T' X-15 can be powered by a D or E class engine. I scaled t' model t' a old Estes Phoenix missile nose cone. T' body is made from printed cardstock on a tube and former frame. All t' flyin'  surfaces are balsa covered with printed cardstock. T' decals on t' nose cone are printed paper.  T' basic design came from a small paper rocket that I scaled up on t' computer.  I then redrew all t' panel lines and markings.