2018 12 27: This project is stopped and won't be developed. There is a critical error in design: screw is too high and at higher rpms generate more buzz than thurst. Boat is too small to make it go deeper so if you'll develop it further, either screw deeper or boat a little higher is it could go a little deeper without a a risk to sink.
2017 07 23: applied putty twice, painted twice (not sure if it was worth doing so) and applied yacht lacquer. Buoyancy seems just fine, 2,5 kg is a the limit. Hopefully, all the components will be lighter.
2017 07 20: bottom part is glued and it's a nightmare. Especially the front end. Next on the to do list is a lot of grinding, applying putty, polishing and eventually some adequate water insulation. Haven't decided on that yet should I stick to marine lacquer or glass fiber with epoxy. Anyhow, it's nice thing to make, but not suitable for mass production.
Ok, this is just a very start and it's not ready for sure. All credtis go to Lewis, I just used his work and modified in my way.
Since I'm not a big fan of glueing, a lot is done by interlocking parts therefore ir you will use any other thickness of plywood than 3 mm, you will have some issues. So use at your own risk.
Up to now some tricks and hints: for sides - soak them in watter for 20 minutes before bending. Also mind patern of the tree as one way it bends, other - breaks.
Components, intended to be used for this boat:
Servo for steering:
Brushed motor with 4 x 100 mm shaft and screw:
I'm new to RC things to if you have advices you are more than welcome to advise me.