Abstract: The invention relates to the field of aviation, in particular to the design of unmanned aerial vehicles for vertical take-off and landing. The apparatus is a polyhedral (for example, rectangular) body, with the cylinders 1 installed along its perimeter and capable of rotating. To supply air to the inside of the apparatus, the body has inlets 2 leading to the intake area and the gas supply area located within the body, where the centrifugal impellers 3 are installed at the top and at the bottom to create a forced flow of gas. At the outlet from the gas intake and supply area, as well as along the perimeter, there are flow channels located at the top and at the bottom, which have the form of cells 4 that extend into tunnel 5, which narrows at the outlet just before cylinder 1. The top and bottom flow channels are independent and not connected to each other. All rotating parts of the structure (impellers 3 and cylinders 1) are driven by engines 6 (electric engines, internal combustion engines (ICE)).

Abstract: A preparation-making ultracentrifuge is disclosed comprising a magnetic suspension and an electric motor, which are disposed within its casing, said magnetic suspension consisting of a permanent magnet with a magnetic circuit, the armature of said electric motor being made in the form of a sleeve fixedly secured to the centrifuge rotor is disclosed. Such construction of a preparation-making ultracentrifuge enables the rotor to be accelerated to the required speed within a comparatively short time period and allows a reduction in the weight of the electric motor armature.

Abstract: An aluminum-based alloy containing, wt %:Zinc 6.5-7.6Magnesium 1.6-2.2.Copper 0.8-1.2Cobalt 0.05-0.2.Zirconium 0.05-0.3With admixtures of iron up to 0.3 wt %, silicon up to 0.3 wt %, chromium up to 0.05 wt %, manganese up to 0.05 wt %, the balance being aluminum.The alloy may most effectively be used for manufacturing bulky parts of loaded units.