Anomaly of rotor dynamics in ultra-light helicopter – Robinson R22

• Autorzy: Sobieszek Agnieszka

Identyfikatory

DOI

10.2478/kones-2019-0113

• Języki publikacji: EN

Abstrakty

EN

The article presents the analysis of anomaly of rotor dynamics in ultra-light helicopter - Robinson R22. Robinson R22 is two-seat, two-blade main rotor and single-engine helicopter, well known as simple and common used aircraft because of low price and high availability. At the same time, large number of accidents and strictly defined rules (recommended piloting technique) and weather condition for safe flight show disadvantages of Robinson R22. The reason for considering this topic is the analysis of different flight properties and helicopter behaviour as well as easy entering into dangerous flight manoeuvre. In the article different flight properties and loss of control during the pull-up, manoeuvre or vertical gusts of wind and mast bumping accidents were analysed. Analysis shows that problem may be caused by construction of three-hinged rotor hub, designed and patented by F. Robinson. Article presents model of rotor hub and review of main rotor and rotor hub construction in light helicopters. Because of number of accidents, caused by the unusual behaviour of Robinson R22, restrictive pilotage rules were introduced: prohibition of flight in certain weather conditions, the necessity of attending additional training conducted by trained instructors. To reduce the probability of an accident a special instruction for specific Robinson R22 properties was created. Moreover, the statistics of accidents resulting from loss of control and review of legal changes caused by Robinson R22 accidents are presented.

Słowa kluczowe

EN

rotor hub; Robinson R22; helicopter; pull-up manoeuvre; rotor dynamics

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2019
• Tom: Vol. 26, No. 4
• Strony: 235--239
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Sobieszek Agnieszka

• Łukasiewicz Research Network – Institute of Aviation Department of Transport and Energy Conversion Division Krakowska Av. 110/114, 02-256 Warsaw, Poland tel.: [phone], ext. 224, fax: [phone]

Bibliografia

• [1] Bereżański, J., Własności dynamiczne i eksploatacyjne śmigłowców ultralekkich na przykładzie śmigłowca Robinson R22, Prace Instytutu Lotnictwa, s. 117-121, Warszawa 1997.
• [2] Bell model 206 series Jet Ranger, Maintenance Manual.
• [3] NTSB Investigates Loss-of-control Accidents Among Lightweight Helicopters, Flight Safety Fundation, Helicopter Safety, Canada 1997.
• [4] Robinson Helicopter Company R22 loss of main rotor control accidents, Special Investigation Report, Washington 1996.
• [5] Robinson model R22, Maintenance Manual.
• [6] Wallace, L., You Too Can Hover, Robinson R22 teaches the world how to fly, Flying Magazine, p. 58, March 2002.
• [7] https://en.wikipedia.org/wiki/Helicopter_rotor.
• [8] https://disciplesofflight.com/sfar-73-a-rule-unlike-any-other-in-aviation.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).