Newly discovered bug with centrifugal force on beam and truss elements. It affects all version of Mecway from 1.0 to 4.0
http://mecway.com/product.html#bugsIt incorrectly uses the 2D projection of the element's length to determine its mass instead of the true length in 3D space. It does not affect solid or shell elements or other body loads on beam and truss elements. A workaround is to use point mass instead of density with centrifugal force on beams.