Two Hulled Impeller Boat RC (experimental)

thingiverse

To boost the impeller's full thrust, combine two long boats as seen in this video: http://www.thingiverse.com/thing:274054. The high-positioned heavy motor previously capsized the boat with minimal throttle. Attach the boats using a bridge that connects the impeller housing. Both creations are available here: http://www.thingiverse.com/thing:284692, featuring an enlarged impeller boat and another long boat. Remember to close the stern tube with M2 screws covered by heat shrink tubes to prevent water intrusion. Print the hull using a spiral vase method for a smooth surface. Set layer height at 0.3mm and width at 0.6mm. Ensure it's hollow with one perimeter to fit inside the interface part. Align interfaces by placing them in each hull gap, then mask the edges before gluing. Bridges should have layer height of 0.3mm, width of 0.5mm, infill of 0.5, and two solid layers on top and bottom. Account for a wider hull after printing due to flat floor tension, so add extra 3mm when designing bridges. Secure the impeller housing with M3x10mm screws and bridge with M2x5mm screws, using brass strips between screws and hull for protection. Additional parts can be found in these links: http://www.thingiverse.com/thing:284692, http://www.thingiverse.com/thing:272132, and http://www.thingiverse.com/thing:274054.