In response to the enormous popularity of saildrive units in recent years Austral has developed a range of aluminium three blade propellers to specifically suit these units. Basically these propellers are designed for use on cruising yachts where auxiliary power and smoothness are of more importance than maximum sailing speed. These propellers have larger blades than our 2 and 3 blade fixed or folding yacht propellers therefore this design provides greater efficiency and manoeuvrability. The propellers are cast in a corrosion resistant aluminium which significantly reduces the potential problem of corrosion and electrolysis which can occur when a bronze propeller is fitted to an aluminium saildrive unit.