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  1. Hi! I'm currently doing a project where i'm constructing a framework for an engine mount connecting an airplane with an engine. The project involves both calculations by hand and with CAD(Creo), and i have no problem with the CAD part as i have done the simulations. The part with doing calculations by hand have caused some problems where i'm doing the calculations in 3-D, and its causing some problems. The top and bottom diagonals are not to be considered in the calculation by hand. Therefore you have 6 symmetrical beams. So far what I have done in the calculations is that i've created a equation system with help of directional cosines which seems to get me the wrong answers. So i'm looking for some help in creating the equations system for this problem.