Project: Sailing Submarines - Monohull

thingiverse

Hi! I had some more fun imagining some things..... I live next to a lake that is currently frozen! But it won't be for long :-P Make sure you check out my cool cups & mugs here: https://WeCanDrinkTogether.com/ Similar in concept to the Catamasub here: https://www.thingiverse.com/thing:5935932 and I re-used a fair few parts, like the rudder and masts. Both of these projects use elements of my Bluenose sailing model: https://www.thingiverse.com/thing:5513493 Basically the same hull as my submarine marker buoy: https://www.thingiverse.com/thing:5396600 , slightly modified. I tested it out last year properly ballasted and it has quite the smooth profile in the water. The keel will spoil that a little bit, but hopefully won't be too bad. I thought it would be fun to make a sailing submarine. In part, because I realized that without a crew, a sailboat doesn't <i>need</i> to float above the surface. This one has more interesting things you can do with the front fins being poseable. Hopefully will be able to actually have some foiling/diving sailing if it gets up to a decent speed. I think it'll be interesting to use the hydrofoil fins to counter the roll of the sailboat on a broad reach (wind directly abeam (perpendicular) to the boat's direction of travel). Assemble the keel with two (2) M4x10mm screws. The holes are 4.25mm, so it should be a friction fit for those threads!.... Maybe I'll shrink 'em down a quarter milli.... We'll see. <h1>Update!</h1> I printed a mini version at 50% scale, see photos. It floats more-or-less as expected... At 50% scale, the foremast makes it too top-heavy, but the weight balance of the keel is skewed by the shrunken size. Without the mast though (and without the rudder!) it's floating about 30% out of the water. <h1>Update 2</h1> I've started printing the full-size version. The fit on M4 screws is perfect I also added a hole to the keel to be able to adjust ballast later, and also included a plug in the event that no weight needs to be added. <h1>Update 3</h1> The sail trim I developed for the Bluenose seems to be much more effective. The new, wider sail pattern I tried, with jib, the pattern for which I have not posted was nowhere as effective. I'll be trimming the mainsail down to closer to the bluenose profile and making a new jib sail. Even the lousy jib that I had made itself felt in a big way: really improved the overall airfoil performance. Make sure you check out my cool collection of mugs and cups at <a href="https://WeCanDrinkTogether.com/">WeCanDrinkTogether.com</a>