GRIDS FROM AIRCRAFT These first papers try to describe the beginning of electrical systems and their development in the aeronautically field. We described the power systems and their parameters, the influence of different perturbations against on-board systems and make consideration about the use of magnetic circuit with permanent magnets based on rare earth in aircraft manufacturing. Cuvinte cheie: sisteme electroenergetice de bord, perturbaţii, magneţi permanenţi, performanțe Keywords: power systems, noise, permanent magnets, performing
