Aerospace Instrument-Making Annotation << Back PROTECTION METHODS AGAINST THREATS TO SAFETY OF FLIGHTSFROM ATMOSPHERIC PERTURBATIONS V.I. Akhrameev, Kheyn Khtet Zo, Ye Khtun, A.A. Makhmutov The article deals with the scientifi c and technical problem of ensuring safety of light aircraft fl ights and their protection against atmospheric perturbations that are produced in a large-scale atmospheric turbulence or arise in a vortex wake trail from other aircraft. This problem is especially topical for low altitude fl ight at approach and landing fl ight stages in the absence of a meteo-radar and the complete absence of optical visibility. The problem could be solved and safety of fl ights could be provided with the help of any other on-board software and hardware. The nature of vortex wake trail from aircraft and a helicopter is considered in the article. A microburst wind shear is considered as well as one of the most dangerous examples of atmospheric turbulence. Algorithms for determining the conditions falling into a downward microburst and a technique for getting out of a dangerous situation using on-board facilities, including an on-board calculator and LCD indicator, are proposed. Experimental results of fl ight evaluation of the proposed algorithms and techniques, conducted on the fl ight simulator of the light aircraft «Sigma-Classic» with take-off weight of 540 kg, are described. Key words: fl ight safety, large-scale atmospheric turbulence, downward microburst wind shear, vortex wake trail from airplane, wake vortex trail from helicopter, algorithms of on-board systems, indication, ground testing, fl ight simulator, safety of fl ight at approach and landing. Contacts: E-mail: akhrameev_vi@mail.ru, E-mail: thihakyawnaingwin22@gmail.com, E-mail: yetun53@gmail.com, E-mail: safari57@rambler.ru Pp. 33-50.