Brunel�s Atmospheric Pipe | Didcot Railway CentreLiving Museum Of The Great Western RailwayAdjacent to the broad gauge running line is a display on Brunel's ill-fated attempt at ‘atmospheric’ propulsion. The three 22” diameter cast iron pipes are a relic of I K Brunel’s flirtation with atmospheric traction on the South Devon Railway. The tubes https://didcotrailwaycentre.org.uk/article.php/428/brunel-s-atmospheric-pipe