AN AIRPLANE WITH UNCONVENTIONALLY PLACED PROPELLER POWER UNIT

The significance of the influence of operating propellers on the aircraft aerodynamic characteristics is well-known.Wind tunnel Smart Phone Cases testing of an airplane model with operating propellers is a complex task regarding the required similarity of the full-scale and the model case.Matching sufficient similarity in axial and rotational veloc

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Unexpected attraction of polarotactic water-leaving insects to matt black car surfaces: mattness of paintwork cannot eliminate the polarized light pollution of black cars.

The horizontally polarizing surface parts of shiny black cars (the reflection-polarization characteristics of which are similar to those of water surfaces) attract water-leaving polarotactic insects.Thus, shiny black cars are typical sources of polarized light pollution endangering water-leaving insects.A new fashion fad is to make car-bodies matt

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