Originally Posted by
1QwkSport2.5r
Instead of destroying the deck trying to remove the sponsons and rebuild them, I'm building up the trailing edge of the sponsons with plywood. What I'm doing is sanding down the edges of those steps so it's all smooth and then glue on a single piece over the whole length of the sponsons. Even if I had the edges going the opposite direction and left it like that, each edge would possibly create a vacuum under the sponsons causing drag.
I don't know how much you know about hydroplanes but many of the boats have steps or recesses in the running surfaces to reduce the affect of water along the skin. These areas break the water's hold and allow the boat to plane much easier. These can be seen on the picture of the Oberto unlimited hydroplane shown below:
