Its an VB application to help music students to pratice play an music, developed specialy to guitar chors, you put the song with the chords and with a timer, it help to follow the music content.

风机动量叶素理论设计中迭代计算风机叶片弦长与扭角-Fan momentum blade element theory design iteration fan blade chord and twist angle

基于Glauert设计法进行计算叶片的风轮直径以及弦长，安装角等数据计算(The calculation of blade diameter, chord length and installation angle based on Glauert design method)