Emirates Spinnaker Tower mid-2005. Because of the six-year delay in opening and not having been ready for the Millennium as planned, the tower was renamed as Spinnaker Tower. The overall development project was over budget, with the tower costing £35.6 million alone. Taxpayers were never intended to fund the tower, but Portsmouth City Council eventually contributed £11.1 million towards construction. In March 2004, Portsmouth Council's former leader Cllr Leo Madden resigned as leader of the Labour Group on the council after a highly critical report of the council's handling of the project and its failure to exploit revenue opportunities, such as the Millennium.
Spinnaker operate within an airflow that generates lift. A well designed spinnaker will have taut leading edges when filled; leading edges that curl in will both reduce the lift and risk of collapse of the spinnaker. A well designed spinnaker will also have a smooth curve when filled, with no bubbles or depressions caused by inconsistent stretching of the sail fabric. Any deviations from a smooth curve will cause the airflow over the leeward side of the sail to separate causing a reduction in lift and reduced performance. There are two main categories of spinnakers, symmetric and asymmetric depending on whether