• VAUXHALL VX LIGHTNING CONCEPT
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HEAVILY MODIFIED GENERAL MOTORS KAPPA PLATFORM

In order to go into a detailed description of the Vauxhall VX Lightning Concept it is necessary to go back to the inception of the Kappa platform. The General Motors Kappa platform was designed specifically as a sub-compact rear wheel drive chassis for open top roadster applications. The architecture first debuted as a production vehicle in 2006 as the Pontiac Solstice, in 2007 as the Saturn Sky and then as a re-badged Sky in the form of the Opel GT for Europe. It was also sold in South Korea as the Daewoo G2X. A hardtop coupe version of the Pontiac Solstice was produced briefly for the 2010 model year until Kappa production ended with General Motors filing for bankruptcy in July 2009. s a result the Kappa platform was sold to Spanish Car maker Tauro who now use the chassis for their production roadster the Tauro V8 Spider.

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A GM PRESS PICTURE OF THE HIGHLY ADAPTABLE KAPPA PLATFORM

In 2002, the Pontiac Solstice Concept was first shown in two forms, a drivable roadster convertible, and a design study of a fastback coupe. The concept was received very well at the 2002 NAIAS. The problem was the drivable roadster concept car shown had been cobbled together from many different components, including using a heavily modified portion of the GM Delta platform. The thinking at the time was that the architecture might be used to produce the Solstice at some point in the future. Due to the overwhelmingly positive reaction GM decided to go for a production version of the original concept as a high style, low volume niche car for enthusiasts. The problem was they did not have a production ready platform to build it on. Therefore, the Kappa platform was developed to provide the necessary structure for a two-seat, rear-wheel drive convertible. It features hydro-formed rails and a tunnel structure similar to the Corvette

architecture, and is designed for a short-long-arm suspension front and rear. It features rear wheel drive, longitudinal-mounted transmission and front engine mounted well back for weight distribution. GM claimed that the platform was only designed to accommodate the ECOTEC Family II engine as well as only being able to be LHD.

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THE PONTIAC SOLSTICE CONCEPT FROM 2002

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THE SATURN CURVE CONCEPT FROM 2004

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THE CHEVROLET NOMAD CONCEPT 2004

Three other concept vehicles were built off the initial Kappa platform and shown at the 2004 NAIAS: The Vauxhall VX Lightning, The Saturn Curve and the Chevrolet Nomad. All three cars were received reasonably well, but were not nearly as embraced as the original Solstice Concept. The original 2003 Vauxhall VX Lightning Concept is the same size as the original Solstice Concept, and pieced together in the same manner as the 2002 Solstice Concept, and had been shown in Europe several months earlier, before the Kappa platform had been finalized and named (debuting approximately mid-May 2003, for Vauxhall's Centenary celebration). The Vauxhall VX Lightning is the styling pattern on which the appearance of the Saturn Sky is based. When the Vauxhall VX was shown at the 2004 NAIAS, the Lightning part of the name was dropped and the vehicle referred to in the literature at the show as merely the "Vauxhall VX". The Saturn Curve and the Chevrolet Nomad concept cars were built on "modified" versions of the Kappa platform, and exhibited on 12ins longer wheelbases and 2+2 seating. Another concept car, built by Holden and called the Torana TT36, was rumoured to have started as a Kappa based car with a twin-turbocharged V6, but the modifications necessary to accommodate the engine, transmission, and general vehicle size made it almost totally different so the platform was referred to as "based on architecture similar to the Kappa and the Corvette." The Kappa architecture uses major components from nearly every GM division and modern platform:

1. The rear axle and differential are from the Sigma based Cadillac CTS
2. The passenger-side airbag, steering column, exterior and interior door handles are from the Delta based Chevrolet Cobalt / Pontiac G5
3. The heating, ventilating, and air conditioning modules are from the Hummer H3
4. The 2.4 L Ecotec engine is shared with the Delta based Saturn Ion, Pontiac G6 & 5, Chevrolet Cobalt & HHR
5. The five-speed manual transmission is from the Hummer H3, GMC Canyon and Chevrolet Colorado
6. The five-speed automatic is from the Cadillac CTS, STS & SRX

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THE PRODUCTION PONTIAC SOLSTICE WAS VERY CLOSE TO THE ORIGINAL CONCEPT

THE SATURN SKY WAS HEAVILY BASED ON THE PONTIAC SOLSTICE

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THE OPEL GT WAS A CLONE OF THE SATURN SKY AND WAS IMPORTED FROM THE US

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THE PRODUCTION SATURN SKY WAS ALMOST IDENTICAL TO THE OPEL GT AND BUILT IN THE SAME PLANT

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A LESS WELL KNOWN VARIATION WAS THE DAEWOO G2X

The VX Lighting idea came about at the 2002 NAIAS with a meeting of Kevin Wale Vauxhalls Chairman & Managing Director and former Vauxhall design chief Wayne Cherry Vice President GM Design. The idea was to create a concept to celebrate Vauxhall’s 100th birthday based around the same idea as the Pontiac Solstice Concept. Wayne Cherry gave the go ahead there and then. Almost a year later, on 14 May 2003, Vauxhall unveiled the VX Lightning concept at the Dorchester Hotel in London. The Vauxhall Lightning Concept was a joint project between the GM North America (GMNA) Advanced Design Studio in England and the Vauxhall / Opel Design Centre in Rüsselsheim, Germany. The programme was initiated by Wayne Cherry and carried out under the overall direction of Anne Asensio, Executive Director of Advanced Design, and Martin Smith, GM Europe Director of Design at the time. The Lightning was designed and developed at the relatively small GMNA studio in Birmingham (which alas is no more).

The team was headed by GMNA Advanced Design Director and chief designer on the Lightning, Simon Cox and the Vauxhall / Opel Design Centre in Rüsselsheim, Germany. The programme was initiated by Wayne Cherry and carried out under the overall direction of Anne Asensio, Executive Director of Advanced Design, and Martin Smith, GM Europe Director of Design at the time. The team was headed by GMNA Advanced Design Director and chief designer on the Lightning, Simon Cox.

The joint design team included Opel Advanced Chief Designer Stefan Arndt, Dale Grewer (exterior), and Jochen Werner (interior). As a commemorative vehicle the emphasis in the grille and elsewhere was the Vauxhall 'V' motif. It provides a bold front, as the front fascia flares back with two hood lines completing the arrow-like shape that seems to drive the long-hooded vehicle forward. Reinforcing the 'V' theme is the creased centre line of the bonnet, rear deck lid and facia. The angular headlamps continue the themes introduced on the VX220, integrating with the dramatically peaked front wings. In classic British roadster style, the bonnet is long and the rear overhang short. The VX Lightning showed a further evolution of the Vauxhall / Opel form language from the VX220, with a more subtle softening up of the surfaces.

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THE ORIGINAL SKETCHES BY SIMON COX ALREADY GIVE A CLUE TO THE FINAL SHAPE

The rollover hoops beautifully sculpted into the rear deck, with just the touch of a crease, is an indication of the new softer, but still edgy direction GM’s European team was taking. An interesting detail is the polished metal air vent panel in the body side air outlet. The rear view mirrors seem to have been formed by high-velocity air, stretching them to a speed shape.

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