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Hover Testing of a Large Multi-Element Arc Wing VTOL Research Model
Technical Paper
2016-01-1979
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Technology to create a VTOL for general aviation that is fast, efficient, easy to fly, and affordable, has proven elusive. Bertelsen Design LLC has built a large research model to investigate the potential of the arc wing VTOL to fulfill these attributes. The aircraft that is the subject of this paper weighs approximately 145 kg (320 lbs) and features coaxial, dual-rotating propellers, diameter 1.91 m (75 inches). Power is from an MZ 202 two-cycle, two-cylinder engine. Wingspan is 1.82 m (72 inches). The arc wing differentiates this aircraft from previous deflected-slipstream prototypes, which suffered from pitch-trim issues during transition. This paper will present configuration details of the Bertelsen model, showing how it is possible to generate high lift from a short-span wing system. The Bertelsen model can hover out of ground effect using just two arc-wing elements: a main wing and a “slat”. More importantly, the paper will show that the mechanics are in place to accomplish conversion to high-speed cruise without trim upset during transition. This discussion will include documentation of the unique pitch stability characteristics of the single and multi-element arc wing, and how the dynamic force balance can be manipulated to achieve an aerodynamic assist for the transition process.
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Bertelsen, W., "Hover Testing of a Large Multi-Element Arc Wing VTOL Research Model," SAE Technical Paper 2016-01-1979, 2016, https://doi.org/10.4271/2016-01-1979.Also In
References
- Bertelsen , William D. and Bertelsen , William R. History of Deflected Slipstream VTOL Aircraft CiteSeerX digital library http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.110.9955&rep=rep1&type=pdf
- James , Harry A. , Wingrove , Rodney C. , Holzhauser , Curt A. , Drinkwater , Fred J. III Wind-Tunnel and Piloted Flight Simulator Investigation of a Deflected-Slipstream VTOL Airplane, The Ryan VZ-3RY NASA TN D-89 November 1959
- Turner , Howard L. and Drinkwater , Fred J. III Some Flight Characteristics of a Deflected Slipstream V/STOL Aircraft NASA TN D-1891 1963
- Bertelsen , William D. Introduction to the Arcopter Arc Wing and the Bertelsen Effect for Positive Pitch Stability Hanson , P.W. Science and Technology of Low Speed and Motorless Flight 1979 March 29-30 NASA Langley Research Center Hampton, VA NASA Conference Publication 2085, Part I
- Bertelsen , William D. Preliminary Investigation of Arc Wing Pitch Characteristics Journal of Aircraft 43 5 1564 1567 September October 2006 10.2514/1.20509
- Bertelsen , William D. Laying the Groundwork for the Design of an Affordable 300-kt STOL presented at AHS International Forum 62 Phoenix, AZ May 9-11, 2006