Isotoxal figure 2-dimensional tessellation constructed from regular polygons is isotoxal. For instance, the truncated icosahedron (the familiar soccerball) has two types of edges: hexagon-hexagon and hexagon-pentagon, and it is not possible for a symmetry of the solid to move a hexagon-hexagon edge onto a hexagon-pentagon edge. An isotoxal polyhedron has the same dihedral angle for all edges. There are nine convex isotoxal polyhedra formed from the Platonic solids, 8 formed by the Kepler–Poinsot polyhedra, and six more as quasiregular (3 | p q) star polyhedra and their duals. There are at least 5 polygonal tilings of the Euclidean plane that are isotoxal,
A Plane Is Born packed programme sees major progress on the plane with the rudder assembly completed and the fuselage top on and finally bonded. Back at Staverton, Mark learns how to talk - important for a presenter but vital for a pilot as he masters the rudiments of radio communication. In another look at other kit-planes, we meet fellow Europa constructor Peter Kember who was the first ever to home-build a Europa Kit. - All Revved Up It's a red-letter day down at the workshop as the brand new engine arrives with Europa's Andy Draper. Mark takes on the delicate task of fitting