Decades and decades were spent in research before humans could taste what flight was like. Finally, after years and years of research, the flight had become a reality. An airplane is made up of different parts, and we could spend hours and hours explaining what some of the components are that make an airplane fly. However, the large component that gives an aircraft the required thrust will be discussed in the following pages, this large component is the propeller. There are many types of propellers, such as ground adjustable propellers, two-position propellers, controllable pitch, auto-pitch, reversing and beta control, constant speed, fixed pitch and pitch propellers. complete flag. However, the propeller types that will be discussed in depth are constant speed, fixed pitch, and full feathering. To begin with, what is a propeller? An aircraft propeller can be thought of as a simply rotating wing of equal length, meeting at the central hub attached to the aircraft's engine crankshaft and making its way through the air primarily through its shape. The rotating blades of the propeller mounted on a horizontal shaft will exert pressure on the mass of air encountered, throwing it backwards and producing a forward reaction called thrust (thrust is the force which tends to pull the plane forward). In a propeller blade, when the relative wind encounters the blade, it is equal in magnitude and opposite direction to the resultant of two speeds, the speed of rotation of the blade element considered and the speed of the air flow approaching the propeller. Since the propeller blade is moving forward and down, the relative wind is backward and upward, opposite the direction of the resultant of the two speeds. As before...... middle of paper ...... performance becomes one of vital importance. In all types of conditions, the propeller must not lose its efficiency, it must be a precision instrument, a perfectly balanced and relatively light instrument actually doing the work of a locomotive. Years of work, research and scientific experiments went into making the propeller, all to allow humanity to experience what flight is like. .textron.com/von_klip_tip_cs_propeller.pdf http://connecticutscorsair.com/hamilton_standard_manual.htm http://lancaironline.net/lists/lml/Message/38218.html http://www.enginehistory.org/Propellers/Governors/ hydgov.shtml http://www.avweb.com/news/maint/185020-1.html?redirected=1 http://www.rapp.org/archives/2013/03/propeller/http://www. bestinflight.net/DocLibrary/PropellerTheory.pdf