Hi Cliff,

Welcome to the forum and those are some good questions.

The short answer to both of your questions is yes.

However, Ill go into some more detail.

1) A 3D print can certainly be solid ad this is something that can easily be made to happen by changing the infill setting on the 3d slicing software (a piece of software to slice a CAD model into many layers). However, a solid model does not automatically make it water tight and a model that is not solid is not automatically porous. As a 3D printer builds up layers of plastic, sometimes water can seep through the layers. Therefore, whether a print is water tight depends on how the print is printed (e.g varying temperatures and layer heights). With careful attention to the printing it is possible to make completely hollow prints water proof.

2) Yes it would be possible to print a boat of the size you require but only on some industrial mammoth of a printer. A print bed of over 10 foot long is going to be very hard to find and if you do find it it will probably be very expensive to use. Of course it would be possible to make your boat in many parts and then assemble them, however, considering most consumer 3D printers have a build bed of 10" x 10" x 10" or less it would require many parts to make the size of boat you require.

I hope the above answers help you and if you need any more advice feel free to ask.

You can also get in touch via our email : support@3dexfilament.com