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Spin induced aerodynamic flow conditions on full-scale aeroplane wing and horizontal tail surfaces

  • R. I. Hoff (a1) and G. B. Gratton (a1)

Abstract

The aerodynamic flow conditions on wings and tail surfaces due to the rotational motion of a spinning aeroplane have been investigated in a full-scale spin flight research programme at the Brunel Flight Safety Laboratory. The wing upper surface vortex has been visualised using smoke and tufts on the wing of a Slingsby Firefly. The flow structures on top of both wings, and on top of the horizontal tail surfaces, have also been studied on a Saab Safir. The development of these rotational flow effects has been related to the spin motion and the effect on the spin dynamics has been studied and discussed. Evidence suggests that the turbulent wake from the wing upper surface vortex impinges the tail of the aircraft during the spin entry. It is hypothesised that the turbulent flow structure on the outside upper wing surface is due to additional accelerations induced by the rotational motion of the aeroplane. Furthermore, the lightening in stick force during spin entry and the apparent increase in push force required for spin recovery corresponds to the observed change in flow condition on the horizontal tail. The difference in pressure on the upper and lower horizontal tail surfaces have been measured using differential pressure sensors, and the result corresponds both with the observed flow conditions and earlier research results from NASA.

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1 Sobie, B.PICTURE: Flight gets first look at redesigned SkyCatcher, Flightglobal.com, Business & GA Article, 03/02/09.
2. Trimble, S. SkyCatcher future in doubt after second flight test crash, Flightglobal.com, News Article, 20/03/09.
3. Fox, L.A. Lancair 400 Spin Testing and Spin Chute Release Failure, Proceedings of the 48th Annual SETP Symposium, 2004.
4. Roberts, S.C. Flight Test Lessons Learned from the Spinning Trials of the Gippsland GA-8 Single Engine General Aviation Aircraft, Proceedings of the 44th Annual SETP Symposium, 2000.
5. Sling LSA Prototype Lost During Spin Testing, EAA News, 25 February 2010.
6. South African Civil Aviation Authority, Aircraft Accident Report and Executive Summary, Sling, ZU-TAF, Ref. CA/18/2/3/8756.
7. Hoff, R.I. The Challenges of Light Aeroplane Spin Testing & Research, 4th European Flight Test Safety Workshop, London, UK, 28 September 2010.
8. Hoff, R.I. and Gratton, G.B. Camera tracking and qualitative airflow assessment of a 2-turn erect spin, Aeronaut J, May 2012, 116, (1179).
9. Stinton, D. Flying qualities and flight testing of the airplane, AIAA, Reston, VA, USA, ISBN 1-56347-274-0, 1996.
10. Bowman, J.S. Jr Summary of spin technology as related to light General-Aviation Airplanes, NASA TN D-6575, Washington DC, USA, December 1971.
11. Burk, S.M. Jr and Bowman, J.S. Jr and White, W.L. Spin-tunnel investigation of the spinning characteristics of typical Single-Engine General Aviation Airplane Designs. I – Low-wing model A: Effects of tail configurations, NASA Technical Paper 1009, September 1977.
12. Bowman, J.S. Jr, Hultberg, R.S. and Martin, C.A. Measurements of Pressures on the Tail and Aft Fuselage of an Airplane Model During Rotary Motions at Spin Attitudes, NASA Technical Paper 2939, 1989.
13. Brown, A.P. Dillon, J. Craig, G. and Erdos, R. Flight Manoeuvre and Spin Characteristics of the Harvard Mk 4: Application to Human Factors Flight Research, AIAA Atmospheric Flight Mechanics Conference and Exhibit, Providence, Rhode Island, USA, 16-19 August 2004, 2004-4815.
14. Fisher Del, D.F., Frate, J.H. and Richwine, D.M. In-Flight Flow Visualization Characteristics of the NASA F-18 High Alpha Research Vehicle at High Angles of Attack, NASA TM-4193, May 1990.
15. Davis, M.C. and Saltzman, J.A. In-Flight Wing Pressure Distributions for the NASA F/A-18A High Alpha Research Vehicle, NASA TP-2000-209018, March 2000.
16. Comet, Smoke Signals for Parachutists, Data Sheet, Issue 24 April 2003.
17. MTi-G User Manual and Technical Documentation, Xsens Technologies B.V., Document MT0137P, Revsion H, 15 October 2010.
18. Muller, D. and Pommera, G.Spinning the modified ROBIN R2160, Cockpit, The Society of Experimental Test Pilots, April/May/June 1999.
19. Pitot-Static System PSS-8, Interface Definition Document, Simtec Buergel AG, Issue 1, 28 August 2012
20. Private correspondance with Simtec Buergel AG, 21 November 2012.
21. Airplane Manual SAAB SAFIR 91B-2, Description, Control Surfaces, 3-4.
22. Pettersen, S. Weather Analysis and Forecasting, Second Edition, 1, Motion and Motion Systems, McGraw-Hill, 1956.
23. Meriam, J.L. and Kraige, L.G. Engineering Mechanics, Dynamics, 1993, 2, 3rd ed, ISBN 0-471-59273-0.
24. Letnik, D. and Dickinson, M.H. Biofuiddynamic scaling of flapping, spinning, and translating fns and wings, J Experimental Biology, 5 February, 2009, (212), pp 26912704.

Spin induced aerodynamic flow conditions on full-scale aeroplane wing and horizontal tail surfaces

  • R. I. Hoff (a1) and G. B. Gratton (a1)

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