English LESTHREOL means: LESTR : means
Vessel and HEOL : Sun - hence 'Sun Vessel'
LESTRHEOL project was initiated as a collaborative study
between two schools : l'Ecole
Navale et le lycée La croix rouge . The objective
of this project was the design of a small innovative
boat to be driven by solar energy. Students of the two
schools completed studies with the same specifications.
project was realised with an industrial partner : It's a
young company named "STELPA design et prototypage"
de Port-la-forêt (56) FRANCE. The initial project was
undertaken from November 1999 to july 2000.
manufacturing cost was minimized with help from civilian
and military partners.
choices have been made to obtain an innovative and
original product. Some photographies
can be seen.
prix de l'Ecole navale"
is is a sailing regata organized by the french naval
academy, featuring the Lestrheol.
length: 6.47 m: width: 1.67 m: draught: 0.75 m
battery autonomy: 3 hours
rotation rate: 500 rpm
and innovative nautical solar powered boat
weight of the hull
shape: wave-breaking bow
composite for the hull shape
solar panels (Webasto): 500 W - 24 DC V
sealed for use in marine environment - (21 kg)
Electric batteries: 12 DC V - 60 Ah (36 kg)
- Autonomy: 3 hours
motor power : 650 W - 24 DC V
regulator + variable speed controller
by tractive pod and electric motoreducer
: Modified Wageningen blades, 4 blades, 400 mm
stress: 160 N (estimated) at 6 knots
Etudes des élèves de l'Ecole navale concernant
orientable rudder only
orientable pod only
both orientable pod and rudder
of the propulsive system
of the manoeuvrability system
about the sheer stress
of the adapted propeller
of a special tow to take the boat on
of new motors for this boat
of manoeuvrability with orientable pod or not.
Important design choices
pannels stick on the roof
in a orientable pod
with orientable pod and rudder
propeller in front of the pod
can have a look to :
Presentation at the SIMOUEST
workshop session poster
presentation (1,7 Mo - It needs a few minutes to
Design & Prototypage (Paolo RISTA - Port-la-forêt
56): Manufacture of the shape
and Manufacture team (SEF) of the IRENav
(Research institute of the Ecole Navale) :
Manufacture of mecanical system and pod.
électrotechnique (SEF) de l'IRENav (Institut
de Recherche Ecole Navale) : Câblage électrique
Polytechnique fédérale de Lausanne (CH) : Usinage
school La croix rouge de Brest (29) FRANCE :
Study of the motor and the control system
Solar boat links
sur les bateaux solaires en suisse - compétition et
of the annimation View
of a presentation of the project
at the Ecole navale:
Ecole Navale - ENGEP
BP 600 Lanvéoc-Poulmic
29240 BREST NAVAL
: 02 98 23 40 20 Phone :
(33) 298 234 020
Fax : 02 98 23 38 57 TCP : (33)
298 233 857
07905 147709 (UK)