Abstract
The purpose of this paper to provide the reader with a general introduction and overview of propulsion needs of unmanned aerial systems (UASs), especially the small class of UASs which are expected to experience the most growth in the next 5 to 10 years. Increased flight time, payload and sensor/instrumentation combined with a need to reduced operating costs means that new engine technologies will be needed to meet these demands. Small engine combustion principals are highlighted with an emphasis on approaches to improve performance and potential emission regulations. Efficiency losses for small UASs are high due to increased specific surface area, but because these engines are relatively primitive in design, efficiency gains can be made through better understanding of combustion, and the application of technologies used to improve the performance of automotive-scale engines. Engine advancement will need advanced testing capabilities combining both thrust stand and engine dynamometer-based evaluations. Both methodologies are briefly described in the context of small UAS engine studies and the durability testing procedures prescribed the U. S. military are briefly discussed.
Original language | English |
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State | Published - 2015 |
Event | AUVSI Unmanned Systems 2015 - Atlanta, United States Duration: May 4 2015 → May 7 2015 |
Conference
Conference | AUVSI Unmanned Systems 2015 |
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Country/Territory | United States |
City | Atlanta |
Period | 05/4/15 → 05/7/15 |