Such as the aviation Arplast Helice ground-adjustable propeller. /wiki/Arplast_Helice
Engineering News - http://www.engineeringnews.co.za/article/a-new-start-for-marine-propellers-2005-03-18 http://www.engineeringnews.co.za/article/a-new-start-for-marine-propellers-2005-03-18
Patent application -Stahl, B. patent 2006 http://www.freepatentsonline.com/7056092.html