Posted 7 years ago by hanks in category: geeky   Comments (0)

Posted 7 years ago by canbee in category: film   Comments (0)

Posted 7 years ago by HellmanJ in category: geeky   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)

It's an A. Watch to the end.

Posted 7 years ago by Bindra in category: magic   Comments (1)