The Future Will Not Be Like The Past (1)

“We imagine that energy decline and economic collapse will eradicate all high tech, and reduce the whole planet to a preindustrial lifestyle, because it’s easy to imagine. It’s harder to imagine a collapse that’s unevenly distributed. Historically, economic collapses do not reduce everyone to poverty, but increase the gap between rich and poor. I think the same thing is going to happen with technology: while overall resource consumption decreases, the proportion spent at the leading edge of technology will increase. Less energy will be spent moving physical stuff, and more will be spent moving information.”

“Not only will there be a wider gap between the places with the highest and lowest technology, there will also be a wider gap between the highest and lowest technology used by an average person. Already there are African villagers with cell phones. In 20 years you may be living with a group of friends in an abandoned suburb, burning scrap wood for heat, growing open-source genetically modified sweet potatoes, and selling brain time to the dataswarm to gain credits for surgery to install a neuro-optical interface so you can swap out custom eyeballs.”

Quoted from Ran Prieur’s blog.

The Concrete Lathe Project

concrete lathe

“Metalworking lathes are necessary to the production of almost everything but are very expensive. In 1915, special lathes made from concrete were developed to quickly and cheaply produce millions of cannon shells needed for World War I.

Lucien Yeomans, the inventor, won the nation’s highest engineering award for it but sadly the technique was almost forgotten after the war. We re-discovered it as a way to quickly make inexpensive but accurate machine tools for use in developing countries and in trade schools and shops everywhere.”

Pat Delany developed a metalworking lathe design that uses concrete parts cast in wooden molds to achieve high precision at a rock-bottom price of $150. Find the detailed building plans at Make Projects. Also check out Pat Delany’s low-cost DIY machine tools (such as a hand-powered drill and a treadle-powered generator), all built from recycled parts.

Velomobiling

A fifteen minute ride in a velomobile. Previously: The velomobile: high-tech bike or low-tech car?

Open Source Energy Production: The Solar Fire P90

solar fire p90

Solar Fire is currently testing a larger version of its low-tech solar concentrator; the Solar Fire P90. Just like its smaller predecessor the Solar Fire P32 (which we covered before), the machine can produce heat, electricity and direct mechanical energy, making it suitable to manufacture almost anything on your roof or in the garden.

The Solar Fire P90 delivers up to 5 kW of electricity and 40 kW of thermal energy, is built using simple, abundant and non-toxic materials, and requires no foundation in the ground. The frame size is 11.5 x 11.5 metres and the machine requires an area of 16 x 16 metres for revolving.

Tracking is done by hand using a simple but ingenious system — one person can operate up to five of these solar concentrators at the same time. The Solar Fire P90 is an open source design, but it can also be bought for about $ 12,000, excluding transport costs.

A video of the tests can be found here. For more information on the workings and applications of these kinds of machines, see the article “The bright future of solar thermal powered factories“.

Picture: Solar Fire.

Dog Sulkies: Pet Powered Mobility

dog sulkies

Dog owners looking for a more sustainable means of personal transportation should not look any further: the dog sulky is the answer. Dog powered vehicles have been used for the transport of goods and passengers in some European countries during the nineteenth and early twentieth centuries. Compared to those vehicles, the modern dogcarts offered by ChaloSulky promise to deliver a much smoother ride. The carts benefit greatly from the use of bicycle wheels, suspension and brakes. Moreover, the dogs are not confined between two shafts. Instead, only one shaft goes over the animals’ back, making the vehicle lighter and giving the dogs more freedom of movement.

[Read more…]

Pottery Refrigerators

Zeer potNgo Practical Action is working with communities to make zeer pots – very clever fridges made using clay, water and sand. They consist of two earthenware pots of different sizes, placed one inside the other. The space between is filled with damp sand that’s kept moist by adding water, and the smaller pot is filled with food. The top is covered with a damp cloth, then as the water in the sand evaporates towards the outer surface of the larger pot, there’s a drop in temperature of several degrees. This keeps the contents of the smaller pot cool. A zeer pot can keep 10kg of food fresh for up to 20 days.

More low-tech refrigeration.