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Titel:

On the Flight Performance Impact of Landing Gear Drag Reduction Methods for Unmanned Air Vehicles

Autor(en): F. Götten, D.F. Finger, M. Havermann, C. Braun, F. Gómez, C. Bil
Zusammenfassung: The flight performance impact of three different landing gear configurations on a small, fixed-wing UAV is analyzed with a combination of RANS CFD calculations and an incremental flight performance algorithm. A standard fixed landing gear configuration is taken as a baseline, while the influence of retracting the landing gear or applying streamlined fairings is investigated. A retraction leads to a significant parasite drag reduction, while also fairings promise large savings. The increase in lift-to-drag ratio is reduced at high lift coefficients due to the influence of induced drag. All configurations are tested on three different design missions with an incremental flight performance algorithm. A trade-off study is performed using the retracted or faired landing gears weight increase as a variable. The analysis reveals only small mission performance gains as the aerodynamic improvements are negated by weight penalties. A new workflow for decision-making is presented that allows to estimate if a change in landing gear configuration is beneficial for a small UAV.
Veranstaltung: Deutscher Luft- und Raumfahrtkongress 2018, Friedrichshafen
Verlag, Ort: Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2018
Medientyp: Conference Paper
Sprache: englisch
Format: 21,0 x 29,7 cm, 11 Seiten
URN: urn:nbn:de:101:1-2018121411573397502495
DOI:10.25967/480058
Stichworte zum Inhalt: Unmanned Aerial Vehicle, Landing Gear, UAV, Aerodynamics, CFD
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Zitierform:Götten, F.; Finger, D.F.; et al. (2018): On the Flight Performance Impact of Landing Gear Drag Reduction Methods for Unmanned Air Vehicles. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). https://doi.org/10.25967/480058. urn:nbn:de:101:1-2018121411573397502495.
Veröffentlicht am: 14.12.2018