hesham ACCESS: USAP Senior Member Joined 26 May 2006 Messages 33,869 Reaction score 14,210 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: 126 VTOL 2.JPG 36.8 KB · Views: 118 untitled.JPG 44.9 KB · Views: 90