This video tutorial is the latest in a series that I am working on. It is a continuation of my own learning curve that started with building a solar drive for my kayak. The more I explain the basics to others, the better I end up understanding them myself.
It was made to assist other DIY enthusiasts in understanding motor specifications without going into any theory. Just simple, practical equations and ratios.
I work through two examples - a 12V chordless drill motor as well as the 18V motor that I used in my own homemade trolling motor. In the latter example I show how you can calculate a long list of useful motor characteristics from only a handful of known specifications.