Anchor Handling Tug - Bath Tub Boat

prusaprinters

<p>This is the anchor handling tug, roughly modeled after an 160 ft anchor handling tug. &nbsp;This model was developed with play in mind. &nbsp;These tugs are used in open water to move ship or oil rig moorings as well as general towing. &nbsp;It has a blend of features, to make it realistic, but not fragile. &nbsp;Many iterations were created to optimize the weight of the boat as well as the buoyancy of the hull to ensure it is stable in the highest of seas. &nbsp;The model is split into two parts. &nbsp;One file for the hull and one for the ship superstructure. &nbsp;Thee hull has indentations for properly locating the superstructure when it is time to glue them together.</p><p>When you import the STL file into the slicer, input it as Imperial Units. &nbsp;If imported conventionally the hull may show up as being very small and will have to be scaled to 2540 to convert it to inches.</p><p>Ultimately the solution to making it seaworthy was to minimize the mass, especially at the top of the ship and adding ballast close to the bottom. &nbsp;The ballast in the model is sized for common ¼"-20 nuts as the ballast. If you scale the STL, the ballast will no longer fit as designed. &nbsp;If you do not want to go through the trouble of the ballast, the model will still print perfectly, but will be better suited to play on dry ground. &nbsp;I have printed with PLA, PLA+, and PETG without issues. &nbsp;All were printed using 0.4mm nozzles, with 0.20mm layer heights and 3 perimeters for a better chance of being water tight.</p><p>In order to optimize the weight, the print settings require a low percentage of infill, which can cause issues with the top decks. In order to get around this, I utilize modifiers in Prusa Slicer to create a “net” of denser rectilinear infill for a few layers under each deck.</p><p>A guide to modifiers can be found in the following Prusa Article</p><p><a href="https://help.prusa3d.com/article/modifiers_1767#modifier-meshes">https://help.prusa3d.com/article/modifiers_1767#modifier-meshes</a></p><p>Alternatively, I have attached the presliced G code set up for a pause at the height for the ballast, as well as an additional pause for a color change of the hull. &nbsp;This file was created for PLA+ and was printed with 3D Fuel Pro filament.</p><figure class="image"><img src="https://media.printables.com/media/prints/229308/rich_content/133e7749-c4ad-4a4b-9f7e-d40eb0a34b43/deck-modifier.png#%7B%22uuid%22%3A%22a274e8bc-6731-4685-a100-fe77e19a3cd2%22%2C%22w%22%3A3800%2C%22h%22%3A2172%7D"></figure><figure class="image"><img src="https://media.printables.com/media/prints/229308/rich_content/7e1c4deb-e503-47a3-a2b2-411b9c82bf2b/upper-deck-modifier.png#%7B%22uuid%22%3A%22dce4c783-9a2a-4ccc-a5bc-5d594607ec3f%22%2C%22w%22%3A3840%2C%22h%22%3A2172%7D"></figure><p>At a minimum, if you want the ballast weight, there will be one required color change as shown below at layer height 6.40mm. &nbsp;This pause will allow you to place the 13 nuts as ballast. It is a good idea to put a small drip of superglue on each nut to prevent any future rattling.</p><figure class="image"><img src="https://media.printables.com/media/prints/229308/rich_content/518d6b8e-cf49-4bee-9e26-130c07659c12/pause-for-ballast.png#%7B%22uuid%22%3A%226a1267a9-8cee-46f7-81aa-64792c50f272%22%2C%22w%22%3A3848%2C%22h%22%3A2110%7D"></figure><p>The following print setting suggestions have worked well for me.</p><figure class="table"><table><thead><tr><th>Perimeters</th><th>Bottom Layers</th><th>Top Layers</th><th>Main Infill</th><th>Deck Net Infill</th></tr></thead><tbody><tr><td>3</td><td>4</td><td>4</td><td>Gyroid, 3-4%</td><td>Rectilinear, 15%</td></tr></tbody></table></figure><p>These pictures from the printing process will give you a good idea of the deck net as well as the ballast placement.</p><figure class="image"><img src="https://media.printables.com/media/prints/229308/rich_content/22ee149f-2a76-495f-9849-6832c0146b42/ballast-placement.jpg#%7B%22uuid%22%3A%22cd88cc24-87aa-4faa-8472-e4cc41218207%22%2C%22w%22%3A4032%2C%22h%22%3A3024%7D"></figure><figure class="image"><img src="https://media.printables.com/media/prints/229308/rich_content/902b8cff-4d90-43e9-aeae-de0068e775bd/deck-mesh-net.jpg#%7B%22uuid%22%3A%229cfc53f5-5d8c-4a24-983a-e04415216410%22%2C%22w%22%3A4032%2C%22h%22%3A3024%7D"></figure><p>Enjoy and happy sailing!</p><p>&nbsp;</p>