A uni-rotating propeller is one that can go around in both directions. This type of propeller typically will do different things depending on which direction it is going.
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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.
Well first, u have to go and get a propeller off of something. Then you should go and glue a couple of pieces of popsicle sticks then get an axel and put wheels on it. Then get rubberbands to put the propeller on.
It's the engine that makes the propeller go fast, not the number of blades.
See Aerobicle on Youtube.It's about 20 inches.
The Junkers J-52