Adjustable blade profile for helicopter rotor blade has variable spring force acting between blade body and profile edge adjusted relative to blade longitudinal direction

摘要

The adjustable blade profile is provided by a blade body and a pair of profile edges, at least one profile edge (VPk) adjusted relative to an axis extending in the direction of the blade longitudinal axis. A spring (1) acting between the blade body and the adjustable profile edge has a spring characteristic that alters in dependence on the centrifugal force. The spring (1) acting between the blade body (5) and the profile edge (VPk) may be provided by a spring blade (2) with a piezo actuator at one end.