Technology for Luddites
The Table Top Wool Wagon is among the largest animal-drawn road vehicles ever built. It was a unique Australian invention, built to transport wool from sheep farms to train stations and harbours.
As many as forty bullocks, or thirty horses, pulled the vehicles over distances of up to 1600 km.
Table Top Wool Wagons (also known as “jinkers” or “ships of the desert”) appeared at the end of the nineteenth century and remained in use until the 1920s, when they were replaced by trucks.
The rolling friction of the tyres is the main resistance acting on a bicycle at speeds below 10 km/h (6 mph). At higher speeds, air resistance becomes far more important. It accounts for more than 80 percent of the total force acting to slow the vehicle at a speed of 35 km/h (22 mph). At this speed, it would take a power output of 345 watts just to overcome air drag when riding an upright commuting bike (on a level road in calm conditions). Riding a velomobile (a recumbent cycle with a fairing) can lower air resistance dramatically, reducing power to overcome drag to about 30 watts at a speed of 35 km/h.
However, velomobiles are expensive. A much cheaper option is the use of a partial fairing. These wind screens, made of shatter resistant polycarbonate plastic, are mounted at the handlebars. A partial fairing is placed so that the rider is able to see over it, not through it. Apart from reducing air resistance, it is also an effective shield against bugs, rain, cold air, and road debris.
Partial fairings are available for different types of upright bicycles, and for recumbents. They weigh between 600 grams and 1.5 kg, depending on the model, including mounts. These accessoiries, which can often be seen on motorcycles, are relatively unknown to cyclists, mainly because they are outlawed in conventional bicycle racing.
When used in combination with a road bike in touring position (with the hands on the handlebar), a partial fairing brings the power required to overcome air resistance at 35 km/h down to 157 watts. This compares to 220 watts for an unfaired road bike in touring position, and to 176 watts for an unfaired road bike in (a much less comfortable) crouched position and wearing tight clothing. A partial fairing on a road bike thus offers a similar advantage to that of an unfaired recumbent (148 watts). With a headwind, the advantage of improved aerodynamics becomes even larger. One disadvantage of fairings is their sensitivity for crosswinds gusts. It takes some practice to get used to them.
The numbers above were taken from “Bicycling Science” (third edition), by David Gordon Wilson, pp 188. The result for the partial fairing concerns an older model, so it might be an underestimation. Picture: a small partial fairing by Zzipper.
“It is authoritatively stated that the building and maintenance of the farm fences in the United States have cost more than the construction of the farm buildings. Be this as it may, while large numbers of works have been written upon rural architecture we believe this is the first publication specially devoted to Fences, Gates and Bridges.
It aims to be a practical work, showing the “evolution” of the fence from the road barrier of logs, brush or sods to the latest improved forms of barbed wire. The numerous illustrations are mainly representations of fences, gates, etc., in actual use. The chapter on fence law is necessarily condensed. The various judicial decisions upon the subject alone would fill a large volume. This little work, the first and only one of its character, is given to the public in the confident hope that it will prove specially useful to farmers and village residents.”
“Fences, gates, and bridges; a practical manual“, George A. Martin, 1892. Thanks to Rob McWilliam.
“Shelters, Shacks, and Shanties presents lively, step-by-step tutelage
on building all types of temporary and long-term accommodations from both natural and man-made materials. Published in 1914, this practical classic is as essential a guide for today’s modern homesteader as it was at the turn of the twentieth century.
Included are instructions for dozens of worry-free shelters for you to chose from, including a sod house for the lawn, a treetop house, over-water camps, a bog ken, and much more. Satisfying the builder’s need for the creature comforts of home, it also provides tips on how to build hearths and chimneys, notched log ladders, and even how to rig a front door with a secret lock. Illustrated throughout with a bounty of helpful line drawings, Shelters, Shacks, and Shanties harkens back to the can-do spirit of the American frontier that still thrives today.”
Shelters, Shacks, and Shanties; and how to build them“, D.C. Beard, 1914 (Gutenberg free e-book). The description is from the 2008 edition (Amazon). Thanks to Thurston.
Under good climatic conditions and using specific technology, the full moon can be a powerful source of light.
Using technology inspired by solar energy concentrators, the “Full Moon Theatre” lights its performances using only moonlight. Moonbeams are collected, concentrated, and focused on stage.
The original Full Moon Theatre was built in Southern France and their plan is to create twelve Full Moon Theatres worldwide.
“Our mattress is worn out. We need a new one, but I’ve been dreading buying a new one. I don’t like the waste of it all: The ignoble dragging of the old mattress to the curb. The prospect of sleeping on a brand new construct of toxic foam and fire retardants… In Greece, Italy and France mattresses are made by local craftsmen, and are stuffed with 100% wool. These mattresses basically last for life. When the wool gets compressed the mattress guys will empty it out, fluff it up, and re-stuff it, adding more wool if necessary.” [1]
“The bed Mary bought was made by Signor Oldani, a Milanese bed-maker and upholsterer. He made beds the Italian way, and the way we used to make mattresses in England before the introduction of short-lived internally sprung ones.
The beauty of the mattress is that when it needs a wash, the wool can be pulled out, stuffed, in batches, into pillow cases, put through the washing machine and after drying, carded back into fluffy pile before being returned to the mattress cover.
Every few years, it needs to be re-carded, as the wool slowly compacts, says Mary. In Italy during the summer, the mattress man, il cardatore, tours Italian homes, pulls out the wool from their mattresses, re-cards it, adds some more, as the process reduces the stuffing a bit, rebuttons and then sews the mattress cover back up again. Mary submitted her mattress to this process four times.” [2]
“Totally by chance, I found two places in Paris that still make their own 100% wool mattresses by hand… It was ready two days later. They told me to come back in 10 years to have the mattress redone: they pick it up in the morning, take out the wool stuffing, clean and refluff it, put a new cover on it, and then deliver it back to you before bedtime.” [3]
Read more: 1 / 2 / 3. Via Root Simple.
