About this 3D model

It can be printed in two parts: 162,5 mm (aft) and 163,5 mm (bow) height. Additional it has now a impeller drive and rudder control. But as you can see on the video, the boat is pretty overloaded with it. Only a little mistake is enough to turn it upside. So I had to go back to the little dc motor which makes it much more relaxing ;-) http://youtu.be/UBQ-xlQTCDg I used only a 2 cell battery because the impeller with only 2 mm hole was not printet exactly concentric. With higher speed it touches the housing. However, the impeller M5 runs perfectly even with the Roxxy BL-Outrunner. For testing it I just bonded the two parts with tape ;-) Attention: You will use it at your own risk! Be aware that there will accrue unexpected high centifugal force if you run the impeller with high speed!! If the blades have not a strong connection to the hub, the blades can pull out and become dangerous. So be careful if you use a strong and high speed running motor like the Roxxy Outrunner that I used! Here you can calculate the centrifugal force: http://www.kfz-tech.de/Formelsammlung/Fliehkraft.htm And better choose flat water without waves and where you can go in - in worst case... ;-)