Conventional cruiser type propellers can cause tremendous drag on sailing boats. For this reason we manufacture a range of narrow bladed two and three blade yacht propellers. These units are available in left and right hand rotation with maximum blade width one quarter of the propeller diameter. This compromise design technique can give quite reasonable performance with auxiliary engines under power and also provide very low drag under sail. Due to the reduced blade area of these propellers, a two blade should be selected which is about 8% larger in diameter than a normal area three blade or about 4% larger for the three blade yacht model.