“Toepassingsonderzoek grote diameter lage toeren schroeven”, by Peter van Oossanen, Published in “Schip en Werf”, Vol 53, No. 12, pp. 206-214, June 1986 (ID No. 4525).
This paper (in Dutch) addresses the benefits of applying large diameter, low RPM marine propellers. The typical increase in overall efficiency found thereby is identified and explained.