In the paper, the results of an investigation on the electrical drive of a hybrid flying platform (BAL) are presented. Due to restrictions on flying platforms it is necessary to use solutions with a limited number of sensors. For that purpose an investigation of two versions of electrical drives with a BLDC motor without a speed feedback has been conducted. The obtained results have been compared and conclusions regarding the practical use of the motor drive have been made. The investigations discussed in the paper concern only the proposed methods of speed estimation based on current measurement.