is a talk I give on this topic.
The picture is taken from its U3A presentation on 16th
May 2019: a rather under-produced
video shows the demonstration of a prototype.
References of note:
- Garnsworthy, Paul Randall (Editor): Brunel's Atmospheric Railway, The Broad
Gauge Society, 2013
- Hadfield, Charles: Atmospheric Railways, David & Charles, 1967.