How to Build a Spiral Pump

spiral pump

“A spiral pump, first invented in 1746, has been recreated and tested at Windfarm Museum using lightweight and inexpensive modern materials. A 6 foot diameter wheel with 160 feet of 1-1/4 inch inside diameter flexible polyethylene pipe is able to pump 3,900 gallons of water per day to a 40 foot head with a peripheral speed of 3 feet per second.

With its low torque requirements, the pump is particularly suited to be mounted on and driven by a paddle wheel in a current of two feet per second or greater. This easily built, low maintenance spiral pump can be used to provide water without the need for fuel wherever there is a flowing stream or river. It can also be hand turned or otherwise driven to provide a low cost, efficient pump.”

Read more: 1 / 2 / 3 / 4. Thanks to Paul Nash.

See also:

What’s the Amish community’s stance on cars?

“To the extent that you are mobile in an automated or motorized way with something like a car or motorcycle or fast moving tractor, you’ve increased your radius of contact with other human beings, but at the same time you dilute the quality of contact within that radius.

So you can have more contact with a lot more people, but the quality of your relationships with those people, especially the people who are your immediate neighbors, is diluted. You don’t rely on them as much. It really drastically undermines the community.

The Beachy Amish — that’s a sect within the Amish — they decided to adopt cars. Then most of the young people left the group because they got exposed to the rest of the society and — poof! — they’re gone.”

Read more: Despite horses and buggies, Amish aren’t necessarily ‘low-tech’.

DIY Heirloom Technology

Heirloom technology at makeprojects.com. Small collection for now.

Barbers are Back

Barber In France, a profession that until recently seemed a sure victim of disposable razors, is suddenly on the comeback trail. New barbers are opening up shop every day, and the shaving ritual is again being adapted to current tastes. In the French capital, people have started emulating the classic Alain Maître Barbier (Alain, the Master Barber), a shop situated in the Marais district. Two new Les Mauvais Garçons (The Bad Boys) barbershops have recently started greeting customers, on rue Oberkampf and in the BHV department store for men.

The only major obstacle standing in the way of rapid expansion is the difficulty in finding qualified staff. The art of being a true barber is not as straightforward as it might seem. First, aspiring barbers must learn how to properly use a straight razor, by practicing on rubber balloons. But mastering the blade is not enough for becoming a true “saloner,” says Michel Dervyn. “These are professionals who, having made their career in the barber trade, have acquired the art of conversation.”

Barber movements 2 Is all of this just a passing fad? Maybe, but apart from the quality of the result – which is far superior to a bathroom shave at home – going to the barbershop also expresses men’s desire to “get together and pass down the ritual to the next generation,” says Michel Dervyn. “Men are often accompanied by their sons or grandsons,” he notes. After years of forced integration of the sexes, the barbershop is once again a place where “men come to socialize. It is like English clubs or tailor shop,” says Hélène Capgras, a consultant at Brain for Beauty. “It is a place where men go without their wives.”

Source: “In France, barbers are back“. Original article “Le Retour des barbiers“.

Related: “Exercices for barber apprentices“, Arthur Mole, 1917

Home Made Air Conditioner

Low-tech cooling2 From the comments:

“How about using the toilet tank? In the US all accept the most expensive low water toilets have a large enough tank. This would eliminate the cooler, the water would circulate avoiding unwanted mold/bacteria, each flush would bring in cool water, and the pump and cold packs would reduce water usage.”

“So, would you want me to make a looped system using a toilet tank as a source of constantly cool water?”

“I freaking love this idea.”

“It’s entirely doable, if you’re willing to have a decent length of tubing running through your house. It might be a great way to cool a bedroom thats near a bathroom though… Great Green idea!”

Home Made Air Conditioner at Instructables.

European Urbanization 1500 – 1800

Population european cities 1500 1800
Quoted from: “European Urbanization 1500-1800“, Jan de Vries, 1984.