Propeller blade assembly with adjustable inclination to the blades for air displacement using location notches for angular setting of the blades and a single fixing screw

摘要

The angular adjustment between the inclined extension (2) from the hub (1) and the blade (5) is in the form of a projection (6) in the extension (2) engaging with one of a series of complementary recesses in the end of the blade. The two parts being then clamped by a screw (4). The hub (1) is provided with radial inclined extensions (2) provided with adjustable locations for the blades (5). These locations for fixing the blades consists of projections (6) formed on radial projections (2) on the hub. The contact end of each of the blades (5) with the hub (1) is provided with a series of recesses with a form complementary to the form of the projection (6). A hole (9) is provided in the blade to fix it the extension (2) by a screw (4). The angle of the blade is determined by the positioning of the projection (6) on the extension (2) into one of the recesses in the end of the blade (5).