| |
The question has often been asked why the Wright brothers were able to succeed in an effort in which so many others had failed. ... Attempts to achieve manned flight in the early nineteenth century were doomed because the stream engines that powered the aircraft were too heavy in proportion to the power that they produced. But by the end of the nineteenth century, when the brothers were experimenting with engineering options, a relatively light gasoline engine had already been invented, and they were able to bring the ratio of weight to power within acceptable limits for flight.
――摂南大学 法・国際言語文化・経営情報・工学部（１月30日実施）――2004年
|
|
- 06/8/27(日) -
