The article presents the results of a study characteristics wake vortex aircraft with turboprop engines. Using example An-12 aircraft, it is shown that rotating propellers make noticeable contribution to propagation trail behind aircraft. This proved by some studies, as well numerous observations. It also describes technique for studying propellers. method based on discrete vortices. relevance ...

Abst ract:-The South African Sythetic Aperture Radar System (SASAR) was conceived of as a fully polarimetric, multifrequency, airborne SAR. System design work was carried out at the Radar Remote Sensing Group of the Department of Electrical Engineering, University of Cape Town, starting in 1993. Construction of flight hardware was contracted out to Industry and on board integration was given to...

Havac?l?k operasyonlar? düzenlenirken, zaman içinde uçaklarda ya?anan yap?sal de?i?ikler özellikle motor yap?s?nda kendini göstermi? ve jet motorlu uçaklar kullan?ma girmi?tir. Bu geli?imle birlikte Avrupa Amerika’da etkinli?i artan bölgesel havac?l?k; turboprop veya nispeten daha küçük kapasiteli uçaklarla büyük havayollar?n?n operasyon düzenlemedi?i noktalar aras?nda merkezler ile bölgeler dü...

Powering airplanes by hydrogen, as reported on David Kramer in the December 2020 issue of Physics Today (page 27), is a nice theoretical idea that brings little practical benefit.Apart from difficulties handling hydrogen cryogenic liquid or gas at very high pressure, most serious problem with an aviation fuel isn’t weight tanks containing it but rather its low density, even liquid. Consider Toy...

In economics, "competitiveness" remains a very general concept, and its use in applied research does not allow combining their results making unambiguous conclusions. This process is also complicated by the fact that concept composite has two components – price competitiveness value competitiveness. The latter can serve as an indicator of qualitative changes economy. However, this aspect develo...

An analysis of ight measurements made near a wake vortex was conducted to explore the feasibility of providing a pilot with useful wake-avoidance information. The measurements were made with relatively low-cost ow and motion sensors on a light airplane ying near the wake vortex of a turboprop airplane weighing approximately 90 000 lb. Algorithms were developed which removed the response of the ...

Introduction: Development of a diffusion tensor (DT) template that is representative of the diffusion characteristics of the healthy human brain, and is not biased by the properties of a single subject, requires spatial normalization and averaging of the DT information from multiple subjects [1]. However, the effect of the number of subjects on the variability of tensor properties in the result...

A decade has passed since the Hong Kong Observatory (HKO) and Government Flying Service (GFS) jointly commenced operational tropical cyclone (TC) reconnaissance over South China Sea in 2011, currently only such programme region a first USA terminated aircraft western North Pacific 1987. This paper reviews HKO–GFS flights between 2011 2020, including 24 storm-penetrating down to 2000ft 28 dropso...