London Eye

The wheel carries 32 sealed and air-conditioned egg-shaped passenger capsules, attached to its external circumference, each capsule representing one of the London Boroughs. Each 10 tonne capsule holds 25 people, who are free to walk around inside the capsule, though seating is provided. It rotates at 26 cm (10 in) per second (about 0.9 km/h or 0.6 mph) so that one revolution takes about 30 minutes. The wheel does not usually stop to take on passengers; the rotation rate is slow enough to allow passengers to walk on and off the moving capsules at ground level. It is, however, stopped to allow disabled or elderly passengers time to embark and disembark safely.

The rim of the Eye is supported by tie rods and resembles a huge spoked bicycle wheel, and was depicted as such in a poster advertising a charity cycle race. The lighting for the London Eye was redone with LED lighting from Color Kinetics in December 2006 to allow digital control of the lights as opposed to the manual replacement of gels over fluorescent tubes.

The wheel was designed by architects David Marks, Julia Barfield, Malcolm Cook, Mark Sparrowhawk, Steven Chilton, Frank Anatole and Nic Bailey. Mace were responsible for construction management with Hollandia as the main steelwork contractor and Tilbury Douglas as the civils contractor. Consulting engineers Tony Gee & Partners designed the foundation works while Beckett Rankine designed the marine works.

The wheel was constructed in sections which were floated up the Thames on barges and assembled lying flat on piled platforms in the river. Once the wheel was complete it was raised into an upright position by a strand jack system, at 2 degrees an hour until it reached 65 degrees. It was left in that position for a week while engineers prepared for the second phase of the lift. The total weight of steel in the Eye is 1,700 tonnes (1,870 short tons). The project was European with major components coming from six countries: the steel was supplied from the UK and fabricated in The Netherlands by the Dutch company Hollandia, the cables came from Italy, the bearings came from Germany (FAG/Schaeffler Group), the spindle and hub were cast in the Czech Republic, the capsules were made by Poma in France (and the glass for these came from Italy), and the electrical components from the UK.

Nathaniel Lichfield and Partners (NLP) assisted the operators of the London Eye, the Tussauds Group, in obtaining planning and listed building consent to alter the Wheel on the South Bank of the Thames. NLP also examined and reported on the implications of a S106 attached to the original contract.

NLP also prepared planning and listed building consent applications for the permanent retention of the attraction on behalf of the London Eye Company. This has involved the co-ordination of an Environmental Statement and the production of a planning supporting statement detailing the reasons for its retention. constructed in 2005