Substructure static load test and simulation. A) the whiffletree test configuration, labeled are the following: i) single point load, ii) whiffle tree load distribution system, iii) cable system for tree to structure load distribution, iv) wing root base plate mounted to test stand, v) fixture weight, vi) building block structure under test load, vii) tip displacement measurement. B) comparison between the whiffletree test and the ABAQUS simulations, showing effecting FEA prediction of structural response behavior.