أرسل هذا في رسالة قصيرة: Characterization of motor and propeller sets for a small radio controlled aircraft

  ______    _____     _____     ______    _____   
 /_   _//  |  ___||  / ____||  /_   _//  / ____|| 
   | ||    | ||__   / //---`'   -| ||-  / //---`' 
  _| ||    | ||__   \ \\___     _| ||_  \ \\___   
 /__//     |_____||  \_____||  /_____//  \_____|| 
 `--`      `-----`    `----`   `-----`    `----`