What is a propeller fan?
The fan is a rotating mechanism that uses a specially angular shoulder blade to create a thrust. Generally known as a support or bolt, it is a tool used primarily as a way to provide locomotion, mostly on aircraft and ships. The difference between the propeller fan and the fan used for air circulation is the emphasis on creating a high pressure as opposed to the high volume.
The fan basically dates back to the Greek scientist Archimedes, whose design of the screws of the same name worked for lifting water from the lower source. This bolt concept would not be translated into a drive in about 1,500 years, when in the middle of the 18th century two scientists, J. P. Paucton and James Watt, separately proposed using a propeller fan in the air and in water. Although the aircraft lasted longer than the next century before it would literally step out of the ground, the first drives -driven screws were introduced in the 18th century and, together with the steam machine, revolutionized travel.
from the successful Wright Brothers flight in Kitty Hawk in northern KAroline in 1903 was the propeller the simplest and most reliable source of aircraft drive. In sea and flying machines, the propeller relies on Newton's third law of movement, which states: "There is always the same and opposite reaction to each action. The props push air or water behind the vessel and cause the reaction drive forward. The angle of the Proper blade, the speed of their rotation and the various other factors affect how high the speed is handed over by the process.
Air and water props can have different numbers of blades. The aircraft propellers usually have from two to eight blades, while the sea screws generally have three, four or five. Complex mathematical equations are used to determine the correct size, angle and thickness of each blade for optimal performance. Incorrect specifications result in loss of power, sensitivity and sometimes direct propeller failure.
unique to sea propeller, due to their use in fluid environment, may be known as cavitation if the screw begins to spin too faste or too much energy pushes through it. One or more bubbles are formed around the screw and quickly collapses and generates a shock wave that can seriously damage the propellers, blades or the surrounding part. In addition to the damage that can occur due to a single cavitation, trauma may occur over time due to many small cavitation that occurs in the same place. These are usually caused by a minor defect or defect in the screw. This can also cause damage and premature failure.