In the mid-19th century, legendary Victorian engineer Isambard Kingdom Brunel sought to eliminate noisy, smoke-belching steam locomotives from Britain's railways. His revolutionary alternative was the South Devon Railway's atmospheric system, inaugurated in 1847. Instead of carrying heavy engines onboard, trains were propelled by stationary steam pumping stations located every few miles along the line.
These stations exhausted air from a continuous cast-iron pipe laid between the rails, creating a vacuum ahead of a piston connected to the train. The critical engineering challenge was sealing the longitudinal slot along the top of the pipe while allowing the piston arm to pass through. Brunel solved this with a continuous leather flap, lubricated with tallow and beeswax, that opened as the piston moved forward and sealed shut behind it using a trailing wheel and heated iron.
For a brief period, trains glided smoothly at speeds exceeding 60 miles per hour, offering a quiet and clean ride unprecedented for the era. However, the system ultimately failed due to material decay and unforeseen biological sabotage. The sea spray along the Devon coastline degraded the leather, while local rats and seagulls discovered that the tallow-and-beeswax coating was an edible feast.
The constant maintenance costs to repair gnawed, dried-out leather seals became unsustainable, forcing the railway to abandon the atmospheric system in 1848 in favor of conventional locomotives.