North American X-16D Hypersonic Research Aircraft Concept (1967)
About the Design
The X-15 rocket-powered spaceplane was arguably the most important -- and famous -- X-plane of the Cold War Era. Prior to the X-15 program's abrupt cancellation in 1968, the Air Force was drafting ambitious plans for the aircraft, including a "next generation" X-15-D that would test the limits of hypersonic flight (Mach 5+) using an exotic new hydrogen-fueled scramjet engine.
Unfortunately, the X-15-D never made it past the drawing board. Had the program been allowed to continue, the X-15-D would have no doubt added further luster to the X-15's sterling legacy.
About the Kit
Released in February 2011, the 1:72 X-15D was created in CAD by Scott Lowther and cast by BLAP! Models. The kit featured landing gear and decals by JBOT. This was the first -- and so far, only -- model of the X-15D concept ever created.