may i know the other term of propeller blade particular in ship propeller There is no alternative term for "propeller blade", but the entire prop is sometimes called a screw.
rotor ?
The propeller blades are angled in the opposite direction, sort of like an airplane flying on its back. Of course, the propeller's blade twist from hub to tip is inappropriate, and the camber of the airfoil is wrong when thrust is reversing, but efficiency of the propeller is not of paramount importance during that phase of operation.
A damaged propeller (e.g. with a blade or part of a blade missing) will "move water" less efficiently.
propeller
It is called a rotor, and it more closely resembles a wing than a propeller blade
To provide a thrust. Otherwise they would simply turn round and round. They need to go through the fluid in the manner of screws.
Two bronze triple-blade wing propellers. One bronze quadruple-blade centre propeller.
The propeller on a turboprop airplane engine spins to move the aircraft through the air. It acts in a way similar to that of the blade in a fan.
Propellers are measured in stations. This is done by first finding the propeller station number where the angle measurements are taken. Stations are measured in inches from the center of the propeller hub. As an example; propeller station 35 would be 35 inches from the center of the hub. The propeller maintenance manual and/or the Type Certificate Data Sheet for the specific propeller will provide the station number. Once you have located the proper station a propeller protractor is used to measure the angle. The protractor must first be "zeroed" (normally at the hub). Then the angle will be checked on the "Face" of the blade (this is the side that "faces" the pilot when sitting in the pilot seat). This must be done on each blade of the propeller to ensure they are all the same (or within limitations set by the manufacturer).
The Twisted blade that helps a plane fly and a ship move is call a propeller.
it looks like a small table top fan blade