Helicopter blade for use in hub, has hollow vane end integrated to blade, where vane end is streamlined body for presenting streamlined three-dimensional shape and has lower reinforcement which locks two adjacent lower tapes

摘要

The blade (1) has a wing tip and a hollow vane end (10). A spar (3) and an outer covering (4, 4`) are arranged along wing span of the blade. The vane end is integrated to the blade, where the spar is made of glass fiber such as roving glass fiber. The vane end has an outer wall with the covering integrated to upper tapes (31) and lower tapes (32) from the spar of the blade. The vane end is a streamlined body to present a streamlined three-dimensional shape coherent with streamlined shape of the blade. The end has lower reinforcement which locks the two adjacent lower tapes (32).