite well-they just have to develop a system to do it with the bowman on the wire. Another way to reduce drag and weight....

[Doug Lord]

Congratulations to Mirabaud for winning the Geneva-Rolle-Geneva classic(monohulls)-beating Full Pelt and others!
http://www.sailkarma.com/2009/06/geneve-rolle-geneve.html
Oops! capsize after winning....

[Paul B]

Congratulations to Mirabaud for winning the Geneva-Rolle-Geneva classic-beating Full Pelt and others!


The foiler: 3 hours 43 minutes.


The Décision-35 catamaran Okalys-Corum with Loïck Peyron of France took line honours in the Genève-Rolle-Genève race, completing the course at an average speed of 20 knots but failing to the break the record of 2 hrs 7 minutes by just 4 minutes.

The catamaran: 2 hours 11 minutes.

[PaulM]

Anyone know how that compared to the best 18 foot multhulls ? (F18HP I guess)

Whatever, quite an achievement to get sorted to a race winning state and good luck for the bol'dor

[Doug Lord]

What I do know is that Mirabaud and a Bladerider(I think) were nearly identical in speed over a measured kilometer last year and that another foiler Moth several years ago beat separate fleets of F18's and A Class cats around a course. And Thomas thinks the boat is much improved this year.....
------------------
Found this interesting tidbit on Rohan Veals site:
So I am not sure what the Foiler Moth Yardstick is going to be for 2009/10, but I would not be suprised if it is in the low 70's or even high 60's now. This would then put the Foiler Moth in the same league now as the A Class (71), F18 (70), 18' skiff (68), Taipan 5.7 with kite (67.5) and Tornado (65). Looking at these numbers though, I think the 18 footers should be around 65 with the Tornado and we should be around 68-69.
-------------------
Here is a video of a Moth and A class from Marco Cassavechia and his comments:

http://www.moth.it/Video/MothMeetingCVCE.wmv
In this occasion the Moth was faster than the A class Cat.
I was there.
Marco.

[Paul B]

Anyone know how that compared to the best 18 foot multhulls ? (F18HP I guess)


As you can see, the resident blowhard of foiling doesn't have an answer to your question, but had to spout off.

The results seem to indicate there were only two types of multis in the race, the D35s and the M2 Class (Formula 28?).

EVERY Multi in the race finished ahead of the foiler.


http://www.ycg.ch/images/files/FinalClassementMulticoques.pdf

[Doug Lord]

From Scuttlebutt Europe:

Mirabaud LX Will Take Part In Weymouth Speed Week
Click on image to enlarge.

Geneva, Switzerland: The famous foiler Mirabaud LX and his skipper, Swiss engineer Thomas Jundt, are getting ready for Weymouth Speed Week (October 16-22).

Weymouth Speed Week exists since 1972; it is one of sailing's mythical events. The speed week has been a meeting point for sailing fans, designers and inventors for decades. Kiteboards and windsurfs have taken over recently, yet Weymouth Speed Week remains a dream for Thomas Jundt and a fantastic environment in which to test his foiler and share views with other speed sailing fans.

"Icarus, the Tornado with hydrofoils, has been a source of inspiration for me", explains Thomas Jundt. "This boat - and so many others - have been conceived especially for Weymouth Speed Week. It is fantastic for me to be able to join this legendary event with the Mirabaud LX."

Geneva based sailors jean-Pierre Ziegert and Jean-Marc Monnard will sail on board Mirabaud LX as crewmembers, replacing the usual crew of Antoine Ravonel and Eric Gobet. "Our goal is to validate the changes we have made this year", explains Jundt. "We are going to be able to fly during four hours every day in ideal conditions, with a lot of wind and no waves. We will probably achieve more in a week than we have done over the entire year in Geneva."

Jundt has developed new foils for this season, and relies on Weymouth Speed Week to top up the 25 knots barrier over 500 meters, and to reach over 28 knots on shorter distances. "As far as today, the best we can do is 21 knots over 500 meters and 23 knots on shorter distances. Our new foils should allow us to gain 2 to 3 knots."
www2.jundt.ch/blog/

[daiquiri]

Anyone knows why was the trusswork left exposed? It is a high-drag structure.

[Doug Lord]

They did it as an experiment with the intention of, perhaps, skinning it someday. You're absolutely right about drag, in the Bill Beaver paper on the Moth aerodynamic drag-particularly for the crew- was surprisingly high as a percentage of total drag.

[DennisRB]

Trimaran - Catamaran - Monohull - Zerohull?