IMPACT OF AN UNDERSLUNG LOAD ON A HELICOPTER CONTROLLABILITY
Abstract
This article is aimed at finding the causes of controllability variations of a helicopter while transporting sling load.The maximum angular acceleration taken by the helicopter at similar controller displacement at different flight speeds was taken as a quantity characteristic of controllability efficiency to study the load impact on the helicopter cont- rollability.This article offers research results obtained with the use of the НеliСargо software. This software has proven to be a great tool for integrated research of the impact of an underslung load on the parameters of a helicopter controllability, and allows carrying out an analysis of the impact of an underslung load on the parameters of controllability under its dyna- mic behavior.The performed computational experiments have shown that the helicopter maximum angular acceleration with an underslung load significantly rises, as compared to a helicopter without cargo or a helicopter carrying the same load inside the cargo compartment. The data obtained during computational experiments corresponds to the results of analytical computations, and is in line with the literature based on the experience of helicopter flight operations.The cause of the variation in the helicopter controllability parameters during transportation of an underslung load has been found, that is - the underslung load considerably increases the main rotor thrust, due to sling load, as compared to a helicopter without cargo. When compared to a helicopter carrying a load inside the cargo compartment, this increased efficiency is mainly attributed to the fact that a helicopter with an underslung load has lower rotational inertia, since the load is not inside the cargo compartment, but outside.The obtained results can be used to improve flight manuals and flight personnel training publications, which could play a significant part in ensuring flight safety and security, and increasing the operational efficiency of helicopters with external slung load systems.
About the Authors
G. N. Babenko
Moscow State Technical University of Civil Aviation
Russian Federation
Russian Federation
PhD student,
Moscow
V. V. Efimov
Moscow State Technical University of Civil Aviation
Russian Federation
Russian Federation
Doctor of Science, Associate Professor, Professor,
Moscow
V. A. Ivchin
Mil Moscow Helicopter Plant
Russian Federation
Russian Federation
PhD, Head of Division,
Tomilino, Moscow Region
References
1. Volodko A.M., Sviridenko A.N. Vliyanie transportiruemogo gruza na ehffektivnost upravleniya vertolyotom [The influence of carrying load on the helicopter control effectiveness]. Nauchnyi Vestnik MGTU GA [Scientific Bulletin of MSTUCA], 2008, no. 125, pp. 191–196. (in Russian)
2. Kozlovsky V.B., Parshentsev S.A., Efimov V.V. Vertolet s gruzom na vneshnej podveske [Helicopter with Cargo on External Sling]. Mashinostroenie / Mashinostroenie – Polet. [Mechanical Engineering / Mechanical Engineering-Flight]. Moscow, 2008, 304 p. (in Russian)
3. Efimov V.V. Matematicheskoe opisanie dvizheniya gruza na vneshnej podveske vertoleta [The mathematical description of the cargo motion on the helicopter external sling] Nauchnyi Vestnik MGTU GA [Scientific Bulletin of MSTUCA], 2007, no. 111, pp. 121–128. (in Russian)
4. Efimov V.V. Issledovanie avtokolebanij vertoleta s gruzom na vneshnej trosovoj podveske [Investigation of Self-Oscillations Helicopter with the Cargo on the External Sling] Nauchnyi Vestnik MGTU GA [Scientific Bulletin of MSTUCA], 2012, no. 177, pp. 65–71. (in Russian)
5. Efimov V.V. Dinamicheskaja ustojchivost' gruza na trosovoj vneshnej podveske vertoleta [Investigation of the Dynamic Stability of Cargo on the Helicopter External Sling] Obshherossijskij nauchno-tehnicheskij zhurnal "Polet" [POLYOT All-Russian Scientific-Technical Journal], 2011, no. 3, pp. 26–32. (in Russian)
6. Efimov V.V., Parshentsev S.A. Rezul'taty vychislitel'nyh jeksperimentov po issledovaniju dinamiki vertoleta i gruza na ego vneshnej trosovoj podveske pri polete v nespokojnom vozduhe [The Results of the Mathematical Flight Simulation of the Helicopter with the Cargo on the External Sling] Nauchnyi Vestnik MGTU GA [Scientific Bulletin of MSTUCA], 2008, no. 125, pp. 151–158. (in Russian)
7. Babenko G.N., Efimov V.V., Ivchin V.A. Ocenka adekvatnosti matematicheskoj modeli dinamiki vertoleta s gruzom na vneshnej podveske v chasti upravlyaemosti [Assessing the adequacy of mathematical models of the Mi-8MTV helicopter dynamics in terms of controllability]. Nauchnyi Vestnik MGTU GA [Civil Aviation High Technologies], 2016, no. 226, pp. 175–182. (in Russian)
8. Dmitriev I.S., Esaulov S.Yu. Sistemy upravleniya odnovintovyh vertoletov [Singlerotor helicopter control systems]. Mashinostroenie [Mechanical Engineering]. Moscow. 1969. 219 p. (in Russian)
9. Efimov V.V. Issledovanie vliyaniya parametrov gruza na usloviya ego ravnovesiya na vneshnej podveske vertoleta [Research of influence of cargo parameters on conditions of its balance on the helicopter external sling]. Nauchnyi Vestnik MGTU GA [Scientific Bulletin of MSTUCA], 2010, no. 151, pp. 130–137. (in Russian)
10. Efimov V.V. O vliyanii gruza na vneshnej podveske vertoleta na ego ravnovesie [Effect of cargo on external sling helicopter on its equilibrium]. Nauchnyi Vestnik MGTU GA [Scientific Bulletin of MSTUCA], 2010, no. 154, pp. 79–85. (in Russian)
Review
For citations:
Babenko G.N., Efimov V.V., Ivchin V.A. IMPACT OF AN UNDERSLUNG LOAD ON A HELICOPTER CONTROLLABILITY. Civil Aviation High Technologies. 2016;19(6):8-16. (In Russ.)
Views:
4654
Email this article 
