hesham ACCESS: USAP Senior Member Joined 26 May 2006 Messages 33,477 Reaction score 13,525 3 October 2012 #1 Hi, http://www.dtic.mil/dtic/tr/fulltext/u2/a468743.pdf Attachments XG-21.JPG 24.3 KB · Views: 132 XG-22.JPG 27 KB · Views: 128 XG-32.JPG 29 KB · Views: 122 XG-33.JPG 32.3 KB · Views: 116 Amphibian.JPG 23.9 KB · Views: 111