I designed what is called a “saildrive” for a sailboat which is a low drag alternative for prop shafts on a racing orientated sailboat. The model features an internal driveshaft coming from a motor source in the hull which then transfers the power via a pair beveled reduction gears to allow the shaft power to be redirected 90 degrees to the custom propeller all contained in a efficient manufacturable housing. The Saildrive has two functions, the first function is to provide a means of propelling the boat from an inboard electric motor when not under sail. The second function is to act as a generator while under sail to aid in recharging the onboard battery bank. Sail drives are a modern addition to the yachting industry and have allowed for great strides of radical design allowing for racing ‘sport boat’ style hull forms to be adapted into cruising yachts.