This build is quite heavy. It floats, but it is a little low in the water. It toodles around at low speeds just fine, but rev it up and for some unknown reason, it becomes a submarine! The nose dives.
One possible reason for this could be the roughness of the hull due to the layering effects of 3D printing. If this creates enough drag (especially in the front end) it could cause the effect that I am seeing.
Other project goals include a cover that will seal in the electronics with associated grommets etc.