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Showing 1 to 7 of 7 for “"drag polar"”.
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Flight Testing Small, Electric Powered Unmanned Aerial Vehicles
Flight testing methods are developed to find the drag polar for small UAVs powered by electric motors with fixed-pitch propellers. Wind tunnel testing was used to characterize the propeller-motor efficiency. The drag polar was constructed using data from flight tests. The proposed methods were …
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Influence of low-speed aerodynamic performance on airport community noise
… method is generally capable of predicting a drag polar, drag as a function of lift, to within one-percent. It also determines the changes of the drag polar due to high-lift devices, both slat and flap deployment, to within about three-percent. In addition, the method contains correlations to …
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Development of Automatic CFD Grid Generation for the Design of the Preliminary Wing Sweep Schedule for the Gulfstream Quiet Supersonic Jet
… cases to be investigated. The examination of the drag polar for different Mach cases indicated the optimum corresponding wing sweep position. The study results revealed that for the Mach 0.85 case, the wings should remain at the forward most pivoted position (Ʌ=25°). The Mach 1.1 case indicted …
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Modeling performance and noise of advanced operational procedures for current and future aircraft
… required thrust levels, etc.) based on drag polar supplied either by the Base of Aircraft Data (BADA 4) for current aircraft or by TASOPT for new aircraft. Benefits of this modeling framework include the flexibility in the aircraft and procedure analyzed and the ability to predict the …
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Flight Testing Small UAVs for Aerodynamic Parameter Estimation
<p>A flight data acquisition system was developed to aid unmanned vehicle designers in verifying the vehicle's design performance. The system is reconfigurable and allows the designer to choose the correct combination of complexity, risk, and cost for a given flight test. The designer can also …
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Predicting Drag Polars For Micro Air Vehicles
<p> Drag polars for three Micro Air Vehicles (MAVs) were measured at Reynolds numbers of 70,000, 50,000, 30,000, and 10,000 and compared to predictions generated using the classical approach. The MAVs tested had different configurations and aspect ratios varying from 1.2 to 1.6 and ratios of wetted …
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Measurement of aerodynamic characteristics of MAVs using motion tracking
… manufactured propeller, and the lift and drag characteristics of the aircraft was analyzed. The results indicate that the propeller induced flow influences the aerodynamic performance of the aircraft. Results indicate a delay in the onset of stall, an increase in the lift curve slope, and …