The Atmospheric Railway

Associated With

Samuel Clegg, Jacob and Joseph Samuda; South Devon system pioneered by Isambard Kingdom Brunel - inventor, South Devon system pioneer

Defining Feature

A track-centre vacuum pipe, piston and leather sealing flap supplied by stationary pumping engines

Status

Discontinued - South Devon atmospheric operation ended on 10 September 1848

Overview

The South Devon atmospheric railway moved trains without carrying a locomotive at the front.

Stationary steam engines drew air from a pipe between the rails, allowing atmospheric pressure to push a piston attached beneath the leading vehicle.

The system began operating between Exeter and Teignmouth in September 1847 and reached Newton Abbot in February 1848.

Why It Mattered

It offered a striking alternative to conventional steam traction: the power came from pumping stations along the route rather than an engine hauling each train. Its brief life also exposed the weakness of that ambition, because miles of leather-sealed pipe had to remain flexible and airtight in everyday service.

Propulsion system

• Stationary steam engines removed air from a pipe laid beneath the train.
• Atmospheric pressure acted on a piston connected to the first vehicle through a sealed slit.
• Clegg and the Samuda brothers patented a workable atmospheric system in 1838.

South Devon operation

• The first Devon atmospheric train ran between Exeter and Teignmouth in September 1847.
• Brunel pioneered the South Devon atmospheric railway between Exeter and Newton Abbot.
• The system reached Newton Abbot in February 1848 and ceased operation that September.

Maintenance limits

• The leather flap had to remain flexible and airtight over an exposed linear pipe.
• Newton Abbot Museum records difficult operation, seal damage and high running costs.

Gallery