Posted 7 years ago by boyt in category: geeky   Comments (1)


Posted 7 years ago by boyt in category: interesting   Comments (0)



Posted 7 years ago by bolidk in category: wtf   Comments (0)


In this video, Randy Dobson explores the helicopter speed limit, dissymmetry of lift, and what causes retreating blade stalls.
Posted 7 years ago by Landan2010 in category: interesting   Comments (0)