Certificate of Registration Media number Эл #ФС77-53688 of 17 April 2013. ISSN 2308-6033. DOI 10.18698/2308-6033
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  • Английский

Нovering ceiling of an electric multicopter

Published: 28.09.2018

Authors: Sverdlov S.Z.

Published in issue: #10(82)/2018

DOI: 10.18698/2308-6033-2018-10-1808

Category: Aviation and Rocket-Space Engineering | Chapter: Design, construction and production of aircraft

The article considers the hovering ceiling of an unmanned electric multi-rotor helicopter (multicopter) — the height where all available power is equal to the power required to hovering with a given flight weight. In determining the static ceiling of the electric multicopter, the aircraft features distinguishing them from conventional helicopters, are taken into account. It is found that the hovering ceiling of an electric multicopter is determined by the thrust-to-weight ratio and rigidity of the electric motor mechanical characteristics. The analysis of a typical quadrocopter configuration shows that the value of the hovering ceiling can be at least 5000 m. The dependence of the hovering ceiling on the supply voltage is studied; the decrease of the voltage significantly affects the hovering ceiling. The dependence for the minimum value of the thrust reserve ensuring the flight of the multikopter at a given decrease in the supply voltage during the flight is deduced from the formulae for the hovering ceiling. The formula and tables for calculating the minimum thrust-to-weight ratio, allowing estimation of these values when designing a multikopter, are given

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