Quadcopter drone with dimensioned engineering drawing, including but not limited to the following content, remember to add some product concept sketches in the corners Three-view drawing: front view, top view, left view, expressing 3D structure in 2D Part drawings: each part drawn separately, with dimensions, hole positions, materials, tolerances Assembly drawing: explaining how each part fits together Exploded view / exploded assembly drawing: parts spread out to easily view structural relationships Section view: cutting open to show internal structure BOM table: bill of materials listing part names, quantities, specifications Dimension annotation drawing: all key dimensions needed for manufacturing and replication