飛機一般飛行的高度是多少

一般民航機的飛行高度約為10 000公尺。


相信大家也十分欣賞在飛行時望向窗外的雲海景象。通常一般的雲層對飛行中的飛機影晌不大，因為在一般民航機飛行高度(通常在二、三萬呎)的雲層巳經十分稀薄。不過當有雷暴雲團產生時，雲層便發展得很高，而和雷暴相關連的壞天氣，例如，閃電、雷擊、積冰和冰雹等現象都對飛行有一定的危險。不過，現今的飛機設備先進，飛行人員又可以透過氣象預報去了解壞天氣出現的地方，從而作出準備。如有必要，飛機可以改變航道，以避開最惡劣的天氣情況。所以，雷暴為航機帶來的危險是可以避免的。

http://www.hko.gov.hk/education/newsarticle/000531.htm


飛行器在美國堪薩斯州薩萊納機場起飛，當爬升至15240公尺高度（一般民航機高度為10668公尺），擠身在細小駕駛艙的福塞便可順隨噴射氣流滑行，有如搭便車般輕鬆又省油。

http://www.singpao.com/20050222/international/678061.html

2007-03-23 18:27:35 補充：
英国帝国理工学院的科学家罗伯特。诺兰等人经过研究，提出了一个解决方案-- 降低民航机飞行高度。他们认为，视天气情况而定，当飞机的飞行高度从33000 英尺降低到24000-31000英尺之间时，将不会产生凝结尾迹。http://www.t7online.com/feature/news231002.htm

2007-03-23 18:33:12 補充：
參考以下網址的附圖：飛機飛行的高度就在「對流層」頂。http://ihouse.hkedcity.net/~hm1203/atmosphere/air.htm

No, cruising at 40,000ft isn't rare at all. In fact the majority of modern jet airliners is certified to fly above 40,000ft and it's particularly common on long-haul operations where flying at higher altitude will achieve better fuel consumption and engine performance. For example from Sydney to Hong Kong, Cathay's A333s typically operate at the range of 35,000 to 41,000ft. With the initial altitude at 33-35,000ft, they gradually climb to 39-41,000ft at mid-way depending on the direction. Then all the way to the top of descend point.

But most jet operations are constrainted below 45,000ft due to the extra-terrestrial ionising radiation issue. The only regular public transport operations of jet airliners at the altitude above 45,000ft in history were operated by Concorde due to the need of leaned air density and more stabled air to achieve supersonic performance.

For the highest flight altitude achieved by manned aircraft, it's depended on how you define an aircraft. For manned vehicle laterally all spacecraft including space shuttle fly above 380km. But since their flight dynamic is achieved by the use of external booster (in the other words, rockets) at the initial flight stage (that means the launch) and being held on the orbit (i.e. level flight) by the inertial force (so no thrust) which maintains the vehicles at the Escape Speed (in plain words, the speed to get away from a planet), it doesn't count as an aero-dynamic vehicle (in our words, airplane). The recorded manned airplane operation with the highest altitude achieved is the SpaceShip One flight on 21st June 2004, at the altitude of approximately 100km.

航程超過2小時的, 民航機的飛行高度一般是11000公尺, 航程在2小時以內的, 大多是7500~ 10000公尺之間.

飛機發行的是大氣層的最低層, 稱為對流層, 高度約為14公里.

10000公尺等於10公里.