Aerospace Instrument-Making Annotation << Back PROCESSING A CONCEPTUAL FUNCTIONAL DIAGRAM OF AN UNMANNED CONVERTIPLANE WITH A HYBRID ENERGY SOURCE R.N. Nabiyev, A.A. Abdullayev, Q.I. Qarayev Convertiplane is explored in this article as an unmanned aerial vehicle incorporating hybrid power sources and hybrid propulsion systems. Based on the use of an electric generator in conjunction with a battery, fuel element and internal combustion engine as a source of energy in the non-manifold electrical engine convertiplanes, hybrid power sources and hybrid propulsion systems manufacturing specifications, as well as providing convertiplane with a long-term fl ight issues are considered hereby. Scientifi c research in this area includes an analysis of the structural schemes of power systems consisting of consecutive, parallel and consecutive-parallel links of hybrid energy and hybrid propulsion systems. As a result of the analysis, a matrix composed of fuel element, battery and internal combustion enginegenerator type hybrid sources and their optimal connection schemes were determined. Since the use of four hybrid propulsion propeller-motors in the lifting system makes the system complicate and the weight of the convertiplane gets relatively heavy, the convenience of using four electrical engines for lifting, one internal combustion engine for thrust and generator for charging batteries during flight in order to provide long-term vertical flight and hover in convertiplanes which weight is more than 15 kg, is shown hereby. A selection of elements that make up the hybrid power system of the designed convertiplane was carried out and a preliminary assessment of fl ight weight was made based on the thrust force of the propulsion engines. Conceptual block diagram of the convertiplane was developed according to the elements and calculated parameters of the hybrid aerial vehicle made based on various schemes. Keywords: convertiplane, multicopter, internal combustion engine, electrical engine, battery, fuel element, hybrid power source, propulsion system. DOI: 10.25791/aviakosmos.5.2021.1217 Pp. 03-18.