New propellers probably won't increase his cruising speed beyond its current 18 knots, but today's propeller designs better match individual boats and engines and improve fuel economy, run more smoothly and quietly, increase performance in the mid-rpm range, and even reduce the need for trim tabs.. We then use this propeller selection in a propeller drawing program which is a parametric design/drafting tool for the preparation of detailed and dimensioned propeller drawings. the designs made with the use of this equipment are then transformed into patterns, castings and a personalised "custom built" boat propeller.. €
