3-bladed manganese bronze propeller, diameter 12?, pitch 11". Disk area ratio Fa/F = 0.52. For 25 mm shafts with taper 1:10. • Number of blades: 3 • Sense of rotation: Left-handed • Disk area ratio (Fa/F): 0,52 • Pitch (inches): 11 • Propeller diameter (inches): 12 • Shaft hole diameter (mm): 25