Boat Propeller.
A propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the airfoil-shaped blade, and a fluid (such as air or water) is accelerated behind the blade. Original public domain image from Flickr
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- Low Resolution1200 x 815 px
- High Resolution (HD)2400 x 1629 px | 300 dpi
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