You can use this free image under the Creative Commons Zero (CC0) public domain license. Support our free section by adding a credit line next to the photo in your design. A suggestion is provided under the title.
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.
© publicdomainstockphotos | Stock Free Images