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Direct TV programmes are sent by geostationary satellites. One of them, as DIRECTV-9S launched on 13 October 2006, have been carried by ARIANE 5/ECA, the European launcher, currently the most efficient in terms of payload.
The satellite was boarded with 2 others : OPTUS D1 and the mini satellite LDREX 2, in the nose cone of the launcher, with a special design which allows to arrange the 3 satellites, and to release one after each other without trouble.
An ultra-light internal housing structure in composite material, SYLDA (double satellite launching system on Ariane), contains the 2 satellites OPTUS D1 and LDREX2, and supports the third during the flight.
After the ejection of the third satellite, SYLDA is opened by an ultra-fast pyrotechnical cutting system, the upper part is released, so it allows the ejection of the 2 others.
This housing structure, manufactured in the Paris area, in a subsidiary of ASTRIUM SPACE TRANSPORTATION, is mounted with sandwich carbon fibers and aluminium honeycomb panels, presented on a model having the internal shape of the SYLDA and allowing to link those panels by bonding and riveting.
This machine referred to as “assembly and dimensional control jig for SYLDA” is completed by a 6 NC axis machining and control unit, and with adaptive access means so that the technicians can work in the best ergonomics and safety conditions, according to the 6 different housing shapes.
It has been made by a French Burgundian company, PINETTE EMIDECAU INDUSTRIES, in the field of activities of its special equipments and diversification department “SNEPRO”.
This challenge in terms of short planning and technological achievement owes its success to the multi competences of its technical experimented team, and to the close cooperation with its customer, which was deeply involved in this adventure too.
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