A sail bogey or sail trolley is a wind-driven vehicle that runs along railway tracks.

Examples

Spurn railway

The Spurn railway, built along Spurn Head on the Yorkshire coast of England was built in the First World War and ran until the early 1950s and included sail bogies as part of its rolling stock.

Teesmouth lifeboat

In the early days of the Teesmouth lifeboat, its crew were sometimes able, subject to wind conditions, to travel out to the lifeboat station at South Gare on a sail bogey.

Madaras Rotor Power Plant Project

In the 1930s, the US government investigated using rotating vertically-mounted cylinders (90-ft tall by 22.2-ft Dia) mounted on a rake of flatcars in a closed loop on a circular track to generate electricity. The project, known as the "Madaras Rotor Power Plant", used the Magnus Effect to transfer the wind energy into thrust to accelerate the "Train" whilst alternators fitted to the axles of the flatcars generated electricity which was fed back to the system through a trolley system.

Others

Other locations to have used sail bogies include:

Replica

More recently, in 2005, a replica of a 19th-century sail bogey was built and demonstrated on the Ffestiniog Railway in North Wales.