In production the different models came with 3, 4 or 5 blade propellers of different manufacturers.
It's the engine that makes the propeller go fast, not the number of blades.
Spitfires were made with many different versions of the Merlin and Griffon engines, and also many different propellers with 3, 4, 5 and 6 blades. Most of the Mk 9 and it's variants (the most common Spitfires) Used the Rotol 4 blade propeller.
The 150 and 152 both have 2 blade propellers.
Barrel Assembly
The rotor is like the engine to the propeller. A propeller is the fan like blades on the top that spin to make the helicopter fly.
Propellers can have any number from 2 -8 or so blades.
A turboprop engine is basically a turbojet, but with a propeller connected to the shaft. Air flows in the engine, is compressed by the compressor blades, and is ignited in the combustion chamber. the resulting jet of hot gas turns the turbine blades and shoots out the exhausts. A gearbox and propeller is connected to the central shaft. The turbine and compressor blades are connected to the central shaft. When the turbine blades turn, they turn the shaft, turning the compressor and the propeller. Most of a turboprop's power comes from the propeller.
A propeller moves an object by generating thrust through the rotation of its blades. As the blades spin, they create a pressure difference between the front and back of the propeller, pushing air or water in one direction and creating a force that propels the object forward.
A propeller is like a spinning wing. The airfoil shaped blades pull an airplane forward just as an airplane's wings lift it upward. The amount of thrust created by a propeller depends on how fast and at what angle its blades cut through the air. The propeller is generally powered by a combustion engine which fires pistons and turns the propeller.
Where the gun fires through the propeller, the two are mechanically connected and timed so that the rounds will pass between the blades of the propeller.
There are 22 main models, with many variations. For instance, the Mk IX was fitted with about 3 different engines, also many of the later models could have a 4 or 5 blade propeller.
Excrement - it is "when the excrement hits the rotating propeller blades."