This is my entry into the #MakeItFloat challenge and the first challenge I have entered.

Designed using OpenSCAD and printed at .2mm layer height and 10% infill using ABS. Printed with supports and raft on a Flashforge Creator Pro and using Simplify3D software.

I tried to make it as large as possible and still print comfortably on my Flashforge Creator Pro, will see if I feel like making it longer and/or taller to hold more weight. The first picture shows the boat floating with $10 (about 226 grams or just under 1/2 pound) of loose quarters in the center channel and 2 AAA batteries weighing about 12 grams each for a grand total of 250 grams (.55 pound). The pontoons were completely submerged before adding the batteries, after adding the batteries you can see the water level is just below (approx. 5 mm or 1/5 inch) the top of the boat.

The second picture is about 20% printed and you can see inside the 2 pontoons (1 is mostly hidden from the x-axis support) as well as the 2 air chambers that are on the inside of the main hull under the quarter channels.

Version 1 - My first attempt and I quickly realized it would hold less than $10 worth of quarters which was my initial target. There are channels to hold quarters in place on end.

Version 2 - Larger and can easily hold a $10 roll of quarters, like the first version it has channels to hold the quarters fairly stable if not packaged into a roll. The channels that hold the quarters are turned sideways on this model, I felt 5 channels was more than enough and each channel holds 1 roll of quarters. Modifications will definitely be needed to allow the boat to float with that much weight.

Version 3 - Not much of an update but the boat was made larger, as large as I could fit on my FlashForge Creator Pro. This is not just a scale update, it is an updated source to make sure everything is scaled appropriately. I have not printed this yet as I have been working on other projects but will post a pic and information about max load when I can test.

This version was printed in ABS but PLA should work as well. I printed with 10% infill although it probably could have used less. I used .2mm layer height and used Simplify3D to do the supports and slicing, supports may not be necessary depending on your printer. I felt printing with a raft helped greatly with the initial warping of the boat bottom and pontoons