Motor Boat RC - spiral vase printable

I wanted to make a bigger boat so I just scaled up my boat and edit the bow. It can be printed in two parts each 162 mm high. Additional it has now a propeller drive and rudder control. It is designed to use my Roxxy BL-Outrunner which I already used for my plane But this Motor is so powerfull that it would drive the boat to fast without controlling the speed. Currently I am waiting for a receiver to see if I can slow it down enough. Meanwhile I found a little dc motor diameter 24 mm and added a mount to fasten it. Even though its less power it runs well enough and it should not go much faster without risk of capsizing. The driving shaft is a 3 mm rod and the stern tube is 4/3 mm brass tubing. For testing it I just bonded the two parts with tape ;-) http://www.youtube.com/watch?v=nzSYyld0tps&list=UUUS-GdzZ06rh8MPHkMcz0Jg

Be aware that you will use it at your own risk! Better choose flat water without waves and where you can go in - in worst case... ;-)