Measuring characteristics of propellers at different angles of attack

V okviru naloge smo izdelali in analizirali aerodinamske karakteristike propelerjev z možnostjo nastavitve vpadnega kota. Z željo po čim manjšem časovnem in finančnem vložku, se pri konstruiranju in testiranju propelerjev pojavlja vprašanje, če je mogoče s pomočjo 3D tiskalnika za plastiko izdelati prilagodljive, skalirane propelerje, s katerimi lahko pomerimo verodostojne podatke o učinkovitosti za različne konfiguracije propelerjev. Osredotočili smo se na izdelavo merilnega mesta, ki smo ga nato vstavili v vetrovnik. Spremljali smo vplive spreminjanja vpadnega kota lopatic na končno moč oziroma izkoristek trokrakega propelerja. Iz dobljenih podatkov smo določili optimalno konfiguracijo propelerjev glede na izkoristek, ceno propelerjev in hitrost zraka.As part of the project, we produced and analyzed the aerodynamic characteristics of propellers with an adjustable angle of attack. When designing and testing propellers with the desire to spend as little time and money as possible, the question arises as to whether it is possible to use a 3D plastic printer to assemble flexible, scaled propellers that we can compare to authentic performance data for different propeller configurations. We focused on making the measuring device, which we then installed into the wind tunnel. We examined how changing the angle of attack of the blades effects the capacity or efficiency of a three-bladed propeller. From the obtained data, we determined the optimal configuration of the propellers regarding efficiency, cost of propellers and air speed