航空器
航空器（英语：Aircraft）是飞行器中个一个大类，是指通过机身搭空气个相对运动（弗是由空气对地面发生个反作用）而获得空气动力升空飞行个任何机器。[1][2][3][4]
任何一种航空器侪必须产生出搭自身重力相同个升力来，才能进入空中。根据升力个产生方式个弗同，可分为两类：轻于空气个航空器搭重于空气个航空器，前者依靠空气个静浮力升空；后者依靠空气动力克服自身重力升空。
攷[编辑]
- ↑ Flight Before Flying by David Wragg (Author) Publisher: Osprey Publishing; First Edition (2 May 1974)Language: English, Hardcover: 192 pages, ISBN-10: 0850451655, ISBN-13: 978-0850451658
- ↑ World's Air Fleets Hardcover – 1 May 1969 by David Wragg (Author), Publisher: Littlehampton Book Services Ltd; 2nd edition (1 May 1969), Language: English, Hardcover:176 pages ISBN-10: 0711000859, ISBN-13: 978-0711000858
- ↑ World's Air Forces Hardcover – 15 Oct. 1971 by David Wragg (Author), Publisher: Osprey Publishing; First Edition (15 Oct. 1971), Language: English, Hardcover: 232 pages, ISBN-10: 0850450381, ISBN-13: 978-0850450385
- ↑ Speed in the Air, Hardcover – 5 Sept. 1974 by David Wragg (Author), Publisher: Osprey Publishing; 1st ed edition (5 Sept. 1974), Hardcover: 192 pages, ISBN-10: 0850451752, ISBN-13: 978-0850451757