From France... comes an interesting proposal to design a paraglider very rectangular, so that almost all the ribs and panels are equal, therefore, very easy for the amateur. Only some of the cells of the tips would be gradually reduced in size ...). It occurs to me start with the basis of "Trilair" from Ailes de K. .. I think it was almost a pure rectangle, was a glider from the easiest to build and also one of the more expensive and more efficient in their time ...