致命
发表于 2025-3-25 03:22:04
The Nature of Liquids and Gases,discussion—just like others to follow—may appear to be unrelated to the behavior of an airplane. Yet concepts such as pressure and phenomena such as the static behavior of water are relevant to the instrumentation used in wind tunnels and on airplanes.
dominant
发表于 2025-3-25 09:46:50
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infringe
发表于 2025-3-25 12:22:07
roadest sense. To put the science into its social context, the author describes (with many illustrations) the history of human attempts to fly and discusses the outlook for future developments, as well as the social impact of commercial aviation. Although only elementary mathematics is used, the und
Paraplegia
发表于 2025-3-25 19:17:07
A Dream Comes True: The Wright Brothers and Their Predecessors,ame a reality. By the toss of a coin on December 14, 1903, Wilbur Wright (1867-1912) won the first turn at piloting the powered airplane he had built with his brother Orville (1871-1948). The weather was beautiful, but the wind seemed insufficient for the Wright . to start from the 9° slope of the d
粘连
发表于 2025-3-25 21:05:08
Milestones of the Modern Age,ance of research in aerodynamics, design and construction of aircraft, development of engines, and all other aspects of aviation. The last chapter presented a selective survey of the early days of flight up to the beginning of this century. In this chapter, however, it will be impossible to trace th
avarice
发表于 2025-3-26 04:02:52
The Nature of Liquids and Gases,apter we will learn about some of the physical properties of ., a term that includes both gases and liquids. This broad expression is used, as we will see later, because the motion of objects in air and in water obeys identical laws until their speed approaches the speed of sound. Occasionally this
中止
发表于 2025-3-26 07:22:46
The Atmosphere of the Earth,height, but conventional flight is possible only in its denser layers. In fact, about 99% of the total mass of the air is found below about 40 km (25 miles). Commercial airliners fly considerably below this height at roughly 30,000 to 50,000 ft (9 to 15 km), with the supersonic Concorde going to abo
联想记忆
发表于 2025-3-26 11:53:29
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foppish
发表于 2025-3-26 13:54:54
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LAVE
发表于 2025-3-26 17:11:12
Aerodynamic Drag,t origin of these forces resulting from the complicated interplay of body shape, the properties of the fluid, and the flow speed, a pull is exerted opposing the direction of motion. As shown in Figure 1.1, the force experienced in the direction opposite to that of an airplane’s motion is called .. I