This torpedo makes the history of the Italian Navy during the last years of the WWII, designed to be ridden like a horse under the sea by two soldiers, this torpedo needed a lot of bravery to be drived till the enemy boats silently. It was 7.3 meters long, this model is 73 cm and you can scale it by 50% to print easily each section with a common desktop printer, Nozzle 0.4 Layer 0.2.All the best from Italy!