This architectural drawing is Detail drawing of helicopter in AutoCAD 2D, dwg file, CAD file. A helicopter is an aircraft that has at least one horizontal rotor or propeller, allowing it to move freely in all directions while hovering in the air, take off and land vertically. In contrast, an aeroplane can only move in one direction, must take off and land horizontally, and cannot hover. For more details and information download the drawing file.