modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of ...

HOUSTON -- The aviation obstruction lights at the top of a radio tower hit by a helicopter in a deadly crash in Houston, Texas, have a history of not working, according to a report. SkyEye ...

HOUSTON, Texas (KTRK) -- Eyewitness News learned the aviation obstruction lights at the top of a radio tower hit by a helicopter in a deadly crash in Houston's Second Ward have a history of not ...