Hexagon has no degrees of freedom but can seen as directed edges. Hexagons of symmetry g2, i4, and r12, as parallelogons can tessellate the Euclidean plane by translation. Other hexagon shapes can tile the plane with different orientations. The 6 roots of the simple Lie group , represented by a Dynkin diagram , are in a regular hexagonal pattern. The two simple roots have a 120° angle between them. The 12 roots of the Exceptional Lie group G2, represented by a Dynkin diagram are also in a hexagonal pattern. The two simple roots of two lengths have a 150° angle between
A Plane Is Born on the Europa's wings and Mark puts his composite skills to the test. In part 2, he continues his flight training as he learns about climbing and descending. Nigel Marshall and Rob Cooper talk about the Pitenphol Air-camper they built at work in their lunch-hours. - You Have Control! Work on the plane continues with the Cockpit module and control yokes. Mark also receives a visit from Neville Eyre, his PFA inspector who checks to see that his work so far is air worthy. Over at Staverton Airport, it's pass the sick bag when he is introduced to "stalling". Finally,