To create a unique 3D model of an Army helicopter, specifically a CH-47 Chinook, using Styrofoam, follow these steps:br br Gather materials: You will need a block of Styrofoam, a sharp knife, a pencil, and a reference image of the CH-47 Chinook helicopter.br br Draw the outline: Using a pencil, draw the outline of the helicopter on the Styrofoam block. Make sure the outline is accurate and to scale.br br Carve the basic shape: Using a sharp knife, carve the basic shape of the helicopter from the Styrofoam block. Cut out the rough shape of the fuselage, wings, and tail.br br Refine the shape: Using the reference image as a guide, refine the shape of the helicopter by cutting and carving the Styrofoam. Add details such as windows, doors, and other features of the helicopter.br br Create the rotor blades: Use a separate piece of Styrofoam to create the rotor blades of the helicopter. Cut out the blades and shape them to look like the actual blades of the CH-47 Chinook.br br Attach the rotor blades: Attach the rotor blades to the helicopter using a suitable adhesive. Ensure that the blades are securely attached and can rotate freely.br br Paint the helicopter: Paint the helicopter with the appropriate colors and markings to match the CH-47 Chinook helicopter. Use a suitable paint that will not melt or dissolve the Styrofoam.br br With patience and attention to detail, you can create a unique 3D model of an Army helicopter, specifically a CH-47 Chinook, using Styrofoam. It can be a fun and creative project for enthusiasts of all ages.