By John Routledge
Aircraft design
Many light aircraft are braced monoplanes, having a diagonal bracing strut between the wing and fuselage. Without this strut, the wing would need to be stiff enough to resist all of the bending loads created by the lift force on the wings, requiring more structure and hence increased weight. The strut takes some of the lift loads, allowing a lighter structure in the wing, but at the expense of extra drag. Because of the low flying speed of the aircraft, the extra drag caused is small, and therefore acceptable in view of the weight saved.