From Jensen's website: "Jim Kimball Enterprises of Zellwood, Florida set a goal of having a piston powered biplane with a greater than 1:1 thrust to weight ratio. I am proud to announce that this goal was obtained with the Beast! How? First of all, with excruciating focus to detail in the construction, materials and methods used to build the Beast. Carbon fiber, titanium, and magnesium were used to keep the aircraft light yet strong. However, years of hard core aerobatics has proven that a welded tube truss fuselage is hard to beat. So steel construction was used in the Beast with various enhancements of modern materials and bracing to guarantee maximum strength. The wings are constructed with wooden spars and ribs. Carbon fiber wing tips finish the primary structure of the wings."