Scarecrow garden with plastic bottles
Rotating even from the mesmer wind windmills are "decoration" of many household plots. The appointment of their very utilitarian - noise of propeller to drive away from the plot of moles and other rodents, which sometimes ruin the roots of fruit trees and shrubs. The design of such windmills is an uncomplicated wooden block-cross-earther stripped on a long stick, at one end of which a wooden or tin propeller is spinning, and a plywood keel is installed on the other.
It is not so difficult to make such a device, but for the site there will be no less than a dozen, and there will be a lot of time for it. Yes, and serves such a windmill no more than one season: the woods are breathtaking, crack - and the propeller ceases to rotate.
On my site, now for several years, rotary windmills have been completely successfully noisy, which are literally made of anything - plastic bottles and aluminum cans from under carbonated drinks.
Although it is very simple to make such windmills, work, however, requires known accuracy. For the beginning, cut out of a thick paper pattern-scanner of the cylindrical part of a 2-liter bottle with windows - their size and location are selected depending on the size of the bottle. With the help of the marker marker, the windows contours are transferred to the surface of the bottle, the holes in their corners are adjusted by the holes, After that, sharp scissors in three sides of each of the windows are made slots. It remains to bend "sash" by 30-40 degrees- and the windmill - the rotor is ready.
To ensure the rotor free rotation, the bottle cork center is adjusted with a diameter of about 2 mm and the wire axis is introduced there with a pair of glass beads. The ends of the axis are raised by ringlets. Here, in fact, all.
Finished windmills-rotors are suspended on the branches of fruit trees, while I recommend using not twine, but a steel wire that allows you to transmit vibration from the rotating rotor much more efficiently. If necessary, you can use garlands of two, three or four rotors, having trailing them to each other. To do this, in each long wire axis you need to skip through the holes in the traffic jam and the bottom. In principle, rotating garlands can be switched not only vertically, but also horizontally, from the pole to the sixth.
Even more noise is obtained from wind turbines-rotors made from large beer aluminum cans. Make from them rotors as simple as from plastic bottles.