波音787 窗口大很多 机身用炭纤维 微创新=省油20% 没颠覆创新
最近免费坐波音787，窗口大很多，机身用炭纤维：气压和湿度增加，我飞十几小时看电影看报看电脑，眼睛没以前模糊/干燥，厕座板在冲洗前自动放下，还有很多微创新，但没飞跃性的创新。民航飞机速度这几十年毫无增长,如果可像CPU这几十年加速就好了！周三四广深沙龙,请Webplus.com>论坛>广深沙龙留言报名@真的是若辰同学:这个说的就太外行了。去查查787飞一年洲际航线能省下多少钱的燃油吧//@老牟的微博:您可知道这飞机的碳纤维外壳的胶水正是PU高分子树脂才能获得比湿式碳纤维更轻的重量，比干式碳纤维更简易的制造工艺？材料学上的一点点突破就能带动的变化,您这次一定要好好感受一下
唐：微创新=省油20%！
@真的是若辰同学
唐：我学物理，也去过美国很多航空博物馆详细了解历史不同引擎微创新，我知道发动机颠覆性创新很困难。登月后70年代预测很快会移民火星，可太空旅游，但如今还没实现梦想。我们还是停留在化学发动机的技术，民航还没超越音速。Ion发动机是创新，但加速太慢，不适合民航！下周三四广深沙龙
@lfkkxl:你是学物理的,应该知道音爆吧！这冲击力不是所有人能承受的,所以民航超音速飞行现在还不大可能。另外超音速巡航油耗大增加,机票贵好几倍,飞行里程大缩减
唐：耗油量大是对的。但你误解，超音速飞机里的人是感觉不了任何音爆，机外的人才会感受到音爆，但离地100英尺音爆的F15对地上的人也没伤害！
Some common myths about sonic booms and supersonic travel:
http://depletedcranium.com/understanding-sonic-booms/
[*]There is a “sound barrier” that was broken or is broken by aircraft - There really is no “barrier.”It is simply an issue of whether an aircraft is designed in a manner that makes it capable of maintaining stability and control as it approaches and exceeds the speed of sound.Early aircraft did not have swept wings, had large props and were generally not aerodynamically compatible with such speeds. This belief may be the result of an early misunderstanding of the Prandtl–Glauert singularity, which would predict pressures to become infinite at the speed of sound. However, the Prandtl–Glauert transformation does not apply at such speeds, so the prediction of infinite pressure is false.
[*]A sonic boom is experienced as a violent phenomenon on board the aircraft – If flying at supersonic speeds, a passenger on the aircraft would have no indication of the sonic boom other than the airspeed indicator. The plane travels with the boom, so it is perfectly smooth.
[*]An aircraft flying at supersonic speeds creates a violent and damaging sonic boom – As stated above, this is not usually the case.At low altitude, it may break large plates of glass, but at higher altitudes, even this will not happen.It will not produce any physical injury to humans, although it is loud enough to cause some hearing damage, although usually not from one incident.At high altitudes, it will produce no danger of damage to hearing.At worst, it is an annoyance.
[*]A visible cloud of condensation indicates that an aircraft has gone supersonic – The pressure generated by a fast-moving aircraft can compress the air enough to force moisture to condense, producing a visible cloud. However, this does not really have anything to do with supersonic travel.Such clouds do sometimes occur at or near Mach-1, but they can occur at lower speeds too. It depends on atmospheric conditions.
[*]There is a sudden change in flight characteristics at Mach 1 – There are differences in the flight characteristics of supersonic versus subsonic flight, but it does not happen all at once. This is largely due to the fact that as an aircraft approaches the speed of sound, portions of the aircraft will experience supersonic air flow before the entire aircraft actually exceeds the speed of sound.
@颜竞-Aqueous-Battery:787这种工程可不是国内一些抄抄补补的所谓创新可以相提并论的，是顶级科研团队十几年努力，加上各领域突破性进展才能搞出来的。省油20%绝对是统治地位的技术优势。//微创新=省油20%!
唐：谁可以发明下一代颠覆性的发电机,电池或发动机，不仅可获诺贝尔和巨额财富，还可以统治世界！
@颜竞-Aqueous-Battery:诺贝尔和财富应该不是问题，即使在中国。统治世界是扯淡，即使在崇尚发明的美帝也绝无可能。爱因斯坦也没见的统治世界
唐：爱因斯坦发明理论，但爱迪生发明产品=灯泡，他留下的GE还很伟大！当然不可只凭一个发明统治世界，但统治世界的帝国要有很多颠覆性的发明！周三四晚广深沙龙
@老牟的微博:这是个很系统的工程，理论和学术论文上行得通的有很多，但是真能实施就涉及非常广的技术范畴，想以一人之力去完成这种颠覆性的发明，是不可能的事！换个角度从人类发展史看，近代史西方工业文明发展史有一段时间远远高于亚非拉地区，但是至今也没能统治世界，人的因素比科技的因素更为重要
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