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Who invented the first helicopter?

It was constructed by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation, and successfully piloted by the inventor himself on May 13, 1940, following an initial tethered test of only a few seconds in September of the previous year.Following its successful free flight, the VS-300 became the standard for helicopter manufacture around the world. Earlier versions of the helicopter, all unsuccessful, had included Thomas Edison's, which had a volatile gun cotton-powered engine, and Louis Charles Breguet's Gyroplane #1, which was likened to a bunch of windmills lashed ..

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What factors led to the fall of the Aksum?

Based on local stories, there are other theories regarding the decline of the Aksum. Ethiopian lore holds that the Aksum civilization was defeated by the Jewish Queen Yodit, while another theory claims that the empire's fall was caused by the southern pagan queen Bani al-Hamwiyah.

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Who invented the cardboard box?

Gair's invention made the mass production of cardboard boxes easy, since he only had to cut and crease flat pieces that could later be folded. His invention was further advanced when flaked cereals were developed, and it was the Kellogg brothers who became the first company to use pre-cut cartons to package their cereals.

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What type of government did ancient China have?

Ancient China was under a dynastic rule where emperors from the same family ruled for generations. Dynasties from different regions often competed for supremacy to control China's resources and territories. The king of the dominant dynasty became the emperor, who ruthlessly implemented the law and formed massive labor forces. The emperor recruited vast armies to dissuade barbarians from invading their lands and to keep internal conflicts at bay.

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Who was the only U.S. President to never marry?

James Buchanan was the 15th president, serving only one term from 1857 to 1861. Though he was a lifelong bachelor, he became Harriet's guardian when she was only 11 years old. He had been very active in government affairs for years before running for president but came into office just as the nation's divisiveness over slavery was reaching its height. Despite his efforts to keep the nation together, seven states seceded from the Union under his presidency.

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How did the cotton gin affect slavery?

Because removing the seeds from the cotton once it was harvested was a tedious task, it was difficult to produce cotton quickly and the crop rarely made money.\n\nWith Eli Whitney's invention, cotton lint could be produced quickly and efficiently at up to 50 pounds per day. Plantation owners found they needed more slaves in the field to meet the increased ability of the gin. While the task of operating the gin was far less painful, the increased demand for slaves resulted in slavery raising from around 700,000 slaves in the years before its invention to nearly double that in the next two ..

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How did the Compromise of 1850 lead to the Civil War?

Organized and championed by Henry Clay, the Compromise of 1850 was a series of laws and policy enactments that formed a comprehensive new national policy toward issues of slavery and westward expansion. At the core of this debate was the question of whether or not frontier territories should join the Union as new slave states. Southern states preferred an expansion of slavery into new territories, whereas northern states argued in favor of abolishing slavery in any new states. The Compromise of 1850 determined that new states would be slave-free, and the slave trade was also abolished in Washi..

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What was the result of the Whiskey Rebellion?

In 1791 the federal government was in debt, having assumed all Revolutionary War debt for the states. To help pay this debt, Congress approved an excise tax on distilled spirits. The tax was assessed based on the capacity of the still. It varied from six to 18 cents per gallon and had to be paid in cash. This was the first nationwide internal revenue tax, according to the U.S. Alcohol and Tobacco Tax and Trade Bureau.\nWest of the Appalachian and Allegheny mountains, whiskey was often used as currency. Many farmers converted their crops to whiskey because it was easier to transport than grain ..

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What are some facts about Philip B. Downing?

Philip Downing's street letter box influenced and expanded the mail system in the United States. He also patented an electrical railroad switch that allowed workers to power off specific trains when needed. His design influenced later inventors who created electrical switches capable of controlling lights in buildings such as houses and offices.

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What idea is the policy of assimilation based on?

As the nation expanded, the government decided that it needed to regulate the trade activity of Native American tribes and their interaction with white settlers. The U.S. government also created a special bureau to monitor and negotiate between Native Americans and white settlers in the event of disputes. Native Americans, however, did not see themselves as part of the newly formed United States. They viewed themselves as sovereign nations that were not subject to governmental control.\nAs the Native Americans continued to resist government efforts to assimilate them, the U.S. government alter..

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