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HELIOTROPE - FRANCE |
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This was the first French solar powered racer to enter the World Solar Challenge (Darwin
to Adelaide : 3,000 Km
Solar-Electric Race, Australia), 1996
Heilotrope team at the WSC finish line 1996
Heliotrope is an interesting concept, in that the driver is positioned head first in an effort to reduce the frontal area, hence reduce the drag. The same theme was employed in the BE1 land speed record car, for the same reasons.
Heilotrope charging its batteries
DESCRIPTION :
She is a three-wheeler design with a side-car motorcycle like layout. The wing is removable with a bearing wheel tilted at 2O° and attached to the right or the left side of the main section. The vehicle also features on-line data acquisition, data and voice radio-transmission.
Heliotrope achieved 3rd place in the "Lead -acid batteries" category. Out of 54 entries and 27 competitors she finished 21st with an average speed of 42.2 Km/hr during mediocre weather conditions. (1994-1996)
Heilotrope - concept drawings revealing prone driving position
CHASSIS/BODY :
Heliotrope
incorporates an innovative general layout to
increase
solar electricity generation by around 15% under WSC conditions. The
body/chassis shell is made of carbon-epoxy
composite material and
honeycomb. The spats which shroud the strut suspension are self
orienting into the wind.
Body
buck of Heilotrope under construction
ELECTRICAL SYSTEMS :
A sustom-made DC brushless wheel-motor and controller was used with a nominal power of 1200W at 800rpm. The overall efficiency was 92%.
Batteries :
Lead-acid, 2.4kWh, 77Kg
Photovoltaic generator : 7.9 m2, silicon cells (16.5%), 8 Maximum Power Trackers.
Theoretical
Power : 1128W at 1000W/m2 (measured peak power :
1430W) Heilotrope
underside detail Length :
5400mm, Width : 2000mm, Height : 1000mm Wheelbase :
2400mm, Track : 1000 mm, Weight : 280Kg Front
area : 0.90m2 ; Drag Coefficient : 0.12 (theoretical) Suspension
: Custom-made
telescopic with oleopneumatic adjustable spring/dampers. Wheels
: Custom-made aluminium wheels
(double disk) Tyres
: Michelin
Solar 65/80-16 radial tyres (510kPa); very low rolling resist. Maximum solar speed
: 70Km/hr Budget : US$ 500,000
Heilotrope
- suspension and wheel motor TEAM
: Design,
CadCam, Management, Funding : Luciano
Giol (It-Fr) Mechanical
Engineering : Dominique
Rochier (Fr) Electrical
Engineering : Michel
Lajoie-Mazenc (Fr) Photovoltaic
Generator : Hans Gochermann (Ge) Moulds
& Composite Materials : Christophe
Konya (Fr)
Heilotrope
team at the WSC finish line 1996
CONTACTS
: LUCIANO
GIOL Tel/Fax 33 5 57 43 36 46 E-mail :
lucien.giol@wanadoo.fr
Mail :
21 rue de Piote, 33240 Aubie, France
LINKS TO OFFICIAL HELIOTROPE SITE :
View Heliotrope CadCam imagesView Heliotrope picturesView World Solar Challenge 1996 picturesHeliotrope X PROJECT 2006-2008Luciano Giol Résumé
The Website is sponsored by Solar Cola
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