Abstract: A valve device (10) for a pneumatic tyre (12) having an upper and lower desired inflation pressure. The valve device includes a main body (16) having an inlet port (18) adapted for sealed engagement with a compressed air supply (20) and an outlet port (22) adapted for sealed engagement with the pneumatic tyre. At least one pressure sensor (24) for sensing the pressure in the pneumatic tyre and an electrical indicating means operatively associated with the at least one pressure sensor is also provided for indicating to a user when the pressure in the pneumatic tyre is below the lower desired inflation pressure or above the upper desired inflation pressure.

Abstract: A tip brake unit for installation in tip portions of rotor blades of rotary wing aircraft having a plurality of load-carrying rotors has a frame of a size and shape for installation in a tip portion of a rotor blade. An elongate tip brake member of channel cross sectional shape with a closed outer end is supported and guided by rollers on the frame for movement longitudinally between an inner position in which a closed outer end of the tip brake member is flush with the tip of the rotor blade and an outer position in which the tip brake member projects beyond the tip of the blade. The open side of the channel shaped tip brake member faces forwardly with respect to the direction of movement of the tip portion of the rotor blade in which the tip brake unit is installed.