Does anyone have any thoughts about the different wings used by soaring birds? Eagles and other birds with low aspect ratio wings generally have multiple spread-out feathers at the tip. How do these feathers work? An albatross has a high aspect ratio wing with tapered tip and often flies in...
I am designing a rigid sail system for a sailing boat. The boat is a 30ft. long trimaran with an estimated maximum speed of of 18-20 knots, but normally operating in the 8-10 knot range. The sail will be approximately 30ft span and 5ft chord with a rectangular planform. The aerofoil section I am...
