直昇機氣體動力學 加分題

gwagwa

QUOTE (chinlin @ Mar 9 2006, 11:47 AM)

hi 我也在努力學習中 不過有個好康的電子書 有興趣可以下載 (以前post過, 在post一次) http://www.faa.gov/library/manuals/aircraf...a-h-8083-21.pdf 直升機基本的觀念

感謝分享 晚上又有書好看了

tudole

QUOTE (chinlin @ Mar 8 2006, 10:26 AM)

再一ㄍ小問題 phase angle跟advanced angle有什區別呢(on pitch horn / pitch link) 特別是advanced angle的圖 看了半天 沒抓到他的精神在

Phase angle is the angle between helicopter center line and the swatch plate.

Never heard of "advanced angle" do you have a picture?

chinlin

thanks for reply on MSN.
Under the precession effect, most phase angle is 90 degree. but why some heli uses 45 degree, even other phase angle? do you know why?
it seems a lot of exceptions for the rule "reaction happen after 90 degree ".