DETERMINATION OF HYDRODYNAMIC CHARACTERISTICS OF A RADIO-CONTROLLED AIRPLANE MODEL WITH AIR CUSHION LANDING GEAR
Abstract
This article presents the results of the hydrodynamic parameters of radio-controlled models (RCM) of the aircraft with the landing gear on an air cushion (REFERENCED) obtained during tests in the water tank of TSAGI NIMC on land- ing modes with varying alignment and pressure in air cushion chassis on calm and disturbed water surfaces.ACLG’s RCM is based on the Froude criterion. The experimental data of the real aircraft Dingo, LMS, An-26, C-130 Hercules (size, weight, thrust) parameters were processed. Tests were carried out, using the standard testbed, utiliz- ing the dynamically-corresponding models in the water tank. Drag best value rate while travelling along the smooth water was reached at the rear centering, with balloon pressure on the water of 700 Pa. In this case, the hump drag, at velocity of 2 mps, does not exceed 29 Newtons (hydrodynamic fineness on the ‘drag hump’ is, Кг=13,5), while at velocity of 10 mps, the drag is 30 Newtons, at Кг =13.The most unfavourable mode of motion is the one with configuration of lowered pressure in the balloons (400 Pa).In these cases, the Кг = 6,5. At motion with yaw angle of 10º, the drag rate meaning practically stands stable (Кг = 13,1), while at 20º it grows (Кг = 10,6).At motion along the waved surface, the critical wave length equals to two thirds of the ACU, while drag raises by the quarter, compared to other wave types. Such vehicles can be used in the hard-to-reach regions of the Russian Federation.
About the Author
Yu. Yu. Merzlikin
Research Moscow complex of Central Aerohydrodynamic Ihstitute
Russian Federation
Russian Federation
Chief Engineer,
Moscow
References
1. Morozov V.P., Petrov A.V., Merzlikin Y.Y. Printsip "rannego soglasovaniya" aerodinamicheskoi komponovki samoleta s shassi na vozdushnoi podushke [Principle of "early approval" aerodynamic layout of the aircraft with the landing gear on an air cushion]. Nauchnyi Vestnik MGTU GA. [Scientific Bulletin of MSTUCA], 2015, no. 221, pp. 109–115.
2. Dunaevsky A.I., Mikhailov Y.S., Redkin A.V., Morozov V.P. Vliyanie ustanovki modulya shassi na vozdushnoi podushke na kharakteristiki legkogo mnogotselevogo samoleta [The influence of module mounting the chassis on an air cushion on the characteristics of the light multipurpose aircraft]. Sbornik dokladov mezhdunarodnoi konferentsii po gidroaviatsii "Gidroaviasalon-2014" sentyabr' 5–6 [Proceedings of the X international conference on hydroaviation "hydroaviasalon-2014". Publishing house of the Institute. September 5–6. 2014]. Part II. Pp. 125–132.
3. Morozov V.P., Merzlikin Y.Y. Vesovoi raschet shassi na vozdushnoi podushke transportnogo samoleta v pervom priblizhenii [Weight calculation of the chassis on the airbag of the transport aircraft as a first approximation]. Nauchnyi Vestnik MGTU GA [The Scientific Bulletin of MSTUCA], 2016, no. 223, pp. 174–180. (in Russian)
4. Merzlikin Y.Y., Dolgopolov A.A. Shassi na vozdushnoi podushke s mnogosektsionnym formirovaniem vozdushnoi podushki dlya letatel'nogo apparata [The chassis on the airbag with multisection forming of the airbag for the flight vehicle]. Nauchnyi Vestnik MGTU GA [The Scientific Bulletin of MSTUCA], 2016, no. 223, pp. 168–173. (in Russian)
5. Kulbida V.T., Morozov V.P. Transportnaya effektivnost' letatel'nykh apparatov bezaerodromnogo bazirovaniya [Transport efficiency of aircrafts of out of aerodrome basing]. Moscow. NIA – the Nature publishing house. 2003. P. 22. (in Russian)
6. Martynov A.K. Eksperimental'naya aerodinamika [Experimental aerodynamics]. Moscow. Maschistroenie [Industrial Engineering]. 1972. P. 69. (in Russian)
7. Demeshko G.F. Proektirovanie sudov. Amfibiinye suda na vozdushnoi podushke [Ship Design. Amphibious hovercraft]. Vol. 1. St. Petersburg. Shipbuilding. 1992. 269 р. (in Russian)
8. Dolgopolov A.A., Zhurikhin Yu.P., Nikiforova I.G., Chernyak V.V. Issledovanie kharakteristik upravlyaemogo dvizheniya samoletov s vzletno-posadochnym ustroistvom na vozdushnoi podushke po polose v usloviyakh bokovogo vetra [Study of characteristics of the managed movement of planes with the runway device on the airbag on a strip in a side wind]. Trudy TsAGI k 80-letiyu instituta [Works TsAGI to the 80 anniversary of institute]. 1999. No. 2634. Moscow. TsAGI. 313 p. (in Russian)
9. Dolgopolov A.A., Bragazin V.F., Merzlikin Y.Y., Brusov V.A., Sokolyansky V.P., Guskov V.N. Razrabotka sredstv i zakonov upravleniya LA s kombinirovannym shassi pri rulezhke, razbege i probege v usloviyakh bokovogo vetra i pri uklonakh VPP [Development of means and the control laws of aircraft with the combined chassis in case of a taxiing, running start and a run in a side wind and in case of runway biases]. Sbornik dokladov VIII nauchnoi konferentsii po gidroaviatsii "Gidroaviasalon-2010" [Collection of reports of the VIII scientific conference on hydroaviation "hydroaviasalon-2010"]. Мoscow. TsAGI. 2010. Pp. 306–313. (in Russian)
10. Dolgopolov A.A., Maslov L.A., Nikiforova I.G., Chernyak V.V. Dinamicheskaya nagruzhennost' i amortizatsionnye svoistva vzletno-posadochnykh ustroistv vysokoi prokhodimosti s ispol'zovaniem vozdushnoi podushki [Dynamic loading and depreciation properties of runway devices of high passability with use of the airbag]. Trudy TsAGI k 80-letiyu institute [Works TsAGI to the 80 anniversary of institute]. 1999. No. 2634. Moscow. TsAGI. 295 p. (in Russian)
Review
For citations:
Merzlikin Yu.Yu. DETERMINATION OF HYDRODYNAMIC CHARACTERISTICS OF A RADIO-CONTROLLED AIRPLANE MODEL WITH AIR CUSHION LANDING GEAR. Civil Aviation High Technologies. 2016;19(6):147-155. (In Russ.)
Views:
564
Email this article 
