Tihomir Čuljak
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...
Shepherds are people who have to go where sheep, goats, cattle and other animals they keep go. In this movement, they must spend days outside populated areas, moving through bushes, forests and karst....
In military vehicles in the war zone, the problem is mines are buried in the road. When a vehicle hits a buried mine, most of the mines explode in front of the front wheels above which the driver or p...
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...
Many people made a floating raft of plastic bottles. Empty plastic bottles are placed in nylon sacks, or nets. Wooden pallets are placed on this floating structure. This raft has a large load capacity...
In many parts of the world, people have built houses from the country. Fat earthy walls are excellent heat insulation, in summer they are comfortable, and in winter warm. Energy consumption for heatin...
Extensive breeding of ducks and geese on fishponds requires little investment. The duck and the geese are kept on the water during the day, while closing at night in the canopies. Canopies can be on t...
When a boat moves through the water it has to overcome a certain water resistance. Part of the resistance is formed on the bow where the boat penetrates through the water. The second part of the resis...
Excavators are machine that most often use for excavating canals, building foundations, and leveling the terrain. There are more and more work tools that can be placed on the hand of the excavator,...
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Tihomir Čuljak
