In this paper, the possibility of attaching composite blades to the hub of helicopters rotor is estimated. To assess the capabilities and determine the working ranges of application, static and fatigue tests of one of the variants of structurally similar specimens (SSS) were carried out, having a panel made of composite material of the HexPly® 8552 brand in the upper and lower parts, between which there was a honeycomb core of reinforced paper. The obtained data on the performance of the blade attachment points to the rotor hub were compared with the similar results of the conventional attachment of the blades. It is shown that the proposed design allows to reduce the weight of the fastening device while maintaining its strength characteristics and is possible when using and developing new designs. The test specimen has the honeycomb structure of a product and is made with Nomex core of high-temperature aramid paper formed into a honeycomb structure and covered with phenolic resin. Shell material HexPly® 8552 is a solid amine toughened with epoxy resin. It contains unidirectional braided carbon or glass fibre.