Abstract: A rotary flow inducing device having a rotary flow inducing blade and a protection mechanism including a trigger to move the protection mechanism between an operational flow configuration and a protective no-flow configuration with respect to the rotary flow inducing blade.

Abstract: A composite structure (64) is disclosed for placement on an air, land or sea vehicle to attenuate electromagnetic waves and to break up ice accumulation which might occur under adverse weather conditions. The upper section (22) of the structure comprises a nonmagnetic, pneumatic deicer having a deformable sheet formed of a woven cloth substrate and a fluid-impervious resilient coating, and fluid passages for inflating the deicer section. The deicer section is attached to an underlying section (28) which provides electromagnetic wave attenuating properties. The lower section may be a dual band absorber having an upper elastomeric layer and a lower elastomeric layer loaded with magnetic particles, or the elastomeric deicer section may itself serve as the upper elastomeric layer with the magnetic particle layer.