Empirical measurements of small unmanned aerial vehicle co-axial rotor systems.

Prior, Stephen D. and Bell, Jonathon (2011) Empirical measurements of small unmanned aerial vehicle co-axial rotor systems. Journal of Science and Innovation, 1 (1). pp. 1-18. ISSN 2078-5453

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Abstract

Small unmanned aerial vehicles (SUAV) are beginning to dominate the area of intelligence, surveillance, target acquisition and reconnaissance (ISTAR) in forward operating battlefield scenarios. Of particular interest are vertical take-off and landing (VTOL) variants. Within this category co-axial rotor designs have been adopted due to their inherent advantages of size and power to weight ratio. The inter-rotor spacing attribute of a co-axial rotor system appears to offer insight into the optimum design characteristic. The H/D ratio has been cited as a significant factor in many research papers, but to date has lacked an empirical value or an optimal dimensionless condition. In this paper the H/D ratio of a SUAV has been explored thoroughly, reviewing the performance of these systems at incremental stages, the findings from this study have shown that a range of H/D ratios in the region of (0.41-0.65) is advantageous in the performance of SUAV systems. This finding lends itself to the theory of inter-rotor spacing as a non-dimensionally similar figure, which cannot be applied across a spectrum of systems; this could be attributed to the viscous losses of flight at low Reynolds Numbers (< 50,000).

Item Type: Article
Research Areas: A. > School of Science and Technology
Item ID: 6936
Notes on copyright: Open access journal
Depositing User: Dr Stephen Prior
Date Deposited: 27 Jan 2011 12:47
Last Modified: 01 Oct 2015 16:33
URI: http://eprints.mdx.ac.uk/id/eprint/6936

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