Papin designs a paddle-wheel boat driven by steam, combining Taqi al-Din's jet with Savery's pump. He embarks on September 25, 1707 in Kassel bound for Bremen and London; boatmen at Münden destroy the boat on the Weser. Whether the steam engine was actually installed, or only the plans and loose parts Papin intended to assemble in the vicinity of the Royal Society, remains debated.