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. Well, blow me down! 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. Arrr!  I then redrew all t' panel lines and markings. Avast!