20 September 2025

Isambard K Brunel: railways & shipping.

Industrial Revolution heralded a new age of steel and railways, such that Britain’s Imperial Cent­ury of Dominance flourished over the Emp­ire. The revolution required fac­t­ories and transport systems to pro­cess the imported raw mater­ials, and to export the finished pro­ducts. A new smelting coal met­h­od came when steel inventor Henry Bes­sem­er’s pat­ented a design for the first inexpensive mass pro­duction of steel. He removed impurit­ies from iron by oxid­ation! Steel rails last­ed 10+ times longer than the old iron rails, so that more pow­er­ful locomotives could pull longer trains.

Swindon Museum of the Great Western Railway
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The steam eng­ine freed mach­ines from the lim­itations of water pow­er, meaning factories could be built in the cit­ies! Coun­try workers fl­ood­ed­ in, sear­­ching for jobs and causing cities to flourish. Pro­ducing the wrought iron needed for train-tracks luck­ily dropped costs, allowing the steam train to haul coal and deliver raw materials to fac­t­ory doors.

Now, consider Isambard Kingdom Brunel (1806-59) born in Portsmouth, son of French engineer Marc Brun­el. Isam­bard was sent to France to study, then back in Britain where Dad Marc ensured the lad received a good educ­at­­ion in engin­eering prin­cip­les.

The first steam-assisted crossing of the Atlantic had taken place in 1819, when SS Savannah sailed from Georgia USA to Liverpool. So later Brunel had to persuade his directors that a transatlantic shipping line would be a natural extension to their railway services.

The first pub­lic steam-hauled railway, Stockton & Darlington, op­ened 1825 and the first inter-city railway was soon opened, con­n­ect­ing Liverpool and Manchester. With this new dem­and for steam power came a greater demand for coal; mines were deepened and production boomed.

In 1825, Isambard became an ass­istant eng­ineer creating the under-river Thames Tunnel. He was an en­ergetic leader, but workers died and Brunel himself almost died when the Thames Tunnel was partially flooded in Jan 1828. He was hospit­al­ised in Bright­on, tak­ing months to rec­over. Tunnel-work ground to a stand­­still and the proj­ect wasn’t resumed for some years, but Brunel’s experience was vital.

In 1829 Isambard went to Bristol for a design compet­it­ion for a Cl­ifton Susp­ension Bridge over River Avon. His design was ch­osen, but the pro­ject was halted by the 1831 Bristol Riots. His skills WERE not­ed and in 1833, he became chief engineer for the Bristol Railway pro­ject and immediately set to work.


Clifton Suspension Bridge over the River Avon

He was elected a Fellow of the Royal Society in 1830, and married Mary Elizabeth Horsley, daughter of musician William Horsley in Kens­ington Church in 1836. Their marriage pro­duced 3 happy children.

The Great Western Railway proj­ect was conceived by Bristol mer­ch­ants to ensure their city remained the second most important Eng­lish port, and the chief one for Americ­an trade. The Thames Tunnel (1825) ex­perience had encouraged the Great Western authorities to app­oint Br­unel as chief eng­ineer of their Great Western Railway in 1833.

After a 1835 Act of Parliament, work began with Bru­n­el taking on the sur­veying role, insisting on the new broad gauge rail­way lines (2.1 ms) to increase speeds. NB that the Birmingham-Gloucester Railway had already been built with a standard gauge (1.6 ms).

The first section of the new track from Paddington to Maidenhead was op­ened in June 1838, incorpor­at­ing impres­sive structures. The route was ex­tended, ending in Bristol in June 1841. En route many bridges, via­ducts and tunnels were constructed eg Bristol’s neo-Gothic Temp­le Meads rail­way station and the Chep­stow suspen­sion bridge over the Wye. 

Britain’s government knew that to operate a suc­cessful trade empire, they’d have to ensure fast, reliable and reg­ular shipping. Earlier dev­el­­op­ments in ship­build­ing, like the invention of the screw propeller in 1835, had improv­ed speed. Brunel envisaged an interconnected travel network by which people could travel the length of the country, before crossing the Atlantic to New York. Thus he needed ships that were capable of cover­ing the dist­ance AND carrying people comfortably.

The SS Great West­ern was to be the biggest ship in the world then. Aside from a few early mishaps (including Brun­el himself be­ing injured during an engine-room fire), the ship made its maiden voyage to New York. The SS Great Britain was a wrought iron, screw propelled, ocean-going steamship built in 1843 in Bris­tol, supervised by Brunel for the Great Western Steamship Co. A long and heavy ship, she was designed initially for the Trans-Atlantic luxury pass­eng­er trade. Laun­ched in 1845, it was des­igned for speed and comfort, made from me­tal not wood, powered by an engine not wind, and driven by a prop­eller not pad­dle wheels.

Brun­el modernised ship­building. The steam engine was three storeys high and ran on 200 tons of seawater, stored in the huge boiler, powering the ship at 12 knots. The four decks had excel­lent cabins for 360 pass­eng­ers, and had a lar­ge, lav­ish dining room. Plus there was acc­ommod­at­ion for 120 crew. SS Great Britain also carried 1,200 tons of cargo, and equal amounts of coal. But her career was short lived, af­ter run­ning aground in Nth Ireland in 1846.

In 1854 the SS Great Eastern was being built large enough to be able to sail to Australia and India with c4,000 passengers. Brunel wanted to make long voyag­es econ­om­ically and speedily by steam, which required enough coal aboard for the entire outward voy­age. The const­ruc­t­ion proc­ess of the SS Great Eastern was a trying ordeal; it ran over-bud­get and over-time, and the ship builder John Scott Russell was tough.

Brunel launching the SS Great Eastern in Jan 1858
with John Scott Russell (L) and Lord Derby (R)


The maiden voyage to Weymouth in 1859 resulted in a boiler ex­plosion killing six. SS Great Eastern’s 1st trans Atlantic voy­age was in June 1860 (after Brunel died). It never ful­filled its goal of travelling to Australia, but the vessel succ­ess­fully laid down the first transatlantic cables.

At 53 Brunel suff­ered a stroke in 1859, died and was buried with dad in the Kensal Green Cemetery. An ingenious mechanical mind, Brunel’s legacy lives on in his travel network: dockyards, rail­roads, bridges, ships.

Read Thought Co. by Robert McNamara.




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