FIELD: aeronautical engineering. SUBSTANCE: unit for attachment of propeller hub to engine reduction gear has studs 2 screwed in hub 1 with nuts 2 and washers 4 screwed on them. Each stud is provided with blind hole on side of screwing nut 3; each nut 3 is provided with cylindrical skirt 6 at the end and rubberized taper tail-piece 7 with cylindrical guide part 8, bellows 9 with end 10, flange 11 and bead 12, rubberized diaphragm 13 with electric contact 14 and cap 15 with output 16 of electric contact to monitoring unit 18. Bellows 9 is provided with flange 20 and chamber 22; flange 11 is provided with hole in its center. EFFECT: enhanced reliability since break of attachment unit is excluded due to continuous check of its serviceability. 6 dwg
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