FrostQueen, A "Steam" Boat

by ProfessorSparks

This model is going to be a working "steam" powered Riverboat. Twin Paddle Wheels. A rocking beam steam engine. I am designing this model in Tinkercad. I am a total neophyte when it comes to 3d design, up to this point my best design has been a knob for a radio scanner. Update 7/2/15 : The First rev of the complete engine is now posted. All the parts are there but they haven't been tested yet. Goal: To create a 3d printed working "steam" engine that will power a boat using paddle wheels. The boat will need to be buoyant enough to support itself, the engine, the paddle wheels and the "boiler". The "Boiler" will actually be a reactor, Using hot water, to convert Dry ice to C02 gas, the C02 gas will take the place of steam in this engine. Concerns: A steam engine is usually made to tight tolerances. parts are machined out of metal. I have to print using low resolution simply because I would not have time to print at high res. This means my engine has extra room around the pistons and fittings. Will the tolerances be close enough that the engine functions? It will be interesting to see if the "boiler" can simply move the piston. since I have never designed a steam engine before and I am simply creating the parts using Tinkercad, I'm not sure about the exact measurements for parts such as the crank arm, to accommodate for this I am designing certain parts to be adjustable and once the correct size has been determined, these parts will be "frozen" in size with glue. Update 7/8/15. The "boiler" can definitely move the piston! https://youtu.be/PmPnefZgURk Activating the "boiler" http://youtu.be/AbHvNOdBUkY Boiler running on Hi! http://youtu.be/Kt9tBcXdJtY Ran into a mechanical issue. I didn't take into account the thickness of the Cylinder lid, so that shortens the actual distance the piston can travel. this would in turn shorten the distance the crank throws. so to adjust for this I have simply printed 3 different size cranks and made them adjustable so that I can take int