Bleriot XI
Helice Normale -(Ratmanoff) c. 1912
Comments:  This demonstrates the classic design of a Ratmanoff propeller.  It has offset blades with rectangular tips.  This is believed to be have been used on the 25 HP Anzani engine and a Bleriot XI airplane well prior to WWI

Wood:  Unknown.
Length:  7 feet, 8 inches.