TY  - JOUR
A1  - Finger, Felix
A1  - Braun, Carsten
A1  - Bil, Cees
T1  - Impact of electric propulsion technology and mission requirements on the performance of VTOL UAVs
JF  - CEAS Aeronautical Journal
N2  - One of the engineering challenges in aviation is the design of transitioning vertical take-off and landing (VTOL) aircraft. Thrust-borne flight implies a higher mass fraction of the propulsion system, as well as much increased energy consumption in the take-off and landing phases. This mass increase is typically higher for aircraft with a separate lift propulsion system than for aircraft that use the cruise propulsion system to support a dedicated lift system. However, for a cost–benefit trade study, it is necessary to quantify the impact the VTOL requirement and propulsion configuration has on aircraft mass and size. For this reason, sizing studies are conducted. This paper explores the impact of considering a supplemental electric propulsion system for achieving hovering flight. Key variables in this study, apart from the lift system configuration, are the rotor disk loading and hover flight time, as well as the electrical systems technology level for both batteries and motors. Payload and endurance are typically used as the measures of merit for unmanned aircraft that carry electro-optical sensors, and therefore the analysis focuses on these particular parameters.
Y1  - 2018
U6  - https://doi.org/10.1007/s13272-018-0352-x
SN  - 1869-5582 print
SN  - 1869-5590 online
VL  - 10
IS  - 3
SP  - 843
PB  - Springer
ER  - 
TY  - CHAP
A1  - Blome, Hans-Joachim
T1  - Über die kulturelle Bedeutung der Raumfahrt
T2  - Überleben im Weltraum. Auf dem Weg zu neuen Grenzen. 21. Berliner Kolloquium der Daimler und Benz Stiftung 24. Mai 2017
Y1  - 2018
SP  - 5
EP  - 5
ER  - 
TY  - BOOK
A1  - Wahle, Michael
T1  - Kinetik. - (Dynamik ; 2)
Y1  - 1994
SN  - 3- 930085-94-1
PB  - Mainz
CY  - Aachen
ET  - 1. Aufl.
ER  - 
TY  - PAT
A1  - Wahle, Michael
T1  - Stoßdämpfer : Offenlegungschrift / Europäische Patentschrift
T1  - Shock absorber : patent of invention
Y1  - 1994
PB  - Deutsches Patent- und Markenamt / Europäisches Patentamt
CY  - München / Den Hague
ER  - 
TY  - GEN
A1  - Eickmann, Matthias
A1  - Esch, Thomas
A1  - Funke, Harald
A1  - Abanteriba, Sylvester
A1  - Roosen, Petra
T1  - Biofuels in Aviation – Safety Implications of Bio-Ethanol Usage in General Aviation Aircraft
N2  - Up in the clouds and above fuels and construction materials must be very carefully selected to ensure a smooth flight and touchdown. Out of around 38,000 single and dual-engined propeller aeroplanes, roughly a third are affected by a new trend in the fuel sector that may lead to operating troubles or even emergency landings: The admixture of bio-ethanol to conventional gasoline. Experiences with these fuels may be projected to alternative mixtures containing new components.
Y1  - 2014
N1  - 2. International Conference of the Cluster of Excellence Tailor-Made Fuels from Biomass, Aachen 2013
ER  - 
TY  - PAT
A1  - Wahle, Michael
A1  - Friedrich, Peter Ralph
T1  - Anordnung zur schwingungsisolierenden Lagerung von Massen oder elastischen Systemen : Offenlegungsschrift
T1  - Mounting for isolating masses and elastic systems from vibration : patent of invention
Y1  - 1996
PB  - Deutsches Patent- und Markenamt
CY  - München
ER  - 
TY  - BOOK
A1  - Wahle, Michael
T1  - Kinematik. - (Dynamik ; 1)
Y1  - 1993
SN  - 3-930085-25-9
PB  - Mainz
CY  - Aachen
ET  - 1. Aufl.
ER  - 
TY  - CHAP
A1  - Czupalla, Markus
T1  - Pflanzen oder Maschinen - was läßt uns auf dem Mars überleben?
T2  - Überleben im Weltraum. Auf dem Weg zu neuen Grenzen. 21. Berliner Kolloquium der Daimler und Benz Stiftung 24. Mai 2017
Y1  - 2017
SP  - 12
EP  - 12
ER  - 
TY  - PAT
A1  - Nonhoff, Gottfried
A1  - Wahle, Michael
T1  - Anordnung zur Dämpfung von Schwingungen an Bauwerken und Bauteilen : Offenlegungsschrift / Europäische Patentschrift
T1  - Arrangement for damping vibrations of structures or parts thereof : patent of invention
Y1  - 1990
PB  - Deutsches Patent- und Markenamt / Europäisches Patentamt
CY  - München / Den Hague
ER  - 
TY  - CHAP
A1  - Rosenkranz, Josef
T1  - Verbesserung der Laufruhe des Verbrennungsmotors durch abgestimmte qualitätssteigernde Maßnahmen beim Auswuchten des Kurbeltriebs
T2  - Antriebstechnisches Kolloquium '93 / Industrieentwicklungen und Forschungsergebnisse für die Maschinenüberwachung und die Konstruktion in der Antriebstechnik. - (Reihe IME-Leitfaden)
Y1  - 1993
SN  - 3-8249-0139-0
SP  - 176
EP  - 199
PB  - Verl. TÜV Rheinland
CY  - Köln
ER  -