Archimedes Screw  - Design and Construction Archimedes' Water Screw
Archimedes Screw  - Design and Construction Archimedes' Water Screw
Archimedes Screw
Design and Construction Archimedes' Water Screw

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Gravity Power
Achimedes ScrewInvented in Egypt by the ancient Greek mathematician Archimedes, the Archimedes Screw , or water screw , as it is commonly known, was used for irrigation and lifting water from mines and ship bilges. It is still used today, unchanged from its ancient Egyptian form, for irrigation and forms the basis for many modern industrial pumps. 


In his De Architectura, Book X, Chapter 6 ,The Water Screw , the ancient Roman engineer and historian,  Vitruvius, explains the design and construction of the Archimedes Screw

There is also the method of the screw, which raises a great quantity of water, but does not carry it as high as does the wheel. The method of constructing it is as follows.

1.  A beam is selected, the thickness of which in digits is equivalent to its length in feet. This is made perfectly round. The ends are to be divided off on their circumference with the compass into eight parts, by quadrants and octants, and let the lines be so placed that, if the beam is laid in a horizontal position, the lines on the two ends may perfectly correspond with each other, and intervals of the size of one eighth part of the circumference of the beam may be laid off on the length of it. Then, placing the beam in a horizontal position, let perfectly straight lines be drawn from one end to the other. So the intervals will be equal in the directions both of the periphery and of the length. Where the lines are drawn along the length, the cutting circles will make intersections, and definite points at the intersections. 

Archimedes Screw layout and construction2.    When these lines have been correctly drawn, a slender withe of willow, or a straight piece cut from the agnus castus tree, is taken, smeared with liquid pitch, and fastened at the first point of intersection. Then it is carried across obliquely to the succeeding intersections of longitudinal lines and circles, and as it advances, passing each of the points in due order and winding round, it is fastened at each intersection; and so, withdrawing from the first to the eighth point, it reaches and is fastened to the line to which its first part was fastened. Thus it makes as much progress in its longitudinal advance to the eighth point as in its oblique advance over eight points. In the same manner, withes for the eight divisions of the diameter, fastened obliquely at the intersections on the entire longitudinal and peripheral surface, make spiral channels which naturally look just like those of a snail shell.

3.    Other withes are fastened on the line of the first, and on these still others, all smeared with liquid pitch, and built up until the total diameter is equal to one eighth of the length. These are covered and surrounded with boards, fastened on to protect the spiral. Then these boards are soaked with pitch, and bound together with strips of iron, so that they may not be separated by the pressure of the water. The ends of the shaft are covered with iron. To the right and left of the screw are beams, with crosspieces fastening them together at both ends. In these crosspieces are holes sheathed with iron, and into them pivots are introduced, and thus the screw is turned by the treading of men. 

4.    It is to be set up at the inclination corresponding to that which is produced in drawing the Pythagorean right-angled triangle: that is, let its length be divided into five parts; let three of them denote the height of the head of the screw; thus the distance from the base of the perpendicular to the nozzle of the screw at the bottom will be equal to four of those parts. A figure showing how this ought to be has been drawn at the end of the book, right on the back. I have now described as clearly as I could, to make them better known, the principles on which wooden engines for raising water are constructed, and how they get their motion so that they may be of unlimited usefulness.

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Archimedes Water Screw PlansBuild an Archimedes Water Screw in just one night with our easy, step by step plans and instructions.

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Invented in Egypt by the ancient Greek mathematician Archimedes , the Archimedes Screw , or water screw , as it is commonly known, was used for irrigation and lifting water from mines and ship bilges.  The water screw works wonderfully for science and history class assignments and science fair projects.

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Inspired by the great war machines and siege catapults of Leonardo da Vinci , this all Red Oak hardwood trebuchet features an open counterweight cabinet for range and trajectory adjustment. 

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Archimedes Screw  - Design and Construction Archimedes' Water Screw

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