Brightwork, nice work…. I’m working on the same boat.
5 ply Baltic birch keel & ribs. Basswood planking then wrapped in 3/4 oz fiber glass with bob smith 2 part epoxy. ( cover the sins as well as water proofing )
Using a brushed 540 motor that’s approximately 85 turns, 1-1/8” 3 bladed prop. Direct drive. 7.2 v battery. Now, I used a lot of ball bearings and copper BB’s for low ballast and then covered in 2 part epoxy to hold them in place.
Sounds like we’re building the same size tub here, but mines coming in a lot heavier. After testing in the bathtub, I want mine to sit low in the water giving me less bobbing around.
Thank you to you and Ron who’s in this already.
Inspiration and motivation 🤕