Mirabella V

Mirabella V is a sloop-rigged yacht, the largest single-masted yacht in the world. This super yacht was built in 2003 at a cost of $50 million. Mirabella V is owned by Joe Vittorai, former CEO of the Avis car rental company, who makes it available for charter cruises. The Mirabella V is a unique sailing vessel that combines high performance sailing capabilities with the luxury found on motor yachts.

This YouTube video has some great aerial footage of Mirabella V under sail with a strong wind:

Mirabella V is capable of performance of 20 knots to windward when under sail.