Electric propulsion

We want our boats to be able to sail with electric motors powered by renewable energy. One of the first experiments was to convert old outboard engines from the scrap with normal 220V AC motors run through inverters from a battery bank.

Currently we are improving designs using motors from mobility scooters. To improve the performance the motors are submerged in fluid. We have had success with using mineral oils and vegetable oil as well as other cooling fluid.

We need to overcome the challenge that oils wear out standard carbon brushes quite fast. We have so far solved this by exchanging the carbon brushes with selfmade brushes out of solid copper.

 

Project start: 
June, 2013