Hi, http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770013085_1977013085.pdf
hesham ACCESS: USAP Senior Member Joined 26 May 2006 Messages 31,674 Reaction score 10,389 20 September 2008 #1 Hi, http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770013085_1977013085.pdf Attachments VTOL 1.JPG 46.5 KB · Views: 123 VTOL 2.JPG 36.8 KB · Views: 115 untitled.JPG 44.9 KB · Views: 87