Wide Enough to Be Seen, Conductive Enough to Work Wire does the electrical job on a fence but it does not do the visual one. Stock walk into a single strand they cannot see, riders duck under it too late and drivers clip it with a mirror. A 40 mm woven poly rope solves both problems at once: the ...

Air Movement at Building Scale Small propeller fans move air around themselves. A fan with a 1.83 m blade moves the air in the whole building. That difference is what makes this unit worth its frame: at 345 rpm the blade tips run a long way per revolution but slowly per second, so the fan shifts a ...

Covered Troughs Keep Water Cleaner for Longer An open trough collects whatever the wind delivers: dust, leaves, feathers and the occasional rodent. Each of those adds organic load, and organic load is what turns a clean basin into a green one within a fortnight. What the cover and balls do The ...

One Cow, One Bucket, One Simple Machine Not every dairy needs a pipeline. On smallholdings, in tie-stall sheds and on farms that milk a few cows at a time, a single bucket machine gets the job done with the least equipment and the least cleaning. How the set works The vacuum pump draws air from the ...