Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/705
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dc.contributor.authorGratton, GB-
dc.contributor.authorNewman, S-
dc.coverage.spatial19en
dc.date.accessioned2007-04-16T12:00:41Z-
dc.date.available2007-04-16T12:00:41Z-
dc.date.issued2006-
dc.identifier.citationEuropean Symposium of Society of Experimental Test Pilots, Dresden, Germany, 21 - 25 Jun 2006en
dc.identifier.urihttp://bura.brunel.ac.uk/handle/2438/705-
dc.description.abstractThe tumble mode is a pitching departure from controlled flight which leads to a pitch autorotation that is generally unrecoverable – resulting in vertical ground impact, usually preceded by in-flight breakup (the mechanism for which, surprisingly, can sometimes prevent loss of life). This was identified in work led by the British Microlight Aircraft Association beginning in 1997 as a response to a number of fatal accidents in Rogallo winged microlight aeroplanes, although the tumble is also known to occur to hang-gliders. This paper explains how this class of aeroplane is controlled, and how it has been found that they can enter the tumble mode. The mechanism by which the tumble can be entered is described. This has led to work showing how flight testing can be used to establish and demonstrate resistance to tumble entry – particularly important with increasing number of very high performance flexwings. These flight tests will be explained, together with the significance of the results. Recent accident investigation work has also shown a new mechanism of tumble entry, through partial failure of the A-frame structure and the pitch-trimmer mechanism. Also described is a possible relevance to well known historical accidents to flying wing aeroplanes – specifically the YB-49 and dH-108, and discovered data on the characteristics of the BKB-1 flying wing glider; are also described.en
dc.format.extent5112624 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoen-
dc.publisherSociety of Experimental Test Pilotsen
dc.subjectTumbleen
dc.subjectMicrolighten
dc.subjectRogalloen
dc.subjectYB-49en
dc.subjectAutorotationen
dc.subjectHang-glideren
dc.subjectdH-108en
dc.subjectBKB-1en
dc.titleTowards the tumble resistant microlighten
dc.typeResearch Paperen
Appears in Collections:Aeronautics
Mechanical and Aerospace Engineering
Brunel Design School Research Papers
Brunel Design School Research Papers

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