duPont Aerospace DP-1C Vectored Thrust Vertical Takeoff Test http://www.flightschoollist.com/blog/2010/11/dupont-aerospace-dp-1c-vectored-thrust-vertical-takeoff-test/ … via @aviationblogs
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duPont Aerospace DP-1C Vectored Thrust Vertical Takeoff Test http://www.flightschoollist.com/blog/2010/11/dupont-aerospace-dp-1c-vectored-thrust-vertical-takeoff-test/ … via @aviationblogs