Wright Brothers
2015-08-30 来源: 51due教员组 类别: 更多范文
51due论文代写网精选代写范文：“Wright Brothers ”。本篇论文主要讲述了Wright Brothers 是如何从开始对飞翔产生兴趣到最后发明飞机，自己试验飞机，不管遇到多大困难，他们都没有放弃。他们为世界贡献了一个绝无仅有的航空运输系统，改变了人们的生活。
The Wright Brothers were two intelligent young men at an early age. Orville and Wilburs parents were extremely education oriented. Two libraries in their house supplied them with knowledge at the start of their lives. Orville once said We were lucky enough to grow up in an environment where there was always much encouragement to children to pursue intellectual interests; to investigate whatever aroused curiosity They thought highly of mechanics even in childhood. They sometimes sold mechanical toys for pocket money. They formed the Wright Bicycle Company in 1892.
In 1894, their interest in flying was inspired by the gliding flights of the German pioneer Lilienthal. They studied all that was known on the subject at that time. Orville said that soaring birds kept control of the flight by flexing the tips of their wings. Beginning with a biplane kite in 1899, they began on what was to become a difficult journey to success. They were going to follow a careful scientific approach to flight. They first built a practical wind tunnel, tested more than 200 wing shapes and sizes, and decided to construct and test many gliders before attempting powered flight. From the results of their tests, the brothers made the first reliable tables of air pressures on curved surfaces. These tables made it possible for them to design a machine that could fly.
In 1901 and 1902, they chose the sand dunes of Kill Devil Hill, North Carolina, because of its constant winds and soft sands to prevent injuries. Also, the Weather Bureau, now the National Weather Service, told them that this area would be fine for testing. Through these experiences they taught themselves to fly, control flight altitudes, and develop the parameters for their powered machines. This glider could carry one person and it measured 16 feet from wing tip to wing tip. Now, they had a bigger glider to go back to Kitty Hawk. They showed that they could control sidewise balance by positioning the tips of the right and left wings at different angles in the wind. But it still did not have the lifting power they hoped for. Before leaving Kitty Hawk in 1902, the Wright Brothers started planning the power airplane. By the fall of 1903 they finished building a airplane that costed less than $1000. It had wings 40 and a 1/2 feet long and weighed 750 pounds with the pilot. On December 17th 1903 at Kill Devil Hill, the brothers became the first men to make sustained, controlled, powered flight. Orville made the first four flights for a distance of 120 feet. On Wilburs fourth flight, he went 852 feet. These two brothers working as a close team had, in a couple years, achieved what many thought was impossible. After returning to their home in Dayton, they made 105 flights that added up to only 45 minutes in the air. Two flights lasted five minutes each. On October 5th, 1905, the machine flew 34.2 miles in 38 minutes and 3 seconds. The Wrights first offered their machine to the U.S. government but were not taken seriously. By 1908, they made a deal with the U.S. department of war for the first military airplane.
They continued with flight experiments near Kitty Hawk and newspapers were all over that. Shortly after those experiments, Wilbur went to France where he was cheered by thousands. He made flights to altitudes of 300 feet or more, and arranged with a French company for the construction of his airplane in France. He then returned to the United States. He did demonstration flights around the Statue of Liberty, up to Grants tomb, and back to Governors Island. While Wilbur was in France, Orville made successful flights in the United States. On the morning of September 9th, 1980, he made 57 complete circles at an altitude of 120 feet over the drill field at Ft. Myer, Virginia. He stayed in the air one hour and two minutes and set several records that same day.
On September 17th, however, while flying at 75 feet, a blade of the right hand propeller hit and loosened wire of the rear rutter. The wire coiled around the blade and snapped across the middle. The plane became hard to steer and fell to the ground. Orville had a broken leg and two broken ribs. His passenger died within three hours with a fractured scull. This was definitely the most serious accident in the Wright Brothers career! Orville returned to Ft. Myer one year later and completed official tests without signs of being nervous. Wilbur died of Typhoid Fever on May 30th, 1912 just as the airplane was beginning to make great advances. Orville continued to work alone and in 1913 won the Collier Trophy for a device that balanced airplanes automatically. He sold his share in the Wright Company and retired in 1915. He continued to work on the development in his own shop. To the brothers alone belongs the credit and honor for giving the world flight. They have given the world a great air transportation system, aerospace industry and airpower for defense. Their dedications serve as role models to us all. -w
51Due网站原创范文除特殊说明外一切图文著作权归51Due所有；未经51Due官方授权谢绝任何用途转载或刊发于媒体。如发生侵犯著作权现象，51Due保留一切法律追诉权。
资金托管
51Due将让你达成学业目标
积累工作经验
多元化文化交流
专业实操技能
建立人际资源圈
