Abstract: An engine mount (1) is disclosed which is particularly suitable for a propeller-driven aircraft. The engine mount (1) comprises a tubular frame structure (3) for the attachment of an engine (4) to a supporting structure, particularly to a cowling box (2). The frame structure (3) comprises a multitude of point-shape connected and braced members (8), (11), (12), (13), (15), and is part surrounding the engine (4). The engine (4) is bolted to mounts at one end of the tubular frame structure (3) in the direction (5) of drive, and, at its other end in the direction (5) of drive, the tubular frame structure (3) is, in turn, bolted to mounts on the supporting structure. According to the invention at least one member of the tubular frame structure (3) is an active member (12) the length of which can be changed under control.

Abstract: In the case of a profile edge of an aerodynamic profile the profile edge (1, 20) comprises multifunctional material on its outside (3, 23) and/or inside (2, 22) or within its structure (11).

Abstract: An actuator (1) having at least one triggerable element (4,5) of variable lengths made of a multifunctional material (6) for large regulating distances is disclosed. The multifunctional material is arranged in layers on a deformable platform carrier structure 93), the carrier structure and the multifunctional material being disposed symmetrically about a longitudinal center plane (7) of the actuator. The carrier structure includes at least a pair of arcuate sections formed on both sides of the longitudinal center plane of the actuator, each such arcuate section describing an arc of at least 180.degree.. The triggerable elements of variable lengths may be actuated with heat supplied by a separate heat source, or by electricity provided from a separate source of electricity so that the triggerable elements either expand or contract, thus moving a stringer (26) formed as a part of the carrier for performing the desired actuation function.