Hi, http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770013085_1977013085.pdf
hesham ACCESS: USAP Senior Member Joined May 26, 2006 Messages 28,992 Reaction score 6,878 Sep 20, 2008 #1 Hi, http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770013085_1977013085.pdf Attachments VTOL 1.JPG 46.5 KB · Views: 120 VTOL 2.JPG 36.8 KB · Views: 112 untitled.JPG 44.9 KB · Views: 84