the performance of pid and fuzzy controllers is compared in a commercial device normally used in model airplanes: the s3004 futaba servo. the controller circuit, the power amplifier and the sensor are modified, and then the motor is observed. next, a root-locus method is used to tune a pid for angular position control. simulations and control are made in matlab's simulink, and also a data acquisition card (pci 6024e) is used. results are analyzed at the end of the document: although the pid controller works better, the fuzzy controller shows a similar performance.