Low-tech Magazine

Wind powered factories: history (and future) of industrial windmills

In the 1930s and 1940s, decades after steam engines had made wind power obsolete, Dutch researchers obstinately kept improving the – already very sophisticated – traditional windmill.

The results were spectacular, and there is no doubt that today an army of ecogeeks could improve them even further. Would it make sense to revive the industrial windmill and again convert kinetic energy directly into mechanical energy?

Electric Road Trains

 German engineer Max Schiemann was among the first engineers to develop a commercial trolleybus system for passengers at the turn of the 20th century. He also created some unique cargo systems.

Sailing at the touch of a button

Lloyd Alter at Treehugger talks about our article on cargo ships and wonders if it is time for a new age of sail. One reader comments that sailing boats require a much larger crew than today's cargo vessels, which would make a comeback of wind power unrealistic. Maybe, but these days, sailing boats can also be controlled by computers instead of sailors.

Cargo ships, then and now

On an early afternoon last month, the Eugen Maersk (the world's longest ocean freighter at 1,300 feet) has left Rotterdam, the Netherlands, on the tail end of a journey from Shanghai. But the giant freighter is cruising at 10 knots, well shy of her 26-knot top speed. At about half speed, fuel consumption drops to 100-150 tons of fuel a day from 350 tons, saving as much as $5,000 an hour.

The German Preussen (picture above), the largest sailing ship ever built, was launched in 1902 and travelled mainly between Hamburg (Germany) and Iquique (Chile). It was rammed by a large steam vessel in 1910. A one way trip between Germany and Chile took the cargo vessel between 58 and 79 days. The best average speed over a one way trip was 13.7 knots. The lowest average speed was 10 knots.

One giant container ship can emit almost the same amount of cancer and asthma-causing chemicals as 50 million cars, study finds. Time for a new age of sail.

Picture credit.

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The Museum of Old Techniques

For almost every electronic device or oil driven machine there used to be a low-tech alternative that was powered by human muscles, water or wind. The Museum of Old Techniques aims to collect and study these historical alternatives to modern day machinery. Why, you may ask?

To quote the Museum: "Evolution doesn't necessarily mean progress, what we consider to be primitive solutions are often not primitive at all". We could not have said it better ourselves. The website of the MOT contains, among other things, some 2,000 simple drawings of hand tools (ordered by shape, and by profession) and a collection of illustrated trade catalogues (up until 1950, in French).

A somewhat related publication is Edward H. Knight’s American Mechanical Dictionary (1881) : an almost 3,000 page encyclopedia with descriptions and illustrations of tools, instruments, machines, processes and engineering dating from the 19th century. You need to download a plugin to see the scans.

Knight's book contains not only early electric equipment and steam driven machinery, but also human and animal powered machines. The site is also host to a 1,500 page Western Electric Catalog dating from 1916, describing and picturing electric equipment on sale at the time. Related: hand powered drilling tools & more obsolete technologies.

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Moonlight towers: light pollution in the 1800s

At the end of the 19th century, many towns and cities were lit up by powerful electrical lamps placed on towers up to 300 feet (90 metres) high.

The arc lamp - the first electric light and the predecessor of Edison’s incandescent light bulb - was extremely bright and much more energy efficient than other lighting technologies from those times.

The lamps were too strong for indoor use, but they were regarded as the future of municipal lighting. Especially in the United States, many cities and towns were illuminated as if they were immense sports stadiums.

Sunbathing in the living room: oven stoves and heat walls

Oven stoves are greener, more efficient, healthier, safer and cosier than all modern heating systems. Why are they gone and how do we get them back?

An oven stove is a very efficient and robust oven that radiates heat all day. In the US it was introduced only 20 years ago, but in Europe the technology is almost one thousand years old. Especially in Russia, Scandinavia and Central Europe the oven stove has a long and rich tradition.

In the 18th century, several European governments financed research to improve the technology, as a way to overcome an acute shortage of firewood: ecotech before the term existed. However, its further development and distribution was thwarted by the arrival of coal, gas and oil. Oven stoves are large, heavy and slow, but they offer so many advantages that they – again - deserve to be subsidized by the government.

Tiles as a substitute for steel: the art of the timbrel vault

The craftsmanship associated with timbrel vaulting has long vanished, but the achievements are still with us today.

Brick, stone and concrete are materials strong in compression (you can pile them up almost indefinitely), but weak in tension (if the structural breadth increases, the material has to be supported by many columns or it collapses).

Nowadays, this problem is solved by steel structures or the use of steel reinforced concrete - the tensile strength of steel is significantly more than that of bricks, stone or plain concrete. Pre World War II, the weak tensile strength of brick was compensated for by superior craftsmanship.

The "timbrel vault" allowed for structures that today no architect would dare to build without steel reinforcements. The technique was cheap, fast, ecological and durable.

When rich women built houses

How did ladies spend their time when married to extremely rich men in an era before television, speed-dating and summer festivals? You build a dolls' house (a "dollhouse" if you are American). These incredibly detailed miniature houses and interiors were constructed between the 17th and the early 20th century, mostly by wealthy ladies who often paid artists and craftsmen to make all kinds of objects and parts for them.

A steam powered submarine: the Ictíneo

Few Victorian inventions have the grace and charm of the Ictíneo, the series of two wooden submarines built by Narcís Monturiol i Estarrol in the second half of the nineteenth century.

Unlike some of the better known early submarines from his contemporaries in Germany, France and the United States, the Catalan inventor managed to build submarines that operated flawlessly.

The Ictíneo II was the first combustion engine driven submarine ever, pioneering concepts that were only rivalled in the 1940s. Sadly, both submarines were eventually scrapped and Monturiol died penniless and forgotten.