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<TITLE>AYRS Newsletter July 1997 July 97 Newsletter text </TITLE>
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<H1><A NAME="P253_33617"></A> <IMG SRC="Aqwvblt.gif" WIDTH="9" HEIGHT="9" ALIGN="BOTTOM"
ALT="Icon" BORDER="0"><FONT SIZE="5" COLOR="#333333" FACE="Arial"><B>T<A NAME="P253_TechAvX"></A>echniques
Avancées<IMG SRC="Aqwvblt.gif" WIDTH="9" HEIGHT="9" ALIGN="BOTTOM" ALT="Icon"
BORDER="0"></B></FONT></H1>
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<P><FONT SIZE="4" FACE="Arial"><I><B>by Simon Fishwick, using pictures and information
from the Internet</B></I></FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">Since 24 June 1997, the catamaran "Techniques
Avancées" has claimed the Class D World Speed Sailing Record with a speed
of 42.1 knots.</FONT></P>
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<P><IMG SRC="797-3.JPG" WIDTH="384" HEIGHT="291" ALIGN="BOTTOM" ALT="Techniques Avanc�es"
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<H3><FONT SIZE="4" FACE="Times New Roman"><B>DESCRIPTION</B></FONT></H3>
<P><FONT SIZE="4" FACE="Arial">Total empty weight: 370 kg.</FONT> <BR>
<FONT SIZE="4" FACE="Arial">Weight of each wingsail: 55 kg.</FONT> <BR>
<FONT SIZE="4" FACE="Arial">Beam: 8.0 m.</FONT> <BR>
<FONT SIZE="4" FACE="Arial">Length overall: 10.5 m.</FONT> <BR>
<FONT SIZE="4" FACE="Arial">Sail area: 27,89 m2.</FONT> <BR>
<FONT SIZE="4" FACE="Arial">Material: A sandwich of Carbon fibre pre-preg around
a Nomex honeycomb core, cured at 120ºC</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">The project is entirely run by engineering
undergraduate students of the French National College of Advanced Technology (Ecôle
Nationale Supérieure des Techniques Avancées - ENSTA) as ongoing project
work during their course. The project commenced in 1986 with conceptual, theoretical
and tunnel studies, and the catamaran was built in 1988-89. During its first trials
in the winter of 1990-91, it achieved a speed of 27.43 knots (over 50 km/h) - missing
taking the then C-Class speed record by 0.14 knot!</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">From that early, and promising, start, successive
teams of students refined the design, and slowly the speeds achieved were increased,
until by September 1994 they had recorded a speed of 35 knots (65 km/h). At this
speed, they began to experience trouble with the rudder, and were obliged to curb
their speed until they had found a fix.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">A new rudder was made, new research was
done, new foils made. The French navy became involved, seconding to the project several
former members of the team who had graduated and were doing their national service!</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">Trials continued, new foils fitted, and
in April of this year, they recorded a speed of nearly 40 knots in 25-30 knots of
wind - a somewhat lower boatspeed/windspeed ratio than Longshot or YP Endeavour,
but enough to show that they needed only a gale of wind, not a storm. Finally, they
have now recorded and claimed the record speed for Class D (unlimited sail area).
Their next target is obviously the outright record.</FONT></P>
<H2><A NAME="P276_35535"></A> <FONT SIZE="4" COLOR="#006697" FACE="Arial"><I><B>SPONSORS
AND PARTNERS</B></I></FONT></H2>
<P><FONT SIZE="4" FACE="Times New Roman">"Techniques Avancées" is
not of course without its sponsors and supporters, and the team acknowledge in particular
the help they have received from:</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman"><B>DGA/DCNavale</B>: finance for the major
part of the technical achievement of the challenge; construction of the platform
(hull and crossbeams) at DCN at Lorient; Secondment of four student-officers from
the DCN reserve at Toulon.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman"><B>The French National Navy</B>: Impressed
by the results obtained in two months of trials, the French Navy expressed a wish
to participate more actively in the challenge from the 1994-1995 season.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman"><B>Direction de Construction Aéronautique
(Centre d'Essais Aéronautique á Toulouse)</B>: Undertaking tests of the
foils in trim and at true speed in a hydrodynamic tunnel. In 1996, also, different
forms of bulbs were tried on the rudder in collaboration with the Hydroptère
team.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman"><B>L'AGPM</B>: financial underwriter.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman"><B>H. de Turckheim (TIGA R&D)</B>: Technical
advice on manufacture.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman"><B>Eurovoile</B>: support supplies (hardware,
servicing of support craft)</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman"><B>Hobie Cat</B>: sailing equipment.</FONT></P>
<H2><A NAME="P294_36580"></A> <FONT SIZE="4" COLOR="#006697" FACE="Arial"><I><B>L'ECOLE
NATIONALE SUPÉRIEURE DE TECHNIQUES AVANCÉES</B></I></FONT></H2>
<P><FONT SIZE="4" FACE="Times New Roman">The Ecôle Nationale Supérieure
de Techniques Avancées, founded in 1971, trains engineers to a high (degree/masters)
level in: structural and fluid mechanics, computer science, electronics, automation,
artificial intelligence and naval architecture.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">Young and dynamic, it possesses a system
of personalised instruction which permits several teams of students to follow directed
studies, and to carry out typical industrial scale projects, such as designing and
building a catamaran on hydrofoils capable of beating the world sailing speed record,
and demonstrating that a foiler, fitted with a rigid rig, can sail at high speed
in a stable manner.</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">The students assigned to this project have
benefited, since the start, from the continuity in passage of responsibilities from
old team members to those who succeed them. Those who are currently in place for
the season 96-97 ascribe their team-spirit and "polyvalence" to those who
went before. In particular, they cite:</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">· the benefit from their scientific
instructors and other experts at ENSTA</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">· the three permanent members who,
since Sept 96, have been based at La Seyne Sur Mer and ensured, by their perfect
knowledge of the prototype and their rapid reaction to unforeseen events, that "Techniques
Avancées" was well-maintained in good condition for an ever-more-demanding
sailing programme;</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">· SIX students of ENSTA, profiting
from the opportunity given by ENSTA to undertake research work during their studentship,
who worked to optimise the catamaran in several areas (profile of foils and the rudder)</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">· the five members of the association
who assured the vital communications and found sponsors and partners; and finally</FONT></P>
<P><FONT SIZE="4" FACE="Times New Roman">·<B> Gérard NAVARIN</B>, the skipper
of the catamaran, who has all the practical experience needed to manage the team.
His careful comments are immediately analysed, and many improvements made as a consequence.
In addition, over several trials, he has become the ideal test-pilot for "Techniques
Avancées".</FONT></P>
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<P><IMG SRC="797-4.gif" WIDTH="189" HEIGHT="182" ALIGN="BOTTOM" ALT="Line Dwg: Techniques Avanc�es"
BORDER="0"> <BR>
<FONT SIZE="4" FACE="Arial"><I><B>The concept of Techniques Avancées</B></I></FONT></P>
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