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The relevance of the topic is due to the need to improve the safety of civil aviation aircraft, reduce operating costs and increase the competitiveness of engines by ensuring their protection from foreign objects from the airfield surface. Foreign objects are: runway wear particles (for example, concrete particles, crushed granite), dust, ice, water, snowplow wires, birds, and so on. Foreign objects entering the engines cause unacceptable damage to the compressor blades, and in some cases their destruction. The destruction of the compressor blades can lead to the destruction of the engine in flight. To solve these problems, the article discusses possible methods that reduce or prevent objects from hitting the air intake. [ABSTRACT FROM AUTHOR]

Currently, it is difficult to imagine the modern aircraft industry without the use of composite materials. Rapidly developing polymer composite materials are widely used in the design of the aircraft. They have increased strength, lower weight compared to metals used in the construction of aircraft throughout almost the entire path of aircraft construction. The use of these materials makes it possible to increase the strength of the internal structures of the aircraft, while not increasing the total weight, and even vice versa – it is possible to reduce it, which has an extremely positive effect on the efficiency of the aircraft. The article analyzes and calculates floor panels from various prepregs, using various fibers and aggregates, in order to find the best material that will meet the requirements of price and strength. A three-layer panel using a honeycomb structure was chosen for the design. [ABSTRACT FROM AUTHOR]