A micro-switch activated by right rudder + full right trim connected to a 280 motor with a very small prop is enough to get you home if there is no wind. It's not fast, but that's not what you are after.
As in full size boats, put the prop alongside the rudder,and use a Graupner folding prop, this will reduce drag when sailing.
The only other way to deal with a no wind situation is to take along a bottle of wine, wait with a glass in your hand, until, finally, enough breeze comes along for you to return to port, and then have First Mate drive you both home.
