There is some evidence that before the arrival of the camel, which was introduced into Africa via Egypt at the time of the Arab conquest, bullocks were used either as pack animals or to draw carts from the northern countries across the Sahara to the gold-producing areas of the ancient Sudan. From the 16th century onward the … Continue reading Animal Transport in Africa
Category Archives: Alemdaroğlu Group
How to Select the Appropriate Gearbox ?
When considering a gearbox, many factors need to be considered to meet specific application requirements: Gear Ratio Gear ratios are defined as the correlation between the numbers of teeth of two different gears. Commonly, the number of teeth a gear has is proportional to its circumference. This means that the gear with a larger circumference … Continue reading How to Select the Appropriate Gearbox ?
Transportation in Africa
There were highly developed transport networks in many parts of Africa in precolonial times, and, during the colonial era that followed, these networks were restructured to penetrate into the interior from the seaports and, in the main, to serve the commercial and administrative needs of the colonial powers. Their fragmentation, which led to interregional links … Continue reading Transportation in Africa
Power Sector in Africa
A spectacular development in the use of electric energy took place in the second half of the 20th century, partly because of the growth of the petroleum industry and partly because of the establishment of large hydroelectric plants and some thermoelectric plants. The increased quantity and quality of electric energy gave rise to problems of transmission and … Continue reading Power Sector in Africa
Spur Gearbox
Spur gears are made with straight teeth mounted on a parallel shaft. The noise level of spur gears is relatively high due to colliding teeth of the gears which make spur gear teeth prone to wear. Spur gears come in a range of sizes and gear ratios to meet applications requiring a certain speed or … Continue reading Spur Gearbox
Principal Crops in Africa
Cereals and grains Africa produces all the principal grains—corn, wheat, and rice—in that order of importance. Corn has the widest distribution, being grown in virtually all ecological zones. Highest yields per acre are recorded in Egypt and on the Indian Ocean islands of Réunion and Mauritius, areas where production is under irrigation. Millet and sorghum are also produced … Continue reading Principal Crops in Africa
Helical Gearbox
Helical gears are cut at angles which allow for gradual contact between each of the helical gear teeth. This type of innovation provides for a smooth and quiet operation. Gearboxes using helical gears are applicable in high horsepower and efficient applications. Physical Properties Helical gears are typically constructed from cast iron, aluminum allow or iron … Continue reading Helical Gearbox
Agriculture in Africa
Agriculture is by far the single most important economic activity in Africa. It provides employment for about two-thirds of the continent’s working population and for each country contributes an average of 30 to 60 percent of gross domestic product and about 30 percent of the value of exports. Nonetheless, arable land and land under permanent … Continue reading Agriculture in Africa
Biological and Botanical Resources
Africa’s naturally occurring biological resources—its immensely varied vegetational cover, vast insect life, and diverse animal life—have been described above. When combined with cultivated crops and domestic animals, these resources represent the great bulk of the continent’s economic wealth. The two most economically important types of vegetation are forests and grasslands. Among the forested areas, the tropical forests contain much of … Continue reading Biological and Botanical Resources
Working of a principle gear box
In a gear box, the counter shaft is mashed to the clutch with a use of a couple of gear. So, the counter shaft is always in running condition. When the counter shaft is bringing in contact with the main shaft by use of meshing gears, the main shaft starts to rotate according to the … Continue reading Working of a principle gear box