I bought plans for the Junyo aircraft carrier several years ago. She is exactly 60” long, qualifying as an XL convoy ship, she also has a high stern relative to many other carriers, which keeps the sink deck higher. After printing the C3 I decided to print this ship just before nats. I went with geared 550’s based on the size of the boat, using the traxxas mock ups from this site, modified a bit for my purposes Motor plates installed stuffing tubes and struts. I ensured there was clear water flow to props and stern shape remained scale. Stuffing tubes are sized for 5mm shafts with nats rapidly approaching, I assembled from the stern as prints finished. I added 6x fiberglass rods for extra longitudinal strength aft deck area with deck magnets here she is on Wednesday before nats I epoxied many of the sections together, it does better filling minor gaps from print errors Gluing in stringer reinforcement superstructure and flight deck from yard sign material I used one of my common riudder mounts with a sliding mounting surface internal armor, Thursday before nats Rest of the rudder mount Sheeting prep with duct tape island area dried depth of hard area sheeted, Thursday before nats insides, she runs at 4s life with 15Ah packs (overkill on capacity). Pump added for draining water between runs Drive motors and receiver painted and ready to go On the water at nats Ballast was good, only weight needed was to offset the island. boat ran great at nats. The hull doesn’t have much resistance to flow. She was too fast on Thursday but her runs were unnecessary given the scores. I plan to add some drag discs to the shafts which will help make the speed less sensitive. Otherwise I don’t have any other modifications to make to the design. I don’t think she was ever close to sinking so I’ll run some sink tests to check stability. I’ll add some more photos soon
Thanks guys, more pictures of finished product Rudder hatch area gears. Covers are used when running Pump mount is printed separately and aligns with holes in the bottom relay for controlling power to pump, triggered by pulolu board. Simple bus bar to split power Elevator float. I need to reglue bow section. I will add a recess to hold the counter weights for future hulls. Water channel seemed to work ok through hull 1/4-20 bolt for the float anchor point. The area is reinforced, with water passages in the outboards how the float sits, just over the pump bow deck. I should fill in craters for the magnets. I used yard sign material, Dremeled out the top and infill for magnet positions, leaving bottom layer solid to hold magnets shafts, props and rudder. She turned pretty good for an XL convoy side view. I’ll add some partial drag discs around the shafts about 4” forward of props, which will help with speed sensitivity, acceleration, and turning
