THE PROBLEMS OF SELECTING THE POWER PLANT FOR LIGHT PROPELLER-DRIVEN AIRCRAFT AND UNMANNED AERIAL VEHICLE TAKING INTO ACCOUNT THE REQUIREMENTS FOR COMMUNITY NOISE

Abstract

The problem of selecting a propeller-driven power plant including a single propeller and a piston engine for an aircraft taking
into account the requirements for community noise is considered. The competitively necessary community noise levels for light
propeller-driven aircraft are formulated, focusing on which it is necessary to design modern aircraft that meet the current and future requirements of ICAO. Modern noise reduction technologies are considered and their effectiveness is evaluated. The main parameters when choosing a propeller are its diameter, the number of blades, the configuration (pusher or tractor) and the presence of a duct. When choosing a piston engine you should take into account the higher acoustic efficiency of two-stroke engines compared to fourstroke engines. The use of intake and exhaust mufflers, as well as sound-proofing hoods, significantly affects the mass and size restrictions, so the need to install mufflers and hoods should be determined at the preliminary design stage. The design mode for the design of light propeller-driven aircraft is the take-off power condition, for propeller unmanned aerial vehicle is maximum cruising level flight mode.