![National Railway Museum on Twitter: "Behold, Brennan's gyroscopic monorail, patented in 1903. Brennan's daughter became a guinea-pig for prototypes, helping him prove the stability of his invention. The UK War Department even National Railway Museum on Twitter: "Behold, Brennan's gyroscopic monorail, patented in 1903. Brennan's daughter became a guinea-pig for prototypes, helping him prove the stability of his invention. The UK War Department even](https://pbs.twimg.com/media/ExVi9t6XMAASiTU.jpg)
National Railway Museum on Twitter: "Behold, Brennan's gyroscopic monorail, patented in 1903. Brennan's daughter became a guinea-pig for prototypes, helping him prove the stability of his invention. The UK War Department even
![Photograph of Louis Brennan's Gyro monorail, a single rail land vehicle that uses the gyroscopic action of a spinning wheel to overcome the inherent instability of balancing on top of a single Photograph of Louis Brennan's Gyro monorail, a single rail land vehicle that uses the gyroscopic action of a spinning wheel to overcome the inherent instability of balancing on top of a single](https://c8.alamy.com/zooms/6/74fa747005ef4508b76c1340a77266db/mr4w3e.jpg)
Photograph of Louis Brennan's Gyro monorail, a single rail land vehicle that uses the gyroscopic action of a spinning wheel to overcome the inherent instability of balancing on top of a single
![The Brennan Gyro-Monorail: The World's First Single-Track Railcar That Was Never Developed Beyond the Prototype Stage ~ Vintage Everyday The Brennan Gyro-Monorail: The World's First Single-Track Railcar That Was Never Developed Beyond the Prototype Stage ~ Vintage Everyday](https://1.bp.blogspot.com/-9sduO3hx8nM/XiUbwH3yP_I/AAAAAAADtlo/7vXskIo088wdZLAhWyjz5F9ZElwmwJHigCLcBGAsYHQ/s1600/brennan-gyro-monorail-10.jpg)
The Brennan Gyro-Monorail: The World's First Single-Track Railcar That Was Never Developed Beyond the Prototype Stage ~ Vintage Everyday
![The Brennan Gyro-Monorail: The World's First Single-Track Railcar That Was Never Developed Beyond the Prototype Stage | Vintage News Daily The Brennan Gyro-Monorail: The World's First Single-Track Railcar That Was Never Developed Beyond the Prototype Stage | Vintage News Daily](https://vintagenewsdaily.com/wp-content/uploads/2020/01/brennan-gyro-monorail-1-1-640x381.jpg)