Title: Charts for determining propeller efficiency
Description: <a href="http://uf.catalog.fcla.edu/uf.jsp?st=UF003614447&ix=nu&I=0&V=D&pm=1" rel="nofollow">http://uf.catalog.fcla.edu/uf.jsp?st=UF003614447&ix=nu&I=0&V=D&pm=1</a>
Subjects: Propellers, Aerial, Aerodynamics--Research.