Rollfähre Korneuburg–Klosterneuburg, Reaction ferry across the Danube between Korneuburg and Klosterneuburg, Austria

The Rollfähre Korneuburg–Klosterneuburg is a cable-guided reaction ferry at Danube kilometre 1941.7, linking Korneuburg on the left bank with Klosterneuburg on the right. Its steel cable, 380 m long and weighing 6,500 kg, was tensioned by pioneers on 10 July 1935. The ferry carries up to 25 tonnes or 40 people, with room for four cars.

A ferry opened here in 1894 as a Fliegende Brücke, a flying bridge, and was destroyed for good by the great ice jam of winter 1928/29. In 1935 Korneuburg and Klosterneuburg had it rebuilt as a reaction ferry, with the Augustinian monastery of Klosterneuburg paying a third of the cost. The ship was launched on 11 May 1935, pioneers tensioned a 380 m steel cable weighing 6,500 kg on 10 July, and service began on 12 September 1935. It has been privately owned since 1994.

Since 1994 the ferry has been privately owned and is often taken for a nostalgic trip across the Danube rather than a simple crossing. The Augustinian monastery of Klosterneuburg paid a third of the construction costs in 1935, which is why the ferry has long been associated with the abbey on the right bank.

The ferry runs from 7am (8am at weekends) until dusk, from March to early November. It carries up to 25 tonnes, 40 people or four cars, and is suspended when the Danube floods or carries ice. The crossing lies at river kilometre 1941.7.

The boat moves without an engine, relying solely on the river current and a cable system for control. Two motors are only kept on board for emergencies when the river's natural force is insufficient.