X-51
Encyclopedia
X51 or X-51 may refer to:
- Boeing X-51Boeing X-51The Boeing X-51 is an unmanned scramjet demonstration aircraft for hypersonic flight testing. It successfully completed its first free-flight on 26 May 2010 and also achieved the longest duration flight at speeds over Mach 5.The X-51 Waverider program is run as a cooperative effort of the United...
, a scramjet-waverider from the Air Force Research Laboratory - X-51 (Deus Ex), a fictional organization in the video game Deus Ex
- X-51 (Machine Man)