What type of transport did Leonardo da Vinci’s self-propelled cart represent?

Leonardo da Vinci’s self-propelled cart represented a spring-powered vehicle.

Leonardo designed the cart around 1478–1480, making it one of his early mechanical projects. Hidden coiled springs supplied the stored energy, while a system of gears controlled the release of that energy to the wheels. The vehicle was probably intended for theatrical displays or court entertainments rather than ordinary transport.

The cart was not powered by an engine, fuel, or an external animal. Its movement came from mechanical energy stored before the performance. Reconstructions have shown that the design could move, although the exact details of the original mechanism remain open to interpretation because Leonardo’s surviving drawings do not provide every construction measurement.

It is often described as an early ancestor of the automobile. That comparison is useful, but it should not suggest that Leonardo created a practical motorcar. The cart had limited stored power and was designed for short, controlled movement in a performance setting.