Water Screws, page 2

By Xah Lee. Date:
boat propeller
Propeller for a small boat. (Source) The scars on the blade are Cavitation damage.
water screw
MS Europa (Build in 1938). 1280×960
water screw
Submarine from World War 1. 895×983

Above photos are taken in the Villa Hügel, Essen, Germany, ~2004, contributed by Volker Peters.

moto g plus 2017 7f48d
moto g plus