FIELD: aircraft engineering.
SUBSTANCE: proposed air duct can feed air in the temperature range of minus 55°C to plus 85°C and at load with pressure difference relative to aircraft cabin inside pressure not exceeding ±500 GPa. Air duct outer or inner side is furnished with multi-layer reinforcing coat. Every layer has a number of coils formed by at least one continuous fiber. Coils of layers arranged one above another are wound in opposite directions to form the coat cellular structure. Air duct is made from foamed or dense plastic material. Aforesaid continuous fibers are enclosed by matrix made from either thermosetting plastic or thermoplastic polymer. Distance between said coils or angle of inclination between them and air duct lengthwise axis varies along said axis to change coils density along air duct lengthwise axis depending upon local requirements to air duct mechanical strain.
EFFECT: air duct reduced weight and increased strength.
12 cl, 8 dwg
