Tihomir Čuljak
Ships have been using wind power for hundreds of years. After the invention of the steam engine, and later the internal combustion engine, wind power was used only for sport and family sailboats. Deve...
Sailboats are vessels or boats powered by power wind. In the past, they were the most common type of vessel, while today they are used most on recreational yachts and sports vessels, but more recently...
The sails on today's sailing boats most often have a triangular shape. The surface of a triangular sail is twice smaller than a square sail of the same height and width. By placing square sails on...
In the last 15 years I have made several models of this wind turbine. On each model I tested some other circuits, or variants of assemblies. A list of shots can be seen here. I also wrote a book about...
On this new model of wind turbine with sails, I made some improvements that allow much easier installation, lifting, or later lowering in case of failure or servicing. For that I had to make changes t...
Compressed air is pressure-pressurized atmospheric air, which is used as a means for transferring and storing energy. When the air is pressed, its temperature rises. This temperature must what be remo...
Aerosol bombs are weapons that have been used in the war for decades. These are bombs that expel explosive gas that is explozsion blown up after blasting and causes a strong explosion. Compared to th...
Many people in the world occasionally made the boats on which they set their sailing gardens. Such gardens are usually very expensive. Some primitive peoples living in swampy areas have also made floa...
Для риття неглибоких каналів для посіву або відведення води з поля найчастіше використовують плуги, які тягнуть транспортні засоби, що рухаються перед каналом. Для риття глибоких каналів або військови...
Mixed household waste is most often disposed of in landfills, and in some cases it is burned in thermal power plants for energy production. Such waste usually contains up to 30 percent plastic. The pl...
Tanks are mobile cannons whose goal is to quickly penetrate enemy territory and destroy as many enemy combat assets and personnel as possible with their fire. Armored vehicles aim to reach the battle...
Household waste contains a large percentage of materials that can melt at high temperatures. These are various fats, wax, paraffins, paints, glues, some types of plastic, soldering iron, and the like....
In war, trenches on the front line are usually dug by hand. Those located a few kilometers behind the front line are usually dug with large excavators and backhoes. The simplest tool for digging a tre...
There are several ways to clear minefields. In peacetime, deminers do this work, first with machines that activate the minefield, and then manually checking whether any mines are left. If there are mi...
За останні десять років дрони перетворилися з іграшок і сільськогосподарських інструментів на дуже важливе військове обладнання. Вони використовуються для розвідки, а також для нападу на наземні, морс...
Landing ships have the ability to run aground without damage on sea or river shores, but they cannot go ashore. This problem can be solved by adding the ability to move on the ground to the ship. The...
I have been doing earthworm farming as a hobby for 40 years. I experimented with different breeding technologies and fed them with different types of food. Earthworms are the best gardeners. They prod...
A snow blower is a machine that has a bucket at the front with rotating blades that throw snow towards the middle of the bucket. This crushed mass of snow is picked up by a spiral screw that lifts the...
There are several ways to generate energy from waves. Most of these devices float on the surface of the water at sea, lakes, or rivers, and energy is generated by moving up and down. Inside most of th...
Hipersonic rockets travel from 6 to ten times faster than sound. And anti-missile missiles consisting of so-called "missile shields" can shoot down enemy missiles traveling up to three times the speed...
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