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Showing 1 to 4 of 4 for “"Small propellers."”.
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The design of small propellers operating at low Reynolds numbers and associated experimental evaluation.
Small-scale Unmanned Aerial Systems (UASs) are becoming increasingly important in the field of intelligence, surveillance, and reconnaissance. As the desire for higher payloads and longer flight times increases, so does the need to optimize the performance of UAS components. It has been found that …
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Post stall propeller behavior at low Reynolds numbers
… Post stall aerodynamics was observed in small propellers at low Reynolds numbers. First, performance data (thrust, power, and efficiency) of set variable pitch propellers was acquired in a wind tunnel. The propellers were 6 to 9.9 inches in diameter and were able to pitch to extreme …
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Performance and slipstream characteristics of small-scale propellers at low Reynolds numbers
The low Reynolds number effects of small-scale propellers were investigated. At the Reynolds numbers of interest (below 100,000), a decrease in lift and an increase in drag is common making it difficult to predict propeller performance characteristics. A propeller testing apparatus was built to …
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The Influence of Propeller Position and Size on the Aerodynamics of Blown Wings
… and landing. It is shown that the use of small diameter jets allows high velocity jets to be used for a fixed landing thrust, increasing the lift coefficient. It is also shown that the wing must be fully immersed in the jet to avoid premature stall. This is only possible by placing the jet …